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    Wyświetlanie 1-3 z 3
    Tytuł:
    Evaluating transmitters for quantifying respiratory airflow in the breathing mechanism
    Autorzy:
    Barański, Robert
    Nitkiewicz, Szymon
    Zając, Andrzej
    Kukwa, Andrzej
    Stano, Łukasz
    Szawarc, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/27313802.pdf
    Data publikacji:
    2024
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    signal analysis
    flow sensors
    breathing
    measurements
    Opis:
    Techniques for measuring fluid flow have been known since the 19th century. The first solutions based on the use of pressure only allowed relatively slow changes to be observed. It was not until measurement techniques based on the use of electronic components and the phenomenon of thermo-transfer, combined with a method enabling fast signal recording (A/C converters), that it became possible to analyse the flow of a medium (e.g. air) in detail. Although flow sensors based on measuring changes in resistance have been known for many years, new solutions are still being developed. This paper presents the results of a study using three sensors. Their response to laminar airflow was investigated for different velocities (1.2 - 2.6 m/s). The flow forcing was implemented using an axial fan and the signals were measured simultaneously for all the sensors tested. The results showed which sensors had the smallest dispersion of results (PAN and WA sensors) and confirmed that for the investigated velocity variations (0.14 m/s pitch) the results are unambiguously interpretable.. It should be noted that sensor research is related to the need to develop a device to measure flow as accurately as possible, while at the same time ensuring the comfort of the test person during the measurements. Therefore, the search was for a sensor that is small in size and at the same time resistant to damage and operation in a harsh humid environment.
    Źródło:
    Diagnostyka; 2024, 25, 1; art. no. 2024105
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anatomical and functional assessment of patency of the upper respiratory tract in selected respiratory disorders - Part 2
    Autorzy:
    Zając, Andrzej
    Kukwa, Andrzej
    Barański, Robert
    Nitkiewicz, Szymon
    Zomkowska, Edyta
    Rybak, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/2173877.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optical diagnostic in otolaryngology
    upper respiratory tract diagnostics
    otolaryngology
    spirometer
    Fourier transform
    wavelet transform
    quantitative parameters of the respiratory cycle
    Opis:
    This article presents selected physical diagnostic methods used in otorhinolaryngology and results of their application. In addition to the applications of methods using the capabilities of selective sensors, selected methods of hybrid diagnostics were also presented - for assessment of parameters of respiratory processes, with polysomnography as an example of using both typical diagnostic methods dedicated to otolaryngology, as well as standard EEG and ECG methods. It has been shown that in some special cases of respiratory disorders, measurements of the air flow in the respiratory tract can be supplemented with pressure measurements in selected positions within the airways. The presented optical methods and diagnostic systems are very often used in the diagnosis of diseases not specific for otolaryngology occurring in the area of the head and neck. The presented material is the second part of the study discussing both standard and widely used diagnostic methods. All presented methods are dedicated to otolaryngology. This text is a continuation of the material published in No 4 of 2021 [1].
    Źródło:
    Metrology and Measurement Systems; 2022, 29, 3; 429--454
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anatomical and functional assessment of patency of the upper respiratory tract in selected respiratory disorders - Part 1
    Autorzy:
    Kukwa, Andrzej
    Zając, Andrzej
    Barański, Robert
    Nitkiewicz, Szymon
    Kukwa, Wojciech
    Zomkowska, Edyta
    Rybak, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/2052154.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optical diagnostic in otolaryngology
    upper respiratory tract diagnostics
    otolaryngology
    spirometer
    Fourier transform
    wavelet transform
    quantitative parameters of the respiratory cycle
    Opis:
    The rapidly developing measurement techniques and emerging new physical methods are frequently used in otolaryngological diagnostics. A wide range of applied diagnostic methods constituted the basis for the review study aimed at presenting selected modern diagnostic methods and achieved diagnostic results to a wider group of users. In this part, the methods based on measuring the respiratory parameters of patients were analysed. Respiration is the most important and necessary action to support life and its effective duration. It is an actual gas exchange in the respiratory system consisting of removing CO2 and supplying O2. Gas exchange occurs in the alveoli, and an efficient respiratory tract allows for effective ventilation. The disruption in the work of the respiratory system leads to measurable disturbances in blood saturation and, consequently, hypoxia. Frequent, even short-term, recurrent hypoxia in any part of the body leads to multiple complications. This process is largely related to its duration and the processes that accompany it. The causes of hypoxia resulting from impaired patency of the respiratory tract and/or the absence of neuronal respiratory drive can be divided into the following groups depending on the cause: peripheral, central and/or of mixed origin. Causes of the peripheral form of these disorders are largely due to the impaired patency of the upper and/or lower respiratory tract. Therefore, early diagnosis and location of these disorders can be considered reversible and not a cause of complications. Slow, gradually increasing obstruction of the upper respiratory tract (URT) is not noticeable and becomes a slow killer. Hypoxic individuals in a large percentage of cases have a shorter life expectancy and, above all, deal with the consequences of hypoxia much sooner.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 4; 813-836
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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