| T model partition of lung and respiratory system impedances. | |
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MedLine Citation:
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PMID: 7775339 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this work was to demonstrate that the three compartments of the lung T network and the chest wall impedance (Zcw) can be identified from input and transfer impedances of the respiratory system if the pleural pressure is recorded during the measurements. The method was tested in six healthy volunteers in the range of 8-32 Hz. The impedances resulting from the decomposition confirm the adequacy of the monoalveolar structure commonly used in healthy subjects. Indeed, the T shunt impedance is well modeled by a purely compliant element, the mean compliance [0.038 +/- 0.081 (SD) l/kPa], which coincides within 9.5 +/- 6.3% of the alveolar gas compressibility derived from thoracic gas volume (0.036 +/- 0.011 l/kPa). The results obtained provide experimental evidence that the alveolar gas compression is predominantly isothermal and that lung tissue impedance is negligible throughout the whole frequency range. The shape of Zcw is consistent with a low compliance-low inertance pathway in parallel with a high compliance-high inertance pathway. We conclude that the proposed method is able to reliably identify the T network featuring the lung and Zcw. |
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Authors:
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M Rotger; R Farré; R Peslin; D Navajas |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 78 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 1995 Mar |
Date Detail:
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Created Date: 1995-07-11 Completed Date: 1995-07-11 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 938-47 Citation Subset: IM |
Affiliation:
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Laboratori Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Spain. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Airway Resistance* Female Humans Lung / physiology* Male Middle Aged Models, Biological* Pressure Pulmonary Alveoli / physiology Pulmonary Ventilation* Respiratory Physiological Phenomena* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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