Skocz do pozycji: 1.

Tytuł:

Getting athletes back in the game: A comprehensive rehabilitation assessment of knee injuries

Autorzy:

Arsovski, Denis
Domazeti, Erblin
Jovanovska, Tanja
Ristevska-Dimitrovska, Gordana

Powiązania:

https://bibliotekanauki.pl/articles/13102428.pdf

Data publikacji:

2023

Wydawca:

Akademia Tarnowska

Tematy:

knee rehabilitation
physical activity
athletes
physical therapy
knee pain

Opis:

Movement is an essential characteristic that has developed over the course of human evolution. With the inclusion of various populations in sports activities, sports have become an important part of people’s daily lives. Knee injuries are common among athletes, with knee joint being the most vulnerable to various injuries. Knee injuries require appropriate treatment to allow the athlete to return to their sports activities. Additionally, this study aimed to increase awareness of the importance of preventing knee injuries in sports and to highlight the potential impact of such injuries on an athlete’s ability to participate in their sport.A cross-sectional study was conducted to evaluate the functional outcomes of athletes with knee injuries. The study included 38 patients with knee injuries (ACL, meniscal injuries, collateral ligament injuries) out of which 21 were physically active athletes, 9 were not, but they were athletes who were not involved in sports at the time of the testing and 8 were recreational athletes. The majority of respondents (76%) reported that they sustained the injury during sports activities. Knee pain was reported as at least once a week by most respondents. The study highlights the importance of proper knee injury prevention measures during sports activities and the need for prompt and effective rehabilitation for those who do suffer injuries. Overall, these findings have important implications for the treatment and management of knee injuries among athletes and individuals seeking to maintain an active lifestyle.

Źródło:

Health Promotion & Physical Activity; 2023, 22, 1; 8-17
2544-9117

Pojawia się w:

Health Promotion & Physical Activity

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Comparison of results of ACL reconstruction using LARS method and autogenous ST/GR graft

Autorzy:

Płocki, Jędrzej
Pelikan, Piotr
Bejer, Agnieszka
Granek, Arkadiusz
Krawczyk-Suszek, Marlena
Kotela, Ireneusz

Powiązania:

https://bibliotekanauki.pl/articles/306843.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

kolano
wiązadło
LARS
artroskopia
knee
ACL reconstruction
knee function
arthroscopy

Opis:

The objective of the study was assessment of the function of the knee joint after ACL reconstruction using the LARS method and autogenous graft. The study was of a retrospective character and included 96 patients who had undergone reconstruction of the torn ACL. The study was conducted within 36–48 months after surgery. Methods: In order to compare the results of the ACL reconstruction performed with 2 types of grafts, the following instruments were used: Lysholm Knee Scoring Scale, SF 36v2 questionnaire for assessment of health-related quality of life, and Biodex System 4 for isokinetic muscle testing. Results: No differences in the evaluation of the quality of life measured using SF 36v2 questionnaire were observed between the LARS and ST GR groups. Using the Lysholm Scale, the distribution of knee function scores was compared according to the type of surgery. There are no grounds to confirm the differences in the distribution of knee function scores considering the type of graft ( p = 0.756). Isokinetic test showed a significant weakening of muscle strength in the operated limb, compared to the strength of the healthy limb. Conclusions: The type of graft used for ACL reconstruction does not exert an effect on the quality of life of patients or the level of their knee joint function. Extensor and flexor muscles strength of the knee joint was lower in the operated limb, irrespective of the type of graft used. Weak relationships were observed between the level of knee joint function and extensor muscle strength of this joint.

Źródło:

Acta of Bioengineering and Biomechanics; 2019, 21, 1; 113-119
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

A Novel Method for Calculation of Knee Deformation Angles in Clinical and Sport Biomechanics

Autorzy:

Haddas, Ram

Powiązania:

https://bibliotekanauki.pl/articles/1054895.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

Cutting Maneuver
Joint Architecture
Kinematic
Knee Deformation
Knee Injuries
Orthopaedic Surgery

Opis:

Biomechanical analyses seek to improve understanding of the mechanisms of knee injury and to find ways to reduce knee injury incidence. Many clinical biomechanics researchers use a standard kinematic adopted from Newington Children’s Hospital. Biomechanical studies include the knee joint configurations, where joint architecture immutably constrains and guides movement outcomes. Investigators will default to reporting resultant joint deformation without considering the influence of joint architectural configurations on kinematic responses. The purpose of this study was to develop a new joint angular kinematic method that accounts for influence of dynamic joint architectural configuration on deformation values. Twenty subjects performed unloaded dynamic flexion/ extension and 45° cutting maneuver. The knee deformation angles obtained with the new method proposed were compared with the values that obtained using the standard method. One way repeated measurement ANOVA’s was used to compare knee deformation angles values from the standard method that uses a static trial and the new method that uses a dynamic trial. The proposed method distinguishes between dynamic joint architectural configuration and joint deformation. Loaded standard abduction/adduction (β) and rotation (γ) angles were 3.4 ±1.8° and 11.2 ±3.8°, respectively. Using the new method, the β and γ angles decrease to 1.5 ±1.4° (<0.05) and 7.1 ±1.8° (<0.05) during cutting. The new method accounted for dynamic joint architectural configuration produced loaded β and γ angles that had smaller magnitudes than the standard method, suggesting that previous studies may have overestimated β and γ angles. Injury management strategies could be influenced by a consideration for dynamic joint architectural configuration. Such a consideration could influence ligament repair strategies. Future studies should account for dynamic configuration when establishing the influence of joint deformation on graft design and appropriate isometry values during reconstruction.

Źródło:

Central European Journal of Sport Sciences and Medicine; 2016, 13, 1; 5-13
2300-9705
2353-2807

Pojawia się w:

Central European Journal of Sport Sciences and Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

The morphology of the articular surfaces of biological knee joints provides essential guidance for the construction of functional knee endoprostheses

Autorzy:

Nagerl, H.
Dathe, H.
Fiedler, Ch.
Gowers, L.
Kirsch, S.
Kubein-Meesenburg, D.
Dumont, C.
Wachowski, M. M.

Powiązania:

https://bibliotekanauki.pl/articles/307060.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

kolano
kinematyka
biomechanika
endoproteza
knee arthroplasty
kinematics
biomechanics
knee
endoprosthesis
pig

Opis:

Purpose: In comparative examinations of kinematics of the knees of humans and pigs in flexional/extensional motion under compressive loads, the significant differential geometric essentials of articular guidance are elaborated to criticise the shaping of the articular surfaces of conventional knee-endoprostheses and to suggest constructional outlines that allow the endoprosthesis to adopt natural knee kinematics. Implantation is discussed with regard to the remaining ligamentous apparatus. Methods: Twelve fresh pig knee joints and 19 preserved human knee joints were moved into several flexional/extensional positions. In each joint, the tibia and femur were repeatably caught by metal plates. After removing all ligaments, the tibia and femur were again caught in these positions, and their points of contact were marked on both articular surfaces. Along the marker points, a thin lead wire was glued onto each surface. The positions and shapes of the four contact lines were mapped by teleradiography. Results: All contact lines were found to be plane curves. The medial and lateral planes were parallel, thus defining the joint’s sagittal plane. In the human knee, as compared to the lateral, the medial femoral contact line was always shifted anteriorly by several millimetres. The tibial contact curve was laterally convex and medially concave. In the pig knees, the lateral and medial contact lines were asymmetrically placed. Both tibial curves were convex. Conclusions: Both knees represent cam mechanisms (with one degree of freedom) that produce rolling of the articular surfaces during the stance phase. Implantation requires preservation of the anterior cruciate ligament, and ligamentous balancing is disadvantageous.

Źródło:

Acta of Bioengineering and Biomechanics; 2015, 17, 2; 45-53
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Molecular correlates of joint pain intensity in osteoarthritis

Autorzy:

Mlost, J.
Bryk, M.
Chwastek, J.
Korostynski, M.
Starowicz, K.

Powiązania:

https://bibliotekanauki.pl/articles/283966.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

osteoarthritis
pathology
knee cartilage

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 107
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Assessment of postural stability in patients after reconstruction of the anterior cruciate ligament with LARS and autogenous graft

Autorzy:

Plocki, J.
Kotela, I.
Bejer, A.
Pelikan, P.
Granek, A.
Krawczyk-Suszek, M.

Powiązania:

https://bibliotekanauki.pl/articles/307030.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

postural stability
knee
ACL reconstruction
LARS
knee function
stabilność postawy
kolano
ACL

Opis:

The aim of the study was to assess static balance after reconstruction of the anterior cruciate ligament (ACL), using gracialis tendons graft (GR) or semi-tendinosus (ST), compared to patients treated with the Ligament Advanced Reinforcement System (LARS). The study was performed within 36 to 48 months after the surgery. Methods: The study included 96 patients. The LARS group consisted of 44 patients, control group operated with ST/GR tendons included 52 patients. The stabilometric platform Alpha was used to assess the static balance. Two 30-second trials in the double-leg stance position with eyes opened and closed were performed. The distribution of loads in a free standing was also assessed. Results: In the test with open eyes the subjects from the LARS group had a significantly longer center of pressure (COP) path, a higher mean velocity, a greater mean COP sway in foot in the lateral direction and a larger path area occupied by the COP graph. During the tests with eyes closed, a significant difference occurred in the mean displacement of COP in lateral direction – greater in the LARS group. In addition, all parameters deteriorated during the tests with eyes closed in both groups. Conclusions: In static balance assessed with eyes closed, more proprioceptive deficits may appear in the LARS group.

Źródło:

Acta of Bioengineering and Biomechanics; 2018, 20, 4; 9-14
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Modelowanie dynamiki stawu kolanowego
Numerical simulation of the human knee joint

Autorzy:

Głowiński, S.

Powiązania:

https://bibliotekanauki.pl/articles/251576.pdf

Data publikacji:

2013

Wydawca:

Instytut Naukowo-Wydawniczy TTS

Tematy:

staw kolanowy
dynamika stawu kolanowego
human knee joint
human knee joint dynamics

Opis:

W artykule przedstawiono budowę i scharakteryzowano liczbę stopni swobody stawu kolanowego. Na podstawie modelu rzeczywistego opracowano model komputerowy stawu z zaimplementowanymi parametrami charakteryzującymi układ mięśniowy. W modelu uwzględniono oddziaływania mięśni oraz wiązadeł na układ szkieletowy, zjawiska kontaktu pomiędzy udem i podudziem, a także pomiędzy udem i rzepką. Model został wykorzystany do przeprowadzenia symulacji ruchu kolana. Zaproponowany model przestrzenny stawu kolanowego umożliwił dokonanie analizy rozkładu sił i momentów oddziaływujących na poszczególne części stawu. Przeanalizowano deformację ścięgien mięśniowych i uzyskane wyniki zobrazowano na wykresach.
In this paper the results of the research based on dynamic simulation of human knee virtual model were presented. Starting from the parts, virtual models (tibia, femur and patella) are realized by using Computational Aided Design software. The coefficients of stiffness and damping were implemented to the model. The model takes into account the impact of the muscles and ligaments in the skeletal system, the phenomenon of contact between the thigh and the lower thigh and between the thigh and the kneecap. The model was used to simulate the movement of the knee. The proposed threedimensional model of the knee has allowed to analyze the distribution of forces and moments acting on the parts of the joint. The results are illustrated in the graphs and discussed.

Źródło:

TTS Technika Transportu Szynowego; 2013, 10; 603-608, CD
1232-3829
2543-5728

Pojawia się w:

TTS Technika Transportu Szynowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

The description of the human knee as four-bar linkage

Autorzy:

Dathe, H.
Gezzi, R.
Fiedler, Ch.
Kubein-Meesenburg, D.
Nägerl, H.

Powiązania:

https://bibliotekanauki.pl/articles/307351.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

staw kolanowy
anatomia
kinematyka kolana
human knee
anatomy
knee kinematics
four-bar linkage
analytical description

Opis:

Purpose: We investigate the dependence of the kinematics of the human knee on its anatomy. The idea of describing the kinematics of the knee in the sagittal plane using four-bar linkage is almost as old as kinematics as an independent discipline. We start with a comparison of known four-bar linkage constructions. We then focus on the model by H. Nägerl which is applicable under form closure. Methods: We use geometry and analysis as the mathematical methods. The relevant geometrical parameters of the knee will be determined on the basis of the dimensions of the four-bar linkage. This leads to a system of nonlinear equations. Results: The four-bar linkage will be calculated from the limits of the constructively accessible parameters by means of a quadratic approximation. Conclusions: By adapting these requirements to the dimensions of the human knee, it will be possible to obtain valuable indications for the design of an endoprosthesis which imitates the kinematics of the natural knee.

Źródło:

Acta of Bioengineering and Biomechanics; 2016, 18, 4; 107-115
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Comparative efficacy of kneading massage and pulsed mode ultrasound in the management of chronic knee osteoarthritis

Autorzy:

O. Ojoawo, Adesola
Abiodun Fatai, Wasiu

Powiązania:

https://bibliotekanauki.pl/articles/2040133.pdf

Data publikacji:

2020-12-30

Wydawca:

Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego

Tematy:

kneading massage
knee osteoarthritis
pulsed ultrasounds

Opis:

Introduction. Osteoarthritis of the knee is the most common presentation of osteoarthritis with prevalence between 12% and 35% of general population and is considered the leading cause of musculoskeletal disability in the elderly population worldwide. Aim. The study compared efficacy of kneading massage and pulsed ultrasound on pain, joint stiffness and difficulty in knee osteoarthritis (KOA). Material and methods. Fifty subjects with radiological evidence of KOA participated in the study. They were randomly allocated into kneading massage group (KMG) (25) and Ultrasound group (USG) (25). KMG received kneading massage for 7 minutes while USG received pulsed mode ultrasound for 15 minutes. Treatment was twice in a week for six weeks. Pain intensity (PI), joint stiffness and difficulty were assessed pre, 3rd and 6th weeks of treatment session with semantic differential scale and WOMAC. The data were analyzed using descriptive and inferential statistics, alpha level was set at 0.05 Results. There was a significant difference in present PI (F=11.45,P=0.001) and stiffness (F= 11.32, P=0.003) in USG. There was a significant reduction in PI (F=7.95, P=0.001) and joint stiffness (F=8.86, P=0.003) in KMG. At the 6th week, there was a significant differences in PI (t=12.23,P=0.000) and stiffness (t=8.08, P=0.000) when USG (3.00+0.4, vs 7.14+ 1.49) was compared with KMG (3.16+0.5 vs 7.50+1.5). Conclusion. Ultrasound (US) and kneading massage (KM) reduced PI and joint stiffness of KOA effectively; however US reduced PI than KM while KM reduces joint stiffness than US.

Źródło:

European Journal of Clinical and Experimental Medicine; 2020, 4; 275-280
2544-2406
2544-1361

Pojawia się w:

European Journal of Clinical and Experimental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Computer Aided Design and Structural Analysis of the Endoprosthesis of the Knee Joint

Autorzy:

Zubrzycki, J.
Karpiński, R.
Górniak, B.

Powiązania:

https://bibliotekanauki.pl/articles/118225.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

knee joint
endoprosthesis
finite elements analysis

Opis:

The paper presents results of the preliminary structural analysis of model of the endoprosthesis of the knee joint. Basics of anatomy and biomechanics of the knee joint were introduced. Based on data from computed tomography, the model of knee joint was constructed. The prototype of the endoprosthesis of the knee joint was designed. After determining physical properties of structural materials, the Finite Elements Analysis of the model was conducted under various load conditions. Finally the results of analysis are presented.

Źródło:

Applied Computer Science; 2016, 12, 2; 84-95
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

BIomechanical aspects of artificial joint implantation in a lower limb

Autorzy:

Będziński, R.
Bernakiewicz, M.
Ścigała, K.

Powiązania:

https://bibliotekanauki.pl/articles/280285.pdf

Data publikacji:

1999

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

biomechanics
implantation
hip joint
knee joint

Opis:

One of the most important trends in engineering biomechanics is experimental and numerical analysis of the stress and strain state existing in organs subject to a heavy load; e.g., the knee and hip joints. Clinical tests experimental and numerical studies on design of implants replacing damaged organs are also of crucial importance in development of biomechanics. The research is focused on determination of loads, experimental techniques as well as on simplifications assumed in measurements and applied models. The conducted investigations were concerned with estimation of mechanical behaviour of hip and knee implants after arthoplasty. The experimental tests on both the real objects and models were performed. Numerical simulation was made by using the finite element method. The tests have proved that from the biomechanical point of view proper selection of endoprothesis is of crucial importance for achieving positive long-term results of alloplasty.
Jednym z najważniejszych kierunków badań w dziedzinie biomechaniki inżynierskiej jest doświadczalna i numeryczna analiza stanu odkształceń i naprężeń w organach ludzkich poddanych znacznym obciążeniom, jak chociażby staw biodrowy i kolanowy. Badania kliniczne, doświadczalne i numeryczne poświęcone konstrukcji elementów zastępujących uszkodzone elementy ciała ludzkiego stanowią jeden z najważniejszych kierunków biomechaniki. Dyskusje na tym tle skoncentrowane są na problemach beterminacji występującego stanu obciążenia, stosowanych technik pomiarowych oraz uproszczeń warunków pomiaru i przyjmowanych modeli. Przeprowadzone badania poświęcone zostały ocenie mechanicznej współpracy sztucznych elementów stawu biodrowego i kolanowego w warunkach modelowych, jak i metodą symulacji numerycznej, metodą elementów skończonych. Badania udowodniły duże znaczenie prawidłowej selekcji endoprotez z punktu widzenia biomechaniki układu na długoterminowe powodzenie alloplastyk.

Źródło:

Journal of Theoretical and Applied Mechanics; 1999, 3; 455-479
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Histological aspects of whole-body vibration in the knee remobilization of Wistar rats

Autorzy:

da Costa, Juliana Roncini Gomes
Tavares, Alana Ludemila de Freitas
Bertolini, Gladson Ricardo Flor
Wutzke, Maria Luiza Serradourada
Boaro, Carolina De Toni
Rodriguez, Diego Francis Saraiva
Costa, Rose Meire
Ribeiro, Lucinéia de Fátima Chasko

Powiązania:

https://bibliotekanauki.pl/articles/2054522.pdf

Data publikacji:

2022-06-30

Wydawca:

Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego

Tematy:

articular cartilage
knee
synovial membrane
vibration

Opis:

Introduction and aim. The knee is one of the joints where immobilization is most used, however, it can cause morphological changes in the joint tissues and is a challenge to be overcome during rehabilitation. Whole-body vibration (WBV) is capable of generating repetitive oscillatory movements, which cause mechanical stimuli that interfere with tissue plasticity. The aim of this study was to analyze the knee morphology of Wistar rats submitted to remobilization with WBV. Material and methods. 32 male rats were used, divided into four groups (n=8): Control Group (G1), Immobilization Group (G2), Immobilized Group and Free Remobilization (G3), Remobilized Group with WBV (G4). For immobilization, a plastered apparatus was used for 15 days. G3 and G4 carried out free remobilization or with WBV, respectively, for 2 weeks. The knee joints were processed for light microscopy. Results. The WBV led to a reduction in the inflammatory infiltrate in the articular cavity and greater presence of adipocytes in the subintima of the synovial membrane. Conclusion. Remobilization with WBV induced a better tissue response in the synovial membrane when compared to free remobilization.

Źródło:

European Journal of Clinical and Experimental Medicine; 2022, 2; 159-166
2544-2406
2544-1361

Pojawia się w:

European Journal of Clinical and Experimental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Symulacje komputerowe rozkładu naprężeń w polietylenowej wkładce endoprotezy stawu kolanowego w zależności od zmiany jej grubości w efekcie zużycia i wytarcia
Computer simulations of stress distribution in the tibial insert of endoprosthesis knee joint the results of the decline thickness in the effect of wear

Autorzy:

Jurkojc, J.
Gąsiorek, D.
Iwaniak, A.
Wojciechowski, P.
Kusz, D.

Powiązania:

https://bibliotekanauki.pl/articles/284091.pdf

Data publikacji:

2007

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

endoprotezy stawu kolanowego
endoprosthesis knee joint

Opis:

W pracy wyznaczono przestrzenny rozkład stanu naprężeń w polietylenowej wkładce endoprotezy stawu kolanowego. Do obliczeń wykorzystano model wkładki uzyskany w wyniku zeskanowania z użyciem skanera 3-D, standardowej endoprotezy kolana używanej do implantacji. W obliczeniach założono, że wkładka jest równomiernie obciążana na obie części: prawą i lewą, a wartość przyłożonego obciążenia została określona dla osoby o masie całkowitej 85 kg. Symulacje rozkładu naprężeń przeprowadzono dla różnych grubości wkładki.
The paper presents three-dimensional stress distribution in the tibial insert endoprothesis knee joint. For simulations was used a model of tibial insert scanned with the use of a 3D scanner, a standard knee endoprothesis knee joint used in implantations. It was assumed in calculation that the tibial insert is distributed on both: right and left sides, and applied load was determined fora person of 85 kg. Simulations of stress distribution was done for different thickness of the tibial insert.

Źródło:

Engineering of Biomaterials; 2007, 10, no. 65-66; 42-45
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Effects of Integrated Therapeutic Exercises on Pain and Disability in Medial Knee Osteoarthritis

Autorzy:

Raghav, Sumit
Singh, Anshika
Mani, Suresh
Srivastava, Anirudh
Kumar, Mukul

Powiązania:

https://bibliotekanauki.pl/articles/28761968.pdf

Data publikacji:

2023

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

knee osteoarthritis
integrated exercises
pain
disability

Opis:

The purpose of this study was to compare the effect of quadriceps isometric exercises along with hip abductors isometric exercises as integrated exercise with quadriceps exercises in reducing pain, disability in medial knee osteoarthritis. The Total of 54 patients (both male and female) were recruited in this study but on the basis of inclusion and exclusion criteria, only 32 were included in this study. Womac index was opted as outcome measures to collect the data of pain, disability and functional limitation. Participants were randomly assigned to integrated exercise group; (n = 16) (mean age 52) who performed exercises [Quadriceps isometric along with hip abductor isometric exercises] and quadriceps isometric exercises group (n = 16) (mean age 49) performed for 3 weeks. 32 patients were analyzed and the effect of integrated exercises [Quadriceps isometric along with hip abductor isometric exercises] showed a statistically significant difference in pain, disability and functional limitation (p < 0.000). Total duration to collect the pre and post data of pain, disability and functional limitation was 3 weeks. 3 weeks of exercise protocol was effective in both groups in terms of reducing pain and disability but integrated exercises were found to be more effective than quadriceps exercise in improving the pain, disability and functional limitation over the time at the level of significance.

Źródło:

Central European Journal of Sport Sciences and Medicine; 2023, 44; 55-62
2300-9705
2353-2807

Pojawia się w:

Central European Journal of Sport Sciences and Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Anatomical knee endoprostheses – does a better-fit lead to better outcomes? A review article
Endoprotezy anatomiczne stawu kolanowego – czy lepsze dopasowanie to lepsze wyniki? Praca przeglądowa

Autorzy:

Maciąg, Bartosz Michał
Budzińska, Martyna
Żarnovsky, Krystian
Adamska, Olga
Stolarczyk, Artur

Powiązania:

https://bibliotekanauki.pl/articles/2186040.pdf

Data publikacji:

2023-03-31

Wydawca:

Wydawnictwo Exemplum

Tematy:

total knee arthroplasty
anatomic knee prosthesis
morphometric implants
całkowita endoprotezoplastyka stawu kolanowego
implanty anatomiczne
implanty morfometryczne

Opis:

Introduction. Total knee replacement is the most efficient method of treating end-stage osteoarthritis of the knee joint. The surgery aims to relieve patients of pain, restore range of motion and improve patients’ quality lives. Prostheses design is still being modified and improved through cooperation between orthopaedic surgeons and engineers. Some of the most modern solutions aimed to fit native patients’ anatomy as much as possible are anatomic knee systems. Materials and methods. The literature was reviewed, and articles related to the subject were researched. Therefore, publications including keywords such as total knee replacement, anatomic implants and morphometric implants were searched in the PubMed, Cochrane and Google Scholar databases. All data was selected and verified individually. Analysis and synthesis of studies were prepared separately. Results. Many studies describe the advantages of anatomic prostheses over standard prostheses. Anatomical prostheses have a broader range of available sizes, thus providing better coverage of the distal end of the femur and the proximal tibia, allowing for the resection of less bone tissue, which is beneficial in the event of a possible need for a future revision of the endoprosthesis, enabling better selection of the tibial element rotation by better matching to the tibial plateau, which affects the alignment and patellar movement, and the structure of the trochlear geometry that also affects the patellar movement and reduces the risk of trochlear dysplasia. Conclusions. Anatomical implants enable better alignment of the prosthesis elements and the native femoral and tibial bone. Using these models makes it possible to obtain a greater range of motion and, consequently, improved functional outcomes compared to non-anatomical ones. It also enables less bone resection and better radiological outcomes.
Wstęp. Endoprotezoplastyka całkowita stawu kolanowego jest uznawana za najskuteczniejszą metodę leczenia zaawansowanej choroby zwyrodnieniowej stawu kolanowego. Celem operacji jest zmniejszenie bólu kolan, przywrócenie zakresu ruchu i poprawa jakości życia pacjentów. Projekt protez jest wciąż modyfikowany i udoskonalany dzięki współpracy ortopedów i inżynierów. Jednymi z najnowocześniejszych rozwiązań mających na celu maksymalne dopasowanie do anatomii pacjentów są anatomiczne systemy kolanowe. Materiał i metody. Dokonano przeglądu literatury i przeanalizowano artykuły związane z tą tematyką. W bazach PubMed, Cochrane i Google Scholar przeszukano publikacje zawierające słowa kluczowe takie jak całkowita endoprotezoplastyka stawu kolanowego, implanty anatomiczne, implanty morfometryczne. Wszystkie dane zostały dobrane i zweryfikowane indywidualnie. Analizę i syntezę badań przygotowano osobno. Wyniki. Wiele artykułów opisuje przewagę protez anatomicznych nad modelami protez standardowych. Protezy anatomiczne posiadają szerszy wachlarz dostępnych rozmiarów przez co oferują lepsze pokrycie dalszego końca kości udowej oraz bliższego piszczelowej, pozwalają na resekcję mniejszej ilości tkanki kostnej co jest korzystne w przypadku możliwej w przyszłości konieczności rewizji endoprotezy, umożliwiają lepsze dobranie rotacji elementu piszczelowego przez lepsze dopasowanie do plateau piszczeli co wpływa na alignment i tor ruchu rzepki, a także budowa bruzdy dla rzepki wpływa korzystnie na tor ruchu rzepki i zmniejsza ryzyko rozwoju dysplazji. Wnioski. Implanty anatomiczne umożliwiają lepsze dopasowanie elementów protezy do natywnej struktury kości. Dzięki zastosowaniu tych modeli możliwe jest uzyskanie większego zakresu ruchu w stawie, a w rezultacie lepszych wyników funkcjonalnych. Implanty anatomiczne pozwalają także na mniejszą resekcję tkanki kostnej.

Źródło:

Chirurgia Narządów Ruchu i Ortopedia Polska; 2023, 88, 1; 13-16
0009-479X
2956-4719

Pojawia się w:

Chirurgia Narządów Ruchu i Ortopedia Polska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

The return to professional activity patients treated surgically due to advanced gonarthrosis

Autorzy:

Drobniewski, Marek
Synder, Marek
Krasińska, Magdalena
Sibiński, Marcin
Borowski, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/2095506.pdf

Data publikacji:

2021-09-03

Wydawca:

Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi

Tematy:

total knee arthroplasty
gonarthrosis
return to work
clinical and radiological outcome
Knee Society Score
Kellgren-Lawrence classification

Opis:

ObjectivesThe goal of this work is to analyze the issue of return to professional activity by working-age patients who have been treated surgically with total knee arthroplasty (TKA) due to gonarthrosis.Material and MethodsOverall, 88 working-age patients were examined, with a total of 91 TKA procedures performed due to advanced gonarthrosis. The average age of the patients was 54.2 years for women and 58.1 years for men. A modified Knee Society Score scale was used to compile the results of the clinical trial. The Kellgren-Lawrence classification was used to assess preoperative radiographs. Postoperative radiographs evaluated the position of the endoprosthesis of both the femoral and tibial components in the anteriorposterior and lateral upright projections. The obtained results were subjected to statistical analysis.ResultsIn the preoperative assessment, both the clinical and radiological results obtained were unfavorable in all cases. Throughout the observation period of approximately over 3.8 years, a very good result was noted in 65 cases (71.4%), a good result in 20 cases (22%), and a satisfactory result in 6 cases. There were no bad results. The average improvement on the Visual Analogue Scale was 6.5 pts. The radiological assessment did not reveal any radiological symptoms of the aseptic loosening of the endoprosthesis, simultaneously concluding that each time the endoprosthesis components were properly seated. Only 53 (58.3%) of the examined patients were professionally active before the surgery. After completing the treatment, 46 (50.5%) of all patients returned to work, in favor of intellectual workers. The average duration of sick leave was 136.2 days, and rehabilitation allowance was granted in 19 cases.ConclusionsFirstly, in working-age patients, TKA is a valuable method for surgical treatment of advanced gonarthrosis of varying etiology. Secondly, most of the patients who worked before the surgery returned to performing work in the position held and on the same full-time equivalent basis.

Źródło:

International Journal of Occupational Medicine and Environmental Health; 2021, 34, 5; 617-628
1232-1087
1896-494X

Pojawia się w:

International Journal of Occupational Medicine and Environmental Health

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Balance evaluation after Russian current on the femoral rectus of healthy individuals118-122

Autorzy:

Czarnobaj, Carina Casiraghi
Folarosso, Hellen Cristina
Picagevicz, Maria Gabriela
Lima, Natália de
Nakayama, Gustavo Kiyosen
Bertolini, Gladson Ricardo Flor

Powiązania:

https://bibliotekanauki.pl/articles/454838.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego

Tematy:

knee
physical therapy
proprioception
range of motion

Opis:

Introduction. A technique used in physiotherapy, but still underinvestigated, is the use of the Russian current as an aid in the improvement of balance. Aim. To verify the influence of the Russian current applied to the rectus femoris on balance in healthy and sedentary individuals. Material and methods. A cross-sectional clinical trial was performed at the Universidade Estadual do Oeste do Paraná – Unioeste, in the city of Cascavel – PR. The sample consisted of 20 healthy female subjects aged between 18 and 25 years, equally divided into two groups where group 1 was placebo and group 2 treatment. Initially, the proprioceptive evaluation was performed by means of a functional test (the Star Excursion Balance Test (SEBT)) and stabilometry using a baropodometer. Russian current was then applied to the femoral rectum of both limbs simultaneously for 2 weeks, 5 days a week. Results. No significant differences were found analyzing the variables, but the elevated effect size points to clinical relevance of Russian Current in functional assessment. Conclusion. The use of the Russian current in the rectus femoris did not present significant alteration on balance.

Źródło:

European Journal of Clinical and Experimental Medicine; 2019, 2; 118-122
2544-2406
2544-1361

Pojawia się w:

European Journal of Clinical and Experimental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Numerical analysis of stress distribution generated in spherical polyethylene inserts by knee joint endoprotheses’ sleds

Autorzy:

Nabrdalik, Marcin
Sobociński, Michał

Powiązania:

https://bibliotekanauki.pl/articles/779682.pdf

Data publikacji:

2019

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

polyethylene UHMWPE
FEM
endoprosthesis of knee joint

Opis:

The paper presents analysis of stress distribution in the friction node of knee joint endoprosthesis where sleds are made of various titanium alloys and CoCrMo cooperate with spherical polyethylene inserts. Currently used titanium alloys consists of Nb, Ta, Zr or Mo and with lesser value of Young’s modulus than Ti6Al4V alloy, or steel CoCrMo, which significantly varies from other metal materials. The obtained results make it possible to indicate the “weak points” of the accepted solution, and thus counteract the subsequent effects resulting from premature wear of endoprosthesis elements. The analysis was conducted with numerical method of ADINA System 8.6. The Finite Elements Method allowed to compute and present stress distribution quickly in all elements of the model.

Źródło:

Polish Journal of Chemical Technology; 2019, 21, 2; 1-5
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Effect of clinic-based and telemonitored home-based intervention on pain intensity, functioning and quality of life in patients with knee osteoarthritis

Autorzy:

Ojoawo, Adesola Ojo
Odesanya, Oluwaseun
Kunuji, Kayode
Mbada, Chidozie Emmanuel
Adedeji, Oluwafemi Olusesan

Powiązania:

https://bibliotekanauki.pl/articles/38695724.pdf

Data publikacji:

2024-03-30

Wydawca:

Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego

Tematy:

clinical-based
knee osteoathritis
telemonitored
tera-band

Opis:

Introduction and aim. The study assessed and compared the effects of clinic-based and telemonitored home-based interventions on pain intensity, functioning and quality of life in patients with knee osteoarthritis (KOA). Material and methods. Forty-two patients were recruited purposely and randomly allocated into clinic-based (CBG) and telemonitored home-based group (THG) equally. The CBG and THG received isometric exercises to strengthen the quadriceps and hamstring muscles using theraband. THG received the exercise at home they were monitored on phone thrice in a week, while the CBG did the exercise in the hospital. The subjects performed four sets of eight repetitions three days in a week for eight weeks. Pain intensity, functioning and health related quality of life (HRQoL) were assessed at pretreatment, 6th and 8th week of intervention. Data was analyzed with descriptive and inferential statistics. Alpha level was set at 0.05. Results. There was a significant reduction (p<0.001) among pre-treatment, 6th and 8th week intervention in pain intensity, functional pain intensity and quality of life of CBG and THG. CBG showed significant reduction (p<0.001) in pain intensity, function and increase in HRQoL than THG at 8th week. Conclusion. Clinic-based and telemonitored home-based interventions were both effective in the management of KOA but clinic-based intervention was better than telemonitored home-based intervention.

Źródło:

European Journal of Clinical and Experimental Medicine; 2024, 22, 1; 73-81
2544-2406
2544-1361

Pojawia się w:

European Journal of Clinical and Experimental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Plantar pressure analysis of above-knee amputee with a developed microprocessor-controlled prosthetic knee

Autorzy:

Cao, W.
Yu, H.
Meng, Q.
Li, S.

Powiązania:

https://bibliotekanauki.pl/articles/306983.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

ciśnienie podeszwowe
proteza stawu kolanowego
analiza chodu
plantar pressure
above-knee amputee
microprocessor-controlled
prosthetic knee
gait analysis

Opis:

Human gait motion analysis was one useful method for lower limb prosthesis study. The most often measured parameters were plantar pressure, kinetic and kinematic parameters. It was indispensable for prosthetic knee design and performance assessment. The aim of this study was to analysis the plantar pressure in traumatic above-knee amputee equipped with a developed microprocessor-controlled prosthetic knee. Methods: The maximum force of forefoot and rearfoot, the average vertical reaction force and pressure and the centre of pressure (COP) offset trajectories of ten above-knee amputees under different walking speeds were obtained. Results: Both forefoot and rearfoot force were bigger in intact leg than prosthetic leg. As the speed increased, the pressure increased in both sides. Forefoot bore more pressure than rearfoot in both legs. The average vertical pressure and force both increased along with the increase of speed. The force and pressure of intact side were always bigger than the prosthetic side. The trend of COP and gait line of the prosthetic and intact side had no significant difference. The length of the gait line of prosthetic side was greater than the intact side. Conclusions: The results of this study exhibited reduced plantar pressure in the prosthetic side. The typical butterfly diagrams were produced during different walking speeds. It indicated that the stability of the microprocessor-controlled prosthetic knee could be guaranteed.

Źródło:

Acta of Bioengineering and Biomechanics; 2018, 20, 4; 33-40
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Two-stage Reimplantation in Infected Total Knee Arthroplasty by Using Resterilized Femoral and Tibial Components with a New Polyethylene Insert: Report of 4 Cases with at Least 15 Years’ Follow-up

Autorzy:

Öztürk, Alpaslan
Çevik, Nazan
Akalın, Yavuz
Çetin, Oğuz
Avci, Özgür
Kaya, Ali Ömer

Powiązania:

https://bibliotekanauki.pl/articles/28411803.pdf

Data publikacji:

2021-12-20

Wydawca:

Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica

Tematy:

total knee arthroplasty
periprosthetic infection
articulating spacer
complications

Opis:

Background. This study evaluates 15 years’ results of the implantation of autoclaved femoral and tibial prosthesis components together with a new same brand polyethylene insert which were used as a temporary articulating spacer in patients with periprosthetic infection of total knee arthroplasty (TKA) in a two-stage reimplantation procedure in 6 patients.  Material and methods. The femoral and tibial prostheses of 6 patients with deep chronic periprosthetic infection of TKA who underwent elective two-stage exchange arthroplasty were autoclaved and reinserted with a new polyethylene insert of the same brand and bone cement mixed with tecoplanin in 2004. Results. Four patients were followed for 15 years. They were all female and between 47-70 years old. The infectious agent was meticillin-resistant Staphylococcus aureus (MRSA) in 3 and coagulase negative Staphylococcus in one patient. Patients were invited for second stage reimplantation, but they refused to undergo the second stage. Three of them had their second stage reimplantation after 15, 13 and 10 years while one patient was reinfected after 5 years, in 2009, and arthrodesis was performed. They were all happy with the result and infection free at last follow-up.  Conclusions. 1. Regarding the results of our patients, reinsertion of autoclaved femoral and tibial prostheses together with a new same brand polyethylene insert with teicoplanin loaded bone cement can be used cautiously in the management of periprosthetic deep infection of TKA. 2. That is because patients might not want the second stage reimplantation. 3. We believe that the refusal of patients to undergo the surgery shows that the single-stage treatment is effective.

Źródło:

Ortopedia Traumatologia Rehabilitacja; 2021, 23(6); 411-416
1509-3492
2084-4336

Pojawia się w:

Ortopedia Traumatologia Rehabilitacja

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Knee joint position sense in physically active patients after ACL reconstruction

Autorzy:

Pawlak, Dawid
Wysota, Aleksandra
Furmanek, Mariusz
Ficek, Krzysztof
Juras, Grzegorz

Powiązania:

https://bibliotekanauki.pl/articles/1054848.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

anterior cruciate ligament
joint position sense
knee
reconstruction

Opis:

The term “proprioception” is defined as the conduction of sensory information deriving from proprioceptors that have an impact on conscious sensations, posture and trans-segmental sense. An ACL injury may lead to functional knee joint instability. According to research, this may result in impaired movement sensation and joint position. The purpose of this study was to evaluate the joint position sense (JPS) in patients before arthroscopic ACL reconstruction and 5 months after the surgery. The examinations were conducted in a group of twelve specifically selected male patients. The examination procedure consisted of JPS measurement in both lower limbs (the operated and the healthy one) during active extension in a range of angles: 30, 45, 60°. The level of significance was: p < 0.05. The analysis of variance performed for repeated measurements (ANOVA) did not indicate any statistically significant differences of JPS in comparisons made between the operated and the healthy limb. Statistical values for the absolute, relative, and variable errors were p = 0.7684, p = 0.1546, p = 0.5694 respectively. The obtained results do not indicate any limitation of proprioception in patients with ACL injury before the intervention or half a year later.

Źródło:

Central European Journal of Sport Sciences and Medicine; 2014, 7, 3; 65-72
2300-9705
2353-2807

Pojawia się w:

Central European Journal of Sport Sciences and Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Assessment of the function of the knee after rehabilitation in patients with gonarthrosis - the KOOS scale

Autorzy:

Krawczyk – Suszek, Marlena
Martowska, Blanka
Cygan, Natalia
Mierzwińska, Aleksandra
Maciejewski, Ryszard
Bednarski, Jerzy

Powiązania:

https://bibliotekanauki.pl/articles/1071322.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

KOOS scale
Osteoarthritis (OA)
VAS scale
knee
rehabilitation

Opis:

Osteoarthritis (OA) of the knee joints is nowadays a significant medical and economic problem in the world. The percentage of people diagnosed with degeneration of the knee joint is increasing rapidly. Not only does it cause negative social consequences, but also generates large treatment costs. The treatment consists in taking preventative measures and educating patients, as well as pharmacological therapy, physiotherapy and, as a last resort – surgery. Suitable and comprehensive measures can decrease symptoms of gonarthrosis. The research was conducted among 110 patients diagnosed with OA of the knee joints in one of the rehabilitation clinics in Podkarpacie voivodeship. A self-construction questionnaire, the KOOS scale and the VAS scale were the research tools. The respondents were informed about the anonymity of the survey. The research was carried out twice before and after the rehabilitation. Among the respondents, the highest percentage of people with gonarthrosis involved women (74.5%). Overweight and obesity were important factors correlating with the occurrence of gonarthrosis. The cryotherapy (66.4%), exercise in relief (42.7%), followed by laser therapy, magnetronics and individual exercises were considered the most helpful treatments. Electrotherapy and massage were considered as the least effective. Having analysed the result of the KOOS questionnaire and the VAS scale provided to the patients before and after the treatment, the positive effects of physiotherapy have been noted. The patients have noticed improvement in daily activities, quality of life, severity of symptoms and pain relief (p <0.05). The research indicates that physiotherapy is an effective measure, therefore it should be included in the treatment of patients diagnosed with OA.

Źródło:

World Scientific News; 2019, 122; 1-11
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Kinesio Taping and Patellofemoral Pain Syndrome: A Systematic Review

Autorzy:

López Aguilar, Beatriz
Merino-Marbán, Rafael

Powiązania:

https://bibliotekanauki.pl/articles/1055080.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

chondromalacia patella
elastic tape
kinesio tape
knee pain

Opis:

Patellofemoral pain syndrome occurs when there is a degeneration of the patellar cartilage between both bone surfaces of the femur and the patella. Its characteristic symptom is anterior knee pain that worsens when this joint is moved. The aim of the study was to determine the effectiveness of kinesio taping on patellofemoral pain syndrome through the analysis of published scientific studies up until June 2014. A literature search was carried out in the following electronic databases: Scopus, Sport Discus, PEDro, Cochrane Library Plus, Embase, Web of Science and Science Direct to locate studies that were relevant to this review. Out of 159 articles examined, after eliminating duplicates and upon completion of reading them, the review was finally reduced to 12 articles. After reviewing the literature regarding the effectiveness of kinesio taping on the improvement of knee pain, we concluded there is insufficient scientific evidence to support this theory. It is an inexpensive technique that can be combined with other therapies and has no side effects, but there is controversy in the analyzed studies on its possible benefits on the patellofemoral pain syndrome. For this reason, it is essential to carry out further methodologically sound research regarding the usefulness of kinesio taping in the treatment of this syndrome.

Źródło:

Central European Journal of Sport Sciences and Medicine; 2015, 9, 1; 47-54
2300-9705
2353-2807

Pojawia się w:

Central European Journal of Sport Sciences and Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

The Incidence of Knee Pain Among Healthy People Engage in Tai Chi and Jogging as Measured by the Western Ontario Osteoarthritis and McMaster Universities Arthritis Index (WOMAC)

Autorzy:

Sutjiadi, Shelly
Haryono, Ignatio Rika

Powiązania:

https://bibliotekanauki.pl/articles/2036809.pdf

Data publikacji:

2020-08-15

Wydawca:

Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica

Tematy:

Jogging
Knee Pain
Osteoarthritis
OA index
Tai Chi

Opis:

Background. Exercise has been recognized to improve functional limitation and pain in knee osteoarthritis (OA). However, exercise has also been reported to induce exercise-related knee pain. This study aimed to compare the effect of Tai Chi and jogging on knee pain in healthy and related factors. Material and methods. This cross-sectional study involved male and female 180 participants aged 40-60-years. The participant consisted of Tai Chi (n=60), jogging (n= 60), and sedentary (n=60) as control. Weight height and body mass index (BMI) were measured. The pain was evaluated using The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). Risk factors of knee OA were included. ANOVA followed with post hoc test, Chi-square, Pearson and Spearman correlation, and logistic regression were applied to compute statistical analysis tests. Results. There are 4 participants (2.5%) with the WOMAC score index at high risk of knee OA. Seventy-six participants (63%) engaged in Tai Chi and jogging had knee pain. The possible risk factors of knee pain, which significantly correlated with knee pain were age, weight, BMI, family history of rheumatoid arthritis, and spine alignment. A linear regression indicated both Tai Chi and jogging did not significant different compared to control (OR 1.23, CI 95% 0.59-2.25, p=0.58 and OR 0.69, CI 95% 0.32-1.47, p=0.34, respectively) Conclusion. The incidence of knee pain in Tai Chi and jogging is quite high. However, the WOMAC score index is mostly normal. Tai Chi tends to aggravate knee pain than jogging in people with risk factors.

Źródło:

Polish Journal of Sports Medicine; 2020, 36(1); 1-6
1232-406X
2084-431X

Pojawia się w:

Polish Journal of Sports Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Modelowanie endoprotezy stawu kolanowego
Designing total knee endoprosthesis

Autorzy:

Chruścicka, N.
Ciepielowski, D.
Łagan, S.

Powiązania:

https://bibliotekanauki.pl/articles/98716.pdf

Data publikacji:

2012

Wydawca:

Politechnika Śląska. Katedra Biomechatroniki

Tematy:

staw kolanowy
endoproteza
modelowanie
knee joint
endoprosthesis
modelling

Źródło:

Aktualne Problemy Biomechaniki; 2012, 6; 15-20
1898-763X

Pojawia się w:

Aktualne Problemy Biomechaniki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Correlations among plasma silicon, magnesium and calcium in patients with knee osteoarthritis - analysis in consideration of gender

Autorzy:

Musik, I.
Kurzepa, J.
Luchowska-Kocot, D.
Kocot, J.
Paździor, M.
Polz-Dacewicz, M.
Kiełczykowska, M.

Powiązania:

https://bibliotekanauki.pl/articles/2082056.pdf

Data publikacji:

2018

Wydawca:

Instytut Medycyny Wsi

Tematy:

osteoarthritis of knee
silicon
calcium
magnesium
males
females

Opis:

Introduction and objective. Osteoarthrits (OA) is a complex, chronic disorder of cartilage and bone, related to homeostasis of bioelements. The current study aimed at evaluation of correlations between plasma silicon, magnesium and ionized calcium in OA patients in consideration to gender. Materials and method. The study comprised 59 patients aged 69.5±9.0 years (18 males aged 66.8±9.2; 41 females aged 70.7±8.8), admitted to the Trauma and Orthopaedic Ward of the Independent Public Health Care Centre in Łęczna, Poland, due to OA and qualified to surgery. Control group consisted of 19 subjects without OA (54.5±8.6 years; 10 males aged 41.3±9.3; 9 females aged 69.1±14.9). Plasma concentrations of silicon and magnesium (spectrophotometric methods) and ionized calcium (potentiometric method) were determined. Results. Silicon in OA patients was significantly increased vs. control. In OA males and OA females, silicon was enhanced vs. the respective controls, but it was statistically significant only in males. Magnesium in OA patients was not significantly different from control group. In females, a significant decrease vs. the respective control was observed. No significant differences were observed in the case of ionized calcium. Positive correlations between silicon and magnesium in healthy control, both in the whole group and in male and female subgroups, were noted, while no such effect was observed in OA subjects. Conclusions. The results might suggest some connection between higher OA incidence in women and the depleted magnesium in the organism. Silicon increase in OA patients, especially in men, may indicate its intense metabolism during the articular inflammatory process, likely dependent on sex hormones. It remains open whether the plasma Si increase is the effect or cause of OA.

Źródło:

Annals of Agricultural and Environmental Medicine; 2019, 26, 1; 97-102
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 28.

Tytuł:

Zastosowanie własnej skali oceny sprawności sensomotorycznej u pacjentów z gonartrozą i po endoprotezoplastyce stawu kolanowego
Usefulness of a new sensorimotor control scale in patients with gonarthrosis and after total knee replacement

Autorzy:

Słupik, Anna
Kowalski, Marcin
Białoszewski, Dariusz

Powiązania:

https://bibliotekanauki.pl/articles/437600.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego

Tematy:

propriocepcja
endoprotezoplastyka stawu
kolanowego
aloplastyka
choroba zwyrodnieniowa sensomotoryka
kontrola sensomotoryczna
proprioception
total knee replacement
arthroplasty
knee osteoarthritis
sensorimotor system
sensorimotor control

Opis:

Wstęp. Coraz większą uwagę w praktyce klinicznej zwraca się na ocenę sprawności sensomotorycznej jako istotnego czynnika determinującego powrót funkcji. Celami niniejszej pracy były: ocena wpływu uszkodzeń związanych z zaawansowaną gonartrozą na zmianę czucia głębokiego i kontroli sensomotorycznej stawu kolanowego, porównanie wyników uzyskanych we własnym teście kontroli sensomotorycznej z obiektywnymi metodami oceny czucia głębokiego, analiza zależności pomię- dzy poziomem czucia głębokiego i sprawnością układu sensomotorycznego a pomiarami stosowanymi w praktyce klinicznej. Materiał i metody. Ocenie poddano grupę osób zdrowych (grupa kontrolna, n=74), grupę pacjentów z chorobą zwyrodnieniową IV st. (grupa 1, n=67) oraz pacjentów po endoprotezoplastyce stawu kolanowego (grupa 2, n=62). Badanych oceniano z wykorzystaniem autorskiego Testu Kontroli Sensomotorycznej (TKS) oraz testu czucia pozycji stawu (JPS). Analizowano również wyniki uzyskane w skalach HSS Knee Score i Stafflstein-Score.Wyniki. W ocenie za pomocą TKS i JPS grupa kontrolna uzyskała wyniki na poziomie odpowiednio 4,9 pkt i 3,9°, natomiast grupa 2 3,7 pkt i 6,7° (p<0,005). W grupie 1 uzyskano 3,2 pkt w TKS, natomiast w JPS 8,2° w kończynie zdrowej i 10,2° w kończynie chorej. Wyniki tej grupy były istotnie gorsze niż grupy kontrolnej oraz grupy 2 (p<0,005). Wnioski. 1. Prezentowany własny test oceniający sprawność sensomotoryczną stawu kolanowego wydaje się obiektywnym i kompleksowym sposobem oceny sprawności kontroli sensomotorycznej stawu kolanowego u pacjentów z gonartrozą i po endoprotezoplastyce stawu kolanowego. 2. Wskazane są dalsze badania z wykorzystaniem autorskiego testu kontroli sensomotorycznej obejmujące próbę jego obiektywizacji z wykorzystaniem specjalistycznych narzędzi pomiarowych.
Introduction. The importance of sensorimotor control assessment as a crucial factor determining functional recovery is being increasingly appreciated in clinical practice. The aim of this study was to assess the inflence of damage associated with severe gonarthrosis on changes in proprioception and sensorimotor control of the knee, compare the results of a new sensorimotor control test developed by the authors with objective methods of proprioception assessment, and analyse the relation between the level of proprioception and sensorimotor system function and the measurements used in clinical practice. Material and methods. We studied a group of healthy persons (control group, n=74), patients with stage 4 knee osteoarthritis (group 1, n=67), and patients after total knee arthroplasty (group 2, n=62). The participants were assessed with a new sensorimotor control test (TKS) and a joint position sense test (JPS). Moreover, we analysed the patients’HSS knee scores and Stafflstein scores.results. In the Control Group, mean TKS and JPS test scores were 4.9 pts and 3.9°, respectively, while the respective results in group 2 were 3.7 pts and 6.7° (p<0.005). In group 1, the TKS score was 3.2 pts and the JPS test result was 8.2° in the unaffcted limb and 10.2° in the affcted limb. The results of this group were signifiantly worse than the scores achieved in the control group and group 2 (p<0.005). conclusions. 1. The new knee sensorimotor control test developed by the present authors appears to provide an objective and comprehensive method to evaluate sensorimotor control of the knee in patients with gonarthrosis and after total knee replacement. 2. Further studies of the new test are advised, including an objective evaluation of the test utilising specialised measuring tools.

Źródło:

Medical Review; 2015, 2; 95-103
2450-6761

Pojawia się w:

Medical Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Methods and measurements in radiation synovectomy with 90Y of knee joint dosimetry

Autorzy:

Kempińska, M.

Powiązania:

https://bibliotekanauki.pl/articles/147678.pdf

Data publikacji:

2008

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

Yttrium-90
dosimetry
synovectomy
radiation protection
gammacamera
knee joint

Opis:

Radioisotope synovectomy is based upon an yttrium-90 colloid injected into the knee joint (the usual injected activity ranges from 111 MBq to 222 MBq per joint). Execution of the procedure needs participation of a nuclear medicine specialist as well as an orthopedist or a rheumatologist and a technologist who prepares radiopharmaceuticals. All of these participants are exposed to ionizing radiation. The ionization doses for patients and personnel are dependent not only on the activity injected, but also on the method and process of injection as well as the radioactivity measurement procedure used. In the experiments performed, a significant influence of the biodistribution of the radioisotopic substance on the exposure results has been observed.

Źródło:

Nukleonika; 2008, 53, suppl. 1; 39-43
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Knee joint osteoarthritis diagnosis based on selected acoustic signal discriminants using machine learning

Autorzy:

Karpiński, Robert

Powiązania:

https://bibliotekanauki.pl/articles/2097441.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

acoustic emission
machine learning
osteoarthritis
knee joint
kinetic chain

Opis:

This paper presents the results of a preliminary study on simplified diagnosis of osteo-arthritis of the knee joint based on generated vibroacoustic processes. The analysis was based on acoustic signals recorded in a group of 50 people, half of whom were healthy, and the other half – people with previously confirmed degenerative changes. Selected discriminants of the signals were determined and statistical analysis was performed to allow selection of optimal discriminants used at a later stage as input to the classifier. The best results of classification using artificial neural networks (ANN) of RBF (Radial Basis Function) and MLP (Multilevel Perceptron) types are presented. For the problem involving the classification of cases into one of two groups HC (Healthy Control) and OA (Osteoarthritis) an accuracy of 0.9 was obtained, with a sensitivity of 0.885 and a specificity of 0.917. It is shown that vibroacoustic diagnostics has great potential in the non-invasive assessment of damage to joint structures of the knee.

Źródło:

Applied Computer Science; 2022, 18, 2; 71--85
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Kinematic analysis of instantaneous centre of rotation of prosthetic knee mechanisms

Autorzy:

Grodzka, Kinga
Sajewicz, Eugeniusz
Dziemianowicz, Marcin

Powiązania:

https://bibliotekanauki.pl/chapters/2215322.pdf

Data publikacji:

2022

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

knee prosthesis
instantaneous center of rotation
four-bar linkage

Opis:

The purpose of this work was to determine the influence of kinematic evidence, based on the trajectories of the instantaneous center of rotation (ICR) on the optimization of the functionality of selected prosthetic knee mechanisms. For the research 11 commercially used knees based on the articulated quadrilateral mechanism were used to visualize the operation of mechanisms with two methods: analytical and graphic. The generated paths were compared in terms of position changeability and shape. It was found that depending on the position of the ICR related to the axes of the mechanism, prosthetic knees obtained different level of stability and energy expenditure. The results have also shown that ICR point position and shapes of its trajectories are variable for particular classes of mechanisms. An analysis of the obtained results suggests that manipulation of the position of the instantaneous center of rotation by a suitable design of the linkages length of the mechanism enable to achieve the desired features, corresponding to the real needs of patients.

Źródło:

Advances in biomedical engineering; 55-70
9788367185400

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Design Resistance of Welded Knees in Steel Frames

Autorzy:

Krystosik, P.

Powiązania:

https://bibliotekanauki.pl/articles/104292.pdf

Data publikacji:

2018

Wydawca:

Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza

Tematy:

steel frame
knee joint
transverse stiffener
diagonal stiffeners
resistance

Opis:

The paper presents issues related to calculations of welded knee joints, in which the interconnected load-bearing elements, beams and columns, can be made from plate girders with slender webs. At the beginning, a typical knee joint of portal steel frame was characterized, along with presentation of calculations for the internal forces in characteristic zones of the knee, i.e. in tension, shear, and compression zone. Then, the checking procedures of resistance were presented in detail for each designated knee zone, paying particular attention to the influence of complex stresses state and loss of stability in the shear and the compression part of knee joint. The work also presents a comprehensive calculation example, which illustrates the described method usage in practical design of welded knees of steel frames.

Źródło:

Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 2; 115-132
2300-5130
2300-8903

Pojawia się w:

Czasopismo Inżynierii Lądowej, Środowiska i Architektury

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

An Assessment of Factors That Influence Outcome Following Fixation of Periprosthetic Distal Femur Fractures Associated with Total Knee Arthroplasty

Autorzy:

Fakoya, Keji
Sedarous, Ramy
Seifo, Mina
Okoro, Tosan

Powiązania:

https://bibliotekanauki.pl/articles/28409185.pdf

Data publikacji:

2022-07-01

Wydawca:

Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica

Tematy:

periprosthetic fractures
distal femur
total knee arthroplasty
functional outcome

Opis:

Background. Periprosthetic distal femur fractures following total knee arthroplasty (PDFFTKA) are increasingly common [1], mainly in elderly patients with significant co-morbidities [2]. Surgical management usually requires balancing prompt fixation for early mobilization with the need to consider the least physiologically demanding option [3].The aim of this study was to assess predictors of clinical and radiological outcome in patients with PDFFTKA treated with open reduction and internal fixation (ORIF). Materials and methods. A retrospective cohort study of patients managed for PDFFTKA over the last 21 years in the Trauma & Orthopaedics Department of the Royal Shrewsbury Hospital (RSH) was carried out. Radiological images, pre- and post-operatively, were assessed for fracture related parameters. Last known functional status was evaluated using the most recent outpatient review letters. After assessment of normality of data, evaluation of predictors of clinical and radiological outcome was made using correlation analyses. Results. There was no statistically significant correlation between age, primary TKA to fracture interval, and length of intact medial cortex vs clinical outcome for the parametric variables evaluated. For non-parametric variables assessed, there was a statistically significant correlation between clinical outcome and evidence of callus formation (Spearman rho value -0.476; p=0.022). In stratifying the patients with ‘poor’ and ‘good’ outcome, there was no difference noted in primary TKA to fracture interval, or length of intact medial cortex (mm) between both groups. In terms of the number of comminuted fragments and anterior flange to fracture distance (mm), there was also no difference noted between the ‘poor’ and ‘good’ functional groups. Conclusions. 1. There was no observed correlation in pre-operative patient and fracture related variables with outcome in this population of patients with PDFFTKA. 2. Post-operative evidence of callus formation appears to be directly related to better clinical outcomes.

Źródło:

Ortopedia Traumatologia Rehabilitacja; 2022, 24(3); 193-199
1509-3492
2084-4336

Pojawia się w:

Ortopedia Traumatologia Rehabilitacja

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Contact problems with frictioh, adhesion and wear in orthopaedic biomechanics. Part II - numerical implementation and application to implanted knee joints

Autorzy:

Rojek, J.
Telega, J. J.
Stupkiewicz, S.

Powiązania:

https://bibliotekanauki.pl/articles/279908.pdf

Data publikacji:

2001

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

unilateral contact
adhesion
friction
wear
knee joint after arthroplasty
FEM

Opis:

The present paper is the second part of the contribution by Rojek and Telega (2001). An alternative adhesion law was used to the study of bone-implant interface. Numerical scheme was developed and applied to the knee joint after arthroplasty. Influence of wear debris on this interface and currently used wear models were investigated.
Zagadnienia kontaktowe z tarciem, adhezją i zużyciem w biomachanice ortopedycznej. Część II - Implementacja numeryczna i zastosowanie do stawów kolanowych po implementacji. Niniejsza praca stanowi część drugą pracy, której autorami są Rojek i Telega (2001). Do analizy interfazy kość-implant zastosowano alternatywny opis adhezji. Opracowano algorytm numeryczny, który zastosowano do analizy stawu kolanowego po endoprotezoplastyce. Zbadano wpływ produktów zużycia na analizowaną interfazę oraz przedstawiono aktualnie stosowane modele zużycia.

Źródło:

Journal of Theoretical and Applied Mechanics; 2001, 39, 3; 679-706
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Mechatronic rehabilitation devices to re-education of the knee joint muscles

Autorzy:

Nowak, G.
Kubik, B.
Juszyński, Ł.
Wochnik, D
Sobiech, M.
Kowalski, P.
Michnik, A.

Powiązania:

https://bibliotekanauki.pl/articles/333819.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych

Tematy:

rehabilitation
knee joint
thermotherapy
traction
rehabilitacja
staw kolanowy
termoterapia
trakcja

Opis:

Article is devoted to innovative, mechatronic devices. These devices enable the rapid and effective knee joint rehabilitation. The following machines are computer-assisted. The devices have been designed and constructed by the Institute of Medical Technology and Equipment ITAM in Zabrze, after consultation with specialists in the field of rehabilitation of the Silesian Rehabilitation Centre ”REPTY”.

Źródło:

Journal of Medical Informatics & Technologies; 2013, 22; 271-276
1642-6037

Pojawia się w:

Journal of Medical Informatics & Technologies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Analysis of the electromyographic signal during rehabilitation exercises of the knee joint

Autorzy:

Grabski, J. K.
Kazimierczuk, S.
Walczak, T.

Powiązania:

https://bibliotekanauki.pl/articles/127732.pdf

Data publikacji:

2014

Wydawca:

Politechnika Poznańska. Instytut Mechaniki Stosowanej

Tematy:

electromyography
knee rehabilitation
rehabilitative exercises
elektromiografia
rehabilitacja kolana
ćwiczenia rehabilitacyjne

Opis:

The system of human locomotion is very complex. Generally we can divide it into the skeletal and muscle systems. The muscle system (muscles) enable to move the body which is formed by the skeletal system (bones). Electromyography is a technique of measurement the electrical activity of muscles which is related with shortening or lengthening of muscle fibers (muscle contraction). In the paper analysis of the electromyographic signal (EMG) recorded during knee rehabilitation exercises was conducted. The records of EMG from person after knee injury were compared with records of EMG from healthy person.

Źródło:

Vibrations in Physical Systems; 2014, 26; 79-86
0860-6897

Pojawia się w:

Vibrations in Physical Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Diagnostyka patologii uszkodzeń stawu kolanowego w badaniu rezonansu magnetycznego przy wykorzystaniu różnych sekwencji
Diagnosis of knee joint damage pathology in magnetic resonance imaging using different sequences

Autorzy:

Kasztelan, M.
Wierzchosławska, E.

Powiązania:

https://bibliotekanauki.pl/articles/112343.pdf

Data publikacji:

2018

Wydawca:

Indygo Zahir Media

Tematy:

staw kolanowy
patologia stawu kolanowego
diagnostyka
uraz
rezonans magnetyczny
sekwencje
knee joint
pathologies of the knee joint
diagnostics
injury
magnetic resonance imaging
sequences

Opis:

Wstęp: Staw kolanowy to największy staw w ludzkim ciele poddany różnym obciążeniom powiązanym z uprawianiem sportu i wykonywaniem zawodu. W obrębie tego stawu często dochodzi do urazów, które nie zostają w odpowiednio szybkim czasie zdiagnozowane. Metodą, z wyboru, mającą zastosowanie w obrazowaniu patologii stawu kolanowego jest badanie rezonansu magnetycznego (MRI). Celem pracy jest ocena skuteczności, znaczenia i przydatności sekwencji MR wykorzystywanych w ocenie patologii stawu kolanowego. Materiał i metody: Wyniki zebrano i opracowano na podstawie uzyskanych obrazów rezonansu magnetycznego w grupie pacjentów z urazem stawu kolanowego. Badano grupę liczącą 60 osób z podziałem na płeć, wiek, patologie i wskazanie kliniczne. Badania wykonano aparatem rezonansu magnetycznego Magnetom Essenza 1,5 T (Siemens, Niemcy), używając sekwencji koniecznych do oceny stawu kolanowego: T1-, T2-, PD-zależnych oraz sekwencji PD-zależnej połączonej z techniką saturacji tłuszczu (FAT SAT). Wyniki: Wszystkie sekwencje były jednakowo skuteczne w ocenie złamania rzepki. Wszystkie za wyjątkiem sekwencji T1-zależnej były jednakowo skuteczne w wykrywaniu torbieli Bakera i patologicznego płynu, a za wyjątkiem sekwencji T2-zależnej w wykrywaniu zwapnień. W ocenie patologii w zakresie więzadeł, łąkotki, chrząstki stawowej oraz występowania obrzęku tkanek miękkich i stanów zapalnych najskuteczniejsze okazały się sekwencja PD- i PD-zależna z FAT SAT. Wnioski: W ocenie patologii w zakresie stawu kolanowego za pomocą MR najskuteczniejsze okazały się sekwencje PD-zależna bez i z saturacją tłuszczu.
Introduction: The knee joint is the largest joint in the human body subjected to various strains associated with practicing sports and exercising the profession. Injuries often occur within this knee joint, which are not diagnosed at the appropriate time. The method of choice applicable in the imaging of knee joint pathology is a magnetic resonance imaging (MRI). The aim of the work is to show the effectiveness of meaning and usefulness of the sequences, used in the assessment of pathologies of the knee joint. Material and methods: The results were collected and elaborated on the basis of obtained magnetic resonance images in the group of patients with a knee joint injury. A group of 60 subjects were examined with division into sex, pathologies, age and clinical indication. The examinations were carried out by a magnetic resonance apparatus Magnetom Essenza 1,5 T (Siemens Germany) using necessary sequences to estimate knee joint: T1-, T2- and dependent PD and dependent PD sequence combined with fat saturation technique (FAT SAT). Results: All sequences were equally effective in the assessment of patella fracture. All sequences with the exception of the dependent T1 sequence were equally effective in detecting the Baker cyst and the pathological fluid, with the exception of the dependent T2 sequence in the detection of calcifications. In the assessment of knee joint pathology in the scope of ligaments, meniscus, articular cartilage, and the occurrence of soft tissue edema and inflammation, the most effective sequence turned out to be PD- and PD with FAT SAT. Conclusions: In the assessment of knee joint pathology by means of (MRI) the most effective sequence turned out to be dependent PD without and with fat saturation (FAT SAT).

Źródło:

Inżynier i Fizyk Medyczny; 2018, 7, 5; 311-315
2300-1410

Pojawia się w:

Inżynier i Fizyk Medyczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Analiza strukturalna, geometryczna i statyczna mechanizmu stawu kolanowego
Analysis of structural, geometrical and static of knee-joint mechanism

Autorzy:

Stępniewski, A.

Powiązania:

https://bibliotekanauki.pl/articles/386350.pdf

Data publikacji:

2010

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

staw kolanowy
biomechanika
analiza strukturalna
knee joint
biomechanics
structural analysis

Opis:

W pracy przeprowadzono analizę strukturalną, geometryczną i statyczną mechanizmu wzorowanego na budowie stawu kolanowego człowieka. Wyznaczono ruchliwość, zidentyfikowano więzy bierne i sklasyfikowano mechanizm stawu. Określono podstawowe wymiary, konieczne do opisania geometrii stawu. Do analizy przyjęto uproszczony model płaski. Wykorzystując przekształcenia układów współrzędnych Denavita-Hartenberga, wyznaczono wektory położeń charakterystycznych punktów kości udowej i rzepki względem kości piszczelowej. Wyznaczono obciążenia elementów stawu. Zamieszczono przykład obliczeniowy będący ilustracją omówionego algorytmu obliczeniowego.
This article shows structural, geometrical and static analysis of the knee-joint. Mobility was determined and passive bonds were identified. The basic dimensions were defined, neces- sary for description of geometry of joint. Simplified flat model was accepted for mobility analysis. Using the transformation of arrangement co-ordinate Denavit-Hartenberg, vectors of sites characteristic of bones of femoral bone, according to tibial bone were defined. Loads of elements of the pond were set. Computational being example was put illustration of discussed algorithm.

Źródło:

Acta Mechanica et Automatica; 2010, 4, 1; 80-85
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 39.

Tytuł:

Modelling of the human knee joint supported by active orthosis

Autorzy:

Musalimov, V.
Monahov, Y.
Tamre, M.
Robak, D.
Sivitski, A.
Aryassov, G.
Penkov, I.

Powiązania:

https://bibliotekanauki.pl/articles/264620.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

staw kolanowy
biomechatronika
orteza
modelowanie
knee joint
active orthoses
biomechatronics

Opis:

The article discusses motion of a healthy knee joint in the sagittal plane and motion of an injured knee joint supported by an active orthosis. A kinematic scheme of a mechanism for the simulation of a knee joint motion is developed and motion of healthy and injured knee joints are modelled in Matlab. Angles between links, which simulate the femur and tibia are controlled by Simulink block of Model predictive control (MPC). The results of simulation have been compared with several samples of real motion of the human knee joint obtained from motion capture systems. On the basis of these analyses and also of the analysis of the forces in human lower limbs created at motion, an active smart orthosis is developed. The orthosis design was optimized to achieve an energy saving system with sufficient anatomy, necessary reliability, easy exploitation and low cost. With the orthosis it is possible to unload the knee joint, and also partially or fully compensate muscle forces required for the bending of the lower limb.

Źródło:

International Journal of Applied Mechanics and Engineering; 2018, 23, 1; 107-120
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 40.

Tytuł:

Projekt konstrukcji manipulatora rehabilitacyjnego uwzględniającego ruch osi obrotu stawu kolanowego

Autorzy:

Sauer, P.
Drążkowska, M.
Koczewski, P.
Jóźwiak, M.
Shadi, M.
Boruszak, T.
Koczewski, W.

Powiązania:

https://bibliotekanauki.pl/articles/2063864.pdf

Data publikacji:

2014

Wydawca:

Międzynarodowe Stowarzyszenie na rzecz Robotyki Medycznej

Tematy:

metoda Ilizarowa
manipulator rehabilitacyjny stawu kolanowego
środek obrotu chwilowy
ruch w stawie kolanowym
Ilizarov method
knee rehabilitation manipulator
Instantaneous Center of Rotation
knee motion

Opis:

Celem pracy było zaprojektowanie i wykonanie prototypu manipulatora rehabilitacyjnego stawu kolanowego o jednym stopniu swobody, który uwzględnia ruch osi w stawie kolanowym. Manipulator ten ma być wykorzystywany do rehabilitacji dzieci w wieku od 6 do 18 lat, u których prowadzone jest wydłużanie kości udowej za pomocą aparatu Ilizarowa. W trakcie realizacji projektu opracowano i przetestowano metody opisu trajektorii ruchu w stawie kolanowym. Zaprojektowano i wykonano wstępną konstrukcję manipulatora rehabilitacyjnego uwzględniającego ruch osi obrotu stawu kolanowego.
The aim of the study was to design of the knee rehabilitation manipulator with one degree of freedom, which takes into account the movement of the axis of the knee. The manipulator is to be used for the rehabilitation of children aged 6 to 18 years, who conducted the femoral lengthening using the Ilizarov apparatus. During the project were developed and tested methods of description of the motion trajectory of the knee. Designed and manufactured preliminary rehabilitation manipulator structure that takes into account the movement of the axis of rotation of the knee.

Źródło:

Medical Robotics Reports; 2014, 3; 32--38
2299-7407

Pojawia się w:

Medical Robotics Reports

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 41.

Tytuł:

Knee osteoarthritis in a chestnut farmer – case report

Autorzy:

Mattioli, Stefano
Graziosi, Francesca
Curti, Stefania
Bonfiglioli, Roberta
Argentino, Antonio
Violante, Francesco Saverio

Powiązania:

https://bibliotekanauki.pl/articles/989896.pdf

Data publikacji:

2017

Wydawca:

Instytut Medycyny Wsi

Tematy:

knee osteoarthritis
chestnut farmer
agricultural workers’ diseases
occupational exposure
biomechanical overload

Opis:

Introduction. Several studies have dealt with the issue of professional risk factors and onset of knee osteoarthritis (OA). In particular, occupational epidemiological studies have provided evidence that activities resulting in biomechanical overload may be linked with an increased risk of knee OA – also among farmers. To our knowledge, no cases of knee OA among chestnut farmers have been reported in the literature. Case report. We report the case of a 70-year-old Caucasian male who has worked for more than 50 years on a chestnut farm. In 2007, an X-ray and a MRI, performed after a workplace accident to his left knee, showed the presence of knee OA. His job required a range of repetitive tasks, such as squatting, kneeling, climbing, walking on sloping terrain, assuming uncomfortable postures, and lifting and carrying heavy loads for the great majority of the working day. All the aforementioned tasks are known occupational risk factors for knee OA. Regarding individual risk factors, at the time of the first diagnosis of knee OA, the worker was 64-years-old with a body mass index of 26.5 kg/m2. He reported no cases of arthritis among his relatives and no sports playing on his part. In addition, his medical history revealed the presence of two minor lumbar disc herniations and tendinitis of the long head of the biceps. Conclusion. Considering the lack of major individual risk factors for knee OA, it is reasonable to suppose that five decades of exposure to biomechanical overload as a chestnut farmer was a relevant risk factor for the onset of the disease.

Źródło:

Annals of Agricultural and Environmental Medicine; 2017, 24, 1
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 42.

Tytuł:

Ratios of torques of antagonist muscle groups in female soccer players

Autorzy:

Struzik, A.
Siemieński, A.
Bober, T.
Pietraszewski, B.

Powiązania:

https://bibliotekanauki.pl/articles/307148.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

staw kolanowy
asymetria
ścięgna
asymmetry
knee joint
hamstring-to-quadriceps ratio

Opis:

An increase in the value of the hamstring-to-quadriceps (H/Q) ratio with an increase in angular velocity may effectively prevent injuries of the back of the thigh. Previous studies have found that the conventional H/Q ratio was unaltered along with an increasing angular velocity in females. Therefore, this study aimed to investigate the relationships between the conventional H/Q ratio and angular velocity in a group of female soccer players. Methods: The study was carried out on a group of 16 female soccer players (age: 20.7 ± 3.9 years, body height: 166.1 ± 5.8 cm, body mass: 58.4 ± 6.2 kg, training experience: 8.8 ± 4.1 years). Measurements of peak torque of extensors and flexors of the knee joint under static conditions and under isokinetic conditions (at angular velocities of 30°/s, 60°/s, 90°/s and 120°/s) were carried out using a Biodex dynamometer. Results: There was a statistically significant increase in the conventional H/Q ratio with an increase in angular velocity. These differences occurred between measurements at angular velocities of 0°/s and 30°/s, and 30°/s and 60°/s. Conclusions: As previously found for males, an increase in conventional H/Q ratio with increased angular velocity was also present in this group of female players. This phenomenon should reduce the number of injuries of the muscles of back of the thigh. Coaches should pay attention to increasing the level of strength in the group of knee joint flexor muscles so as to make the value of the H/Q ratio appropriately high and increasing with increasing angular velocity.

Źródło:

Acta of Bioengineering and Biomechanics; 2018, 20, 1; 153-158
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 43.

Tytuł:

The efficacy of mud pack treatment on ailments related to gonarthrosis
Wpływ terapii z zastosowaniem okładów borowinowych na dolegliwości związane z chorobą zwyrodnieniową stawu kolanowego

Autorzy:

Mika, Anna
Dąbal, Ewa
Mika, Łukasz

Powiązania:

https://bibliotekanauki.pl/articles/1935833.pdf

Data publikacji:

2006

Wydawca:

Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie

Tematy:

osteoarthrosis
Knee
mud-pack
therapy
choroba zwyrodnieniowa
Staw kolanowy
borowina
leczenie

Opis:

Background: The aim of this study was to evaluate whether mud pack application as a supplementary treatment to physiotherapy and therapy with physical agents allow to achieve better outcome than physiotherapy and therapy with physical agents alone in patients suffering from gonarthrosis.Methods: Twenty patients aged 49 to 70 at II and III stage of gonarthrosis were divided into experimental and control groups each comprising 10 patients. The experimental group was treated by mud pack, exercises and therapy with physical agents, whereas the control group only by exercises and therapy with physical agents. The following parameters were evaluated in all patients before and two weeks after the therapy: range of motion in the knee, leg circumference, self-assessment of disease severity (using WOMAC questionnaire), and pain level (using VAS scale).Results: We observed that joint stiffness (assessed using WOMAC questionnaire) decreased significantly only in the experimental group (p<0.05). Significant decrease in pain level assessed by means of VAS scale was noticed in both groups (p<0.05). After the therapy, a significant improvement in knee flexion (p<0.05) was observed only in the control group.Conclusion: Both treatment modalities had similar effects on pain severity. Reduction of joints stiffness observed 2 weeks following the treatment may suggest that mud pack may be used as a supplementary component in the therapy of osteoarthrosis.
Cel: Celem niniejszej pracy było ustalenie czy zastosowanie okładów borowinowych jako elementu uzupełniającego kinezyterapię i fizykoterapię pozwoli uzyskać lepszy efekt terapeutyczny u pacjentów z chorobą zwyrodnieniową stawów kolanowych niż zastosowanie leczenia opartego tylko na kinezyterapii i fizykoterapii. Materiał i metoda: Badaniami objęto 20 kobiet w wieku 49-70 lat, u których stwierdzono II° i III° (wg klasyfikacji Seyfrieda) choroby zwyrodnieniowej stawu kolanowego. Wszystkich badanych losowo podzielono na dwie grupy: badaną (n=10) i kontrolną (n=10). W grupie badanej zastosowano: okłady borowinowe, kinezyterapię i fizykoterapię, a w kontrolnej tylko kinezyterapię i fizykoterapię. Pacjentów badano dwukrotnie: bezpośrednio przed rozpoczęciem leczenia i po 2 tygodniach w ostatnim dniu zabiegów. U każdego z badanych przeprowadzono pomiar: zakresu ruchomości w stawie kolanowym i obwodu kończyny, ocenę stopnia dolegliwości wynikających z choroby zwyrodnieniowej przy użyciu kwestionariusza WOMAC, oraz pomiar stopnia intensywności odczuwania bólu za pomocą skali VAS. Wyniki: Stwierdzono, iż odczuwana przez pacjentów sztywność w stawie (badana przy pomocy kwestionariusza WOMAC) statystycznie istotnie zmniejszyła się tylko w grupie badanej (p<0.05). Zauważono, iż w obu grupach po zastosowanej terapii nastąpiło statystycznie istotne zmniejszenie poziomu bólu (p<0.05), ocenianego za pomocą skali VAS. Po 2 tygodniach terapii statystycznie istotny przyrost w zakresie zgięcia (p<0.05) zaobserwowano tylko w grupie kontrolnej. Wnioski: Zarówno leczenie oparte tylko na kinezyterapii i fizykoterapii jak i model uzupełniony o okłady borowinowe wykazuje zbliżone działanie przeciwbólowe. Obserwowane po 2 tygodniach zabiegów obniżenie sztywności stawowej pozwala sugerować, że borowina może być włączona jako element uzupełniający terapię choroby zwyrodnieniowej stawów.

Źródło:

Medical Rehabilitation; 2006, 10(1); 57-66
1427-9622
1896-3250

Pojawia się w:

Medical Rehabilitation

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 44.

Tytuł:

Analiza wytrzymałościowa endoprotezy stawu kolanowego
Strength analysis of total knee prosthesis

Autorzy:

Tejszerska, D
Długoszewski, T.
Gąsiorek, D

Powiązania:

https://bibliotekanauki.pl/articles/99077.pdf

Data publikacji:

2010

Wydawca:

Politechnika Śląska. Katedra Biomechatroniki

Tematy:

analiza wytrzymałościowa
endoproteza
staw kolanowy
ANSYS
strength analysis
endoprosthesis
knee joint

Opis:

W artykule przedstawiono analizę wytrzymałościową endoprotezy stawu kolanowego z wyłączeniem elementu udowego dla kilku wariantów obciążenia. Analiza ta pozwala na obserwację wpływu obciążenia na stan naprężeń i odkształceń w kości i endoprotezie. Model i jego analizę przeprowadzono metodą elementów skończonych w programie Ansys Workbench.
Numerical strength analysis of total knee prosthesis without femur element for few variants of load was presented in this paper. This analysis allow us observe the influence of load on the state of stress and strain in tibia bone and prosthesis . The model and its finite element analysis was performed in ANSYS Workbench.

Źródło:

Aktualne Problemy Biomechaniki; 2010, 4; 213-218
1898-763X

Pojawia się w:

Aktualne Problemy Biomechaniki

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Study on the Influence of Elastic Compression Pants Elasticity and Movement Speed on Human Joint Protection

Autorzy:

Zhang, Ningfeng
Liu, Chengxia

Powiązania:

https://bibliotekanauki.pl/articles/2200750.pdf

Data publikacji:

2022

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

fabric
movement speed
protective performance
knee joint
3D motion capture

Opis:

The aim of this study was to clarify how human movement speed and pants elasticity affect the athletic performance of knee joint protection by testing pants with different elastic properties: CP1 (tight pants) and CP2&CP3 (elastic compression pants), which reinforce the knee joint. In addition, CS (cotton sport pants) was developed as a control garment. Three subjects wore CP1, CP2, CP3 and CS while running on the treadmill at three kinds of human movement speed. A three-dimensional motion capture instrument was used to capture the three-dimensional trajectory of the marked points of lower limbs. As a result, the influence of the movement speed on the kinematic parameters (AKJ & gait cycle) was more obvious than the fabric elasticity. If elastic pants are worn during running, the change of AKJ will be stable with the increase of speed. When non-elastic pants are worn, the effect is opposite. Not only that, elastic compression pants are efficient in reducing the motion amplitude of the knee joint during the suspension period as far as 41°, making it highly practical in terms of stability. That is, the elastic fabric can protect the joints when the lower limbs are in motion. Moreover, with the increase of speed and elasticity, the elastic pants can reduce the gait cycle by up to 22% compared with non-elastic pants alone. Through the kinematics mechanism of human joints, these findings may translate into an effect on protective performance and a reduction in sport injuries. Therefore, it is necessary to wear elastic pants, especially compression pants, when running at higher speed, as the average gait cycle gradually decreases. This research shows that the knee joint protection functions of elastic compression garments differ according to the level of elasticity and differential movement speed, providing theoretical support for designing and producing elastic compression pants. It also acts as a guide for the research of lower limb joint protection.

Źródło:

Fibres & Textiles in Eastern Europe; 2022, 6 (151); 80--90
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:

Analiza geometryczna i ruchowa stawu kolanowego człowieka
Geometrical and mobility analysis of knee joint of man

Autorzy:

Stępniewski, A. A.

Powiązania:

https://bibliotekanauki.pl/articles/972139.pdf

Data publikacji:

2009

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

analiza strukturalna
analiza kinematyczna
staw kolanowy
structural analysis
kinematical analysis
knee joint

Opis:

W pracy przeprowadzono analizę strukturalną i geometryczno-ruchową płaskiego modelu stawu kolanowego. Wyznaczono ruchliwość i zidentyfikowano więzy bierne. Określono podstawowe wymiary, konieczne do opisania geometrii stawu. Do analizy ruchowej przyjęto uproszczony model płaski. Wykorzystując przekształcenia układów współrzędnych Denavita-Hartenberga, wyznaczono wektory położeń charakterystycznych punktów kości udowej względem kości piszczelowej. Wyznaczono linię styku kości piszczelowej z udową dla pełnego zakresu ruchu w stawie. Opracowano algorytm wyznaczania współrzędnych położenia punktu przytwierdzenia więzadeł pobocznych do kości udowej dla zadanego położenia punktu przytwierdzenia względem kości piszczelowej. Zamieszczono przykład obliczeniowy będący ilustracją omówionego algorytmu.
The paper presents the structural, geometric and mobility analysis of flat mechanism of the knee joint model. The mobility was determined and passive bonds were identified. The basic dimensions, necessary for description of the joint geometry, were defined. The simplified flat model was assumed for the mobility analysis. Using the transformation of Denavit-Hartenberg systems of coordinates, vectors of position of the femoral bone characteristic points in relation to the tibial bone were determined. The shape of the tibial bone pan assuring solid contact of the bone during full range of movement in the joint was defined. There was worked out an algorithm for determining the position coordinates of the point of attaching marginal ligaments to the femoral bone for the given position of the attaching point in relation to the tibial bone. The example of computations illustrating the algorithm discussed is presented in the paper. It can be stated that in the joint flat model there appear three passive fetters: the point of the bone junction, two marginal ligaments along with the kinematic pair. The relative movement along circle of marginal ligaments ends is loaded with the radial error equal to 0,7 mm.

Źródło:

Pomiary Automatyka Kontrola; 2009, R. 55, nr 6, 6; 342-345
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Microscopic tribological analysis of the knee joint
Mikroskopowa analiza tribologiczna w stawie kolanowym

Autorzy:

Ryniewicz, A. M.
Ryniewicz, A.
Pukaluk, A.
Pałka, P.

Powiązania:

https://bibliotekanauki.pl/articles/188937.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

knee joint
meniscus
articular cartilage
SEM
AFM
staw kolanowy
łąkotka
chrząstka stawowa

Opis:

The aim of the conducted research was the evaluation of the topography and the structure of the superficial layer of meniscus and articular cartilage. These are surfaces that optimise the friction and lubrication process in the knee joint. The animal samples of the menisci and the articular cartilage were examined. The research was performed using scanning electron microscopes and an atomic force microscope. The structure of the surface of meniscus and articular cartilage is very regular. The collagenous fibres, which are embedded in the ground substance, are parallel to the surface. The undulation of the surface was observed. In the area of the anterior horn on tibia side of both menisci as well as in the anterior area of tibial plateau, the concavity and convexity pattern is evident. The observed cavities enable the accumulation of the synovial fluid. The synovial fluid plays the role of the lubricant in the knee joint, and its presence is highly desired during the load transmission.
Celem przeprowadzonych badań była ocena topografii i struktury łąkotek oraz powierzchni stawowych, które zabezpieczają i optymalizują proces tarcia i smarowania w stawie kolanowym. Materiałem badań były łąkotki pobrane z prawidłowych stawów zwierzęcych oraz tkanka chrzęstna wypreparowana z powierzchni stawowych. Badania były realizowane na mikroskopach skaningowych oraz mikroskopie sił atomowych. Struktura warstwy wierzchniej chrząstki włóknistej oraz szklistej wykazała dużą regularność. Włókna kolagenowe biegnące równolegle do powierzchni i zatopione w substancji podstawnej tworzą łagodnie pofalowaną strukturę. Układ wgłębień i wzniesień jest najbardziej wyraźny na części przedniej plateau kości piszczelowej oraz w obszarze rogu przedniego łąkotek, po stronie kontaktującej się z plateau kości piszczelowej. W zaobserwowanych wgłębieniach może gromadzić się ciecz synowialna, która pełni rolę środka smarnego, i której obecność jest wysoce pożądana podczas przenoszenia obciążeń wewnątrz stawu kolanowego.

Źródło:

Tribologia; 2017, 273, 3; 147-154
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Displacement analysis of the human knee joint based on the spatial kinematic model by using vector method

Autorzy:

Knapczyk, J.
Góra-Maniowska, M.

Powiązania:

https://bibliotekanauki.pl/articles/386514.pdf

Data publikacji:

2017

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

human knee joint model
kinematic analysis
parallel mechanism
constraint equations
vector method

Opis:

Kinematic model of the human knee joint, considered as one-degree-of-freedom spatial parallel mechanism, is used to analyse the spatial displacement of the femur with respect to the tibia. The articular surfaces of femoral and tibia condyles are modelled, based on selected references, as spherical and planar surfaces. The condyles are contacted in two points and are guided by three ligaments modelled as binary links with constant lengths. In particular, the mechanism position problem is solved by using the vector method. The obtained kinematic characteristics are adequate to the experimental results presented in the literature. Additionally, the screw displacements of relative motion in the knee joint model are determined.

Źródło:

Acta Mechanica et Automatica; 2017, 11, 4; 322-327
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Analiza numeryczna i eksperymentalna przepływomierza kolanowego
Numerical and experimental investigation of knee-shaped flow meter

Autorzy:

Kłosowiak, R.
Nygard, A.
Judt, W.

Powiązania:

https://bibliotekanauki.pl/articles/317166.pdf

Data publikacji:

2017

Wydawca:

Instytut Naukowo-Wydawniczy "SPATIUM"

Tematy:

przepływomierz kolanowy
analiza numeryczna
analiza eksperymentalna
knee flowmeter
numerical analysis
experimental analysis

Opis:

Elementem pomiarowym przepływomierza jest kolano rurowe, które znajduje się w praktycznie każdej instalacji przemysłowej. Kolano, jako element już istniejący w instalacji, nie wprowadza dodatkowych strat ciśnienia. Metoda ta choć mało popularna stanowi często jedyną możliwość pomiaru strumienia cieczy. Celem niniejszej pracy jest sprawdzenie możliwości i dokładności wyznaczenia charakterystyki przepływomierza kolanowego bez przeprowadzania kalibracji na obiekcie rzeczywistym. Praca obejmuje wyznaczenia charakterystyki rzeczywistego kolana segmentowego w oparciu o badania modelu laboratoryjnego i obliczenia numeryczne CFD.
The measuring element of the flowmeter is a tubular bend which can be found in practically every industrial installation. Tubular bend, as an element already existing in the installation, does not bring additional pressure losses. This method, although not popular, is often the only way to measure the liquid stream flow. The purpose of this paper is to check the ability and accuracy of characteristic designation for the knee-shaped flow meter without calibration on a real object. Article includes the determination of the actual segmental tubular bend characteristics based on laboratory model and numerical CFD calculations.

Źródło:

Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 962-966, CD
1509-5878
2450-7725

Pojawia się w:

Autobusy : technika, eksploatacja, systemy transportowe

Dostawca treści:

Biblioteka Nauki

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Tytuł:

The issue of contact strength occuring in polyethylene flat inserts of total knee endoprostheses

Autorzy:

Nabrdalik, M.

Powiązania:

https://bibliotekanauki.pl/articles/122342.pdf

Data publikacji:

2013

Wydawca:

Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej

Tematy:

endoprosthesis of knee joint
stress
strain
Hertz theory
naprężenie
odkształcenie
teoria Hertza

Opis:

The paper presents the numerical analysis of stress and strain occurring in the most wearable parts of knee joint endoprostheses. In the knee joint that would be the pair: sled - flat insert. The complexity of the processes taking place both in natural and artificial joints makes it necessary to conduct the analysis on the 3D model and base it on already existing mathematical models. Finite elements method makes it possible to calculate the stress in particular elements of the tested model. The interaction between the two parts of endoprosthesis takes place on a comparatively small contact surface. The material on that surface is under a spatial state of stress and its stress distribution is very complex and can be designated only as resilience theory. High stress caused by pressure between the two parts is called contact stress.

Źródło:

Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 2; 81-87
2299-9965

Pojawia się w:

Journal of Applied Mathematics and Computational Mechanics

Dostawca treści:

Biblioteka Nauki

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