| Mechanical work of breathing during maximal voluntary ventilation. | |
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MedLine Citation:
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PMID: 9655783 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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With the use of the esophageal balloon technique, the working capacity of the respiratory muscles was assessed in four normal subjects by measuring the work per breath (W) and respiratory power (W) during maximal voluntary ventilation with imposed respiratory frequencies (f) ranging from 20 to 273 cycles/min. Measurements were made in a body plethysmograph to assess the work wasted as a result of alveolar gas compressibility (Wg'). In line with other types of human voluntary muscle activity, W decreased with increasing f, whereas W exhibited a maximum at f of approximately 100 cycles/min. Up to this f value, Wg' was small relative to W. With further increase in f, the Wg'/W ratio increased progressively, amounting to 8-22% of W at f of 200 cycles/min. |
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Authors:
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J Milic-Emili; M M Orzalesi |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 85 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 1998 Jul |
Date Detail:
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Created Date: 1998-08-17 Completed Date: 1998-08-17 Revised Date: 2004-11-17 |
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: 254-8 Citation Subset: IM |
Affiliation:
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Meakins-Christie Laboratories, McGill University, Montreal, Canada H2X 2P2. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Balloon Dilatation Esophagus / physiology Exercise Test Humans Male Plethysmography, Whole Body Pulmonary Alveoli / physiology Respiratory Mechanics / physiology* Respiratory Muscles / physiology* Work of Breathing / physiology* |
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