Autor: Tomaszewski, Krzysztof Andrzej - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The application of digital image correlation to investigate the heterogeneity of Achilles tendon deformation and determine its material parameters
Autorzy:: Kohut, Piotr
Holak, Krzysztof
Ekiert, Martyna
Młyniec, Andrzej
Tomaszewski, Krzysztof A.
Uhl, Tadeusz
Powiązania:: https://bibliotekanauki.pl/articles/1839687.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: digital image correlation
full-field displacement
strain measurement
vision systems
human Achilles tendon
Young’s modulus
Opis:: The challenge for researchers is to develop measurement techniques that can deal with biological specimens (e.g. the human Achilles tendon) characterized by high deformation during examination. The relevant quantity which has to be investigated in laboratory experiments is the deformation or strain field of the specimen subjected to a given load. In experimental mechanics, the most remarkable technique used for strain field computation is the Digital Image Correlation (DIC) method. In the paper, the DIC method is employed to study biomaterial parameters of human Achilles tendons (AT) subjected to tensile uniaxial loadings. The application of DIC allows the heterogeneity of tendon deformation to be taken into consideration. Young’s modulus of AT based on the strain field obtained from a vision-based measurement is estimated and the results are discussed. A map of Young’s modulus (YM) is demonstrated as well.
Źródło:: Journal of Theoretical and Applied Mechanics; 2021, 59, 1; 43-52
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Interstitial Cajal-Like Cells and Bile Lithogenicity in the Pathogenesis of Gall-Stone Disease
Autorzy:: Pasternak, Artur
Matyja, Andrzej
Gil, Krzysztof
Gajda, Mariusz
Tomaszewski, Krzysztof A.
Matyja, Maciej
Walocha, Jerzy A.
Kulig, Jan
Powiązania:: https://bibliotekanauki.pl/articles/1396274.pdf
Data publikacji:: 2013-06-01
Wydawca:: Index Copernicus International
Tematy:: bile lithogenecity
interstitial Cajal-like cells
gall-stone disease
c-Kit
mast cells
Opis:: Gall-stone disease constitutes a serious clinical problem and is the most frequent cause of elective cholecystectomies. There are many etiopatogenic factors however; lithogenic bile and its stasis due to gall-bladder hypomotility seem to be the most important. In recent years discovery of pacemaker function of Interstitial Cells of Cajal changed our understanding of smooth muscle physiology and helped to disclose many gastrointestinal motility disorders. The aim of the study was identification and quantification of interstitial Cajal-like cells (ICLCs) in gall-bladder muscle wall from patients with cholelithiasis and in gall-stone-free controls, as well as determination of the relationship between the number of ICLCs and Cholesterol Saturation Index (CSI) of bile in both analyzed groups. Material and methods. 20 patients operated for symptomatic cholelithiasis were enrolled into the study group. The control group consisted of 20 patients operated for pancreatic head tumors, with no pre- and intraoperative signs of gall-stones. Identification of ICLCs in the gall-bladder was performed by means of double immunofluorescence technique with anti c-Kit and anti-mast cell tryptase antibodies. Quantitative analysis was carried out under fluorescence microscopy conjoined with image analysis software. Bile samples were used for calculation of CSI. Results. ICLCs were detected within gall-bladder muscle wall. Number of ICLCs was statistically significantly lower in patients from the study group as compared to control. The study also revealed statistically significantly higher CSI in the study group. Conclusions. The quantity of ICLCs is diminished in the gall-bladder from patients with cholelithiasis and there is negative correlation between the number of ICLCs and CSI of bile. Regarding the role of ICCs in regulation of GI tract motility, it appears that reduction in their number may be important etiopatogenic factor of cholelithiasis.
Źródło:: Polish Journal of Surgery; 2013, 85, 6; 311-316
0032-373X
2299-2847
Pojawia się w:: Polish Journal of Surgery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Primary Adenocarcinoma of the Appendix – A Case Report
Autorzy:: Pasternak, Artur
Pach, Radosław
Szura, Mirosław
Solecki, Rafał
Tomaszewski, Krzysztof A.
Szczepański, Wojciech
Matyja, Andrzej
Kulig, Jan
Powiązania:: https://bibliotekanauki.pl/articles/1395798.pdf
Data publikacji:: 2014-07-01
Wydawca:: Index Copernicus International
Tematy:: adenocarcinoma
appendix
laparoscopic appendectomy
right hemicolectomy
Opis:: Primary adenocarcinoma of the vermiform appendix is a rare clinical condition. It usually presents as an acute abdominal process or as a mass in the right lower quadrant. The gross pathologic and microscopic characteristics of this disease are the same as for colon carcinoma and carry a serious prognosis. We report a case of a 64-year old male patient presenting symptoms of acute appendicitis. The patient underwent laparoscopic appendectomy that revealed a severely inflamed appendix. Histopathological examination has shown that it was a poorly differentiated, high grade adenocarcinoma invading the periappendicular fat. According to the histopathological findings, a right hemicolectomy was further advised and performed. Right hemicolectomy is the generally recommended method of treatment for invasive adenocarcinoma of the appendix
Źródło:: Polish Journal of Surgery; 2014, 86, 7; 333-336
0032-373X
2299-2847
Pojawia się w:: Polish Journal of Surgery
Dostawca treści:: Biblioteka Nauki

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