| Validating facemask use for gas exchange analysis in patients with congestive heart failure. | |
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MedLine Citation:
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PMID: 11314290 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: Functional limitation, often associated with congestive heart failure (CHF), is most accurately assessed with measurement of peak VO2 (VO2peak) during exercise testing. VO2peak strongly predicts survival in CHF patients and is used to triage patients for cardiac transplantation. However, the traditional mouthpiece/noseclip equipment used for gas exchange analysis is often cumbersome and uncomfortable. Several alternative facemask designs tested previously in healthy cohorts were inferior to the mouthpiece for measuring VO2peak. In this study, a series of facemasks designed specifically for VO2peak testing (Hans-Rudolph) was employed. Although previously validated in healthy young adults, this apparatus has not been validated in patients with severe CHF. METHODS: The Hans-Rudolph facemasks were compared with the mouthpiece apparatus in 30 patients with severe CHF. Each subject completed a cardiopulmonary exercise test with each device. Twelve subjects were randomized to evaluate a possible training effect. To enhance recruitment, 18 additional subjects were recruited after they had completed a test with the mouthpiece. RESULTS: There was no evidence of a training effect and no differences in gas exchange measurements were found between the two devices. The weight-adjusted VO2peak measurements were 17.1 +/- 5.3 ml O2/kg/min for the mouthpiece group and 17.3 +/- 5.6 ml O2/kg/min for the mask group (P = 0.54). CONCLUSIONS: The facemask was shown to be equivalent to the mouthpiece for measuring VO2peak in CHF patients. Concerns of hypoventilation and decreased VO2peak associated with previous facemask designs were not substantiated. Since successful exercise testing depends on maximal exertion, providing a choice of equipment may facilitate cooperation without sacrificing accuracy. |
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Authors:
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D A Baran; E Rosenwinkel; D K Spierer; J Lisker; J Whelan; M Rosa; R L Goldsmith |
Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Validation Studies |
Journal Detail:
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Title: Journal of cardiopulmonary rehabilitation Volume: 21 ISSN: 0883-9212 ISO Abbreviation: J Cardiopulm Rehabil Publication Date: 2001 Mar-Apr |
Date Detail:
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Created Date: 2001-04-20 Completed Date: 2001-09-13 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8511296 Medline TA: J Cardiopulm Rehabil Country: United States |
Other Details:
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Languages: eng Pagination: 94-100 Citation Subset: IM |
Affiliation:
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Mt. Sinai Medical Center, Department of Medicine, Division of Cardiology, 1 Gustave L. Levy Place, Box 1030, New York, NY 10029, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Controlled Clinical Trials as Topic Cross-Over Studies Equipment Design Exercise Test* Female Heart Failure / physiopathology* Humans Male Masks* Middle Aged Oxygen Consumption / physiology* Prognosis Pulmonary Gas Exchange* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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