Effect of forced expiration on thoracic gas volume in wheezy infants
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posted on 1990-01-01, 00:00 authored by C J Lanteri, J M Raven, Peter SlyPartial expiratory flow‐volume curves are commonly used in infant pulmonary function testing. The flow measurements are volume dependent and thoracic gas volume (TGV) is often measured in conjunction with forced expiratory maneuvers. Since it is not possible to make continuous, simultaneous measurements of TGV during forced expiration, it is assumed that lung volume returns to its original value after forced expiration. To test this assumption we measured TGV using a whole body plethysmograph in 14 wheezy infants before and after a series of forced expirations produced with an inflatable jacket. Forced expiration did not cause a significant change in group mean TGV measurements. Examination of individual data did not show any systematic difference between TGV measured before and after forced expiration. These results suggest that repeated forced expirations do not alter TGV within the time scale of usual pulmonary function testing protocols. Pediatr Pulmonal 1990; 9:220–223. Copyright © 1990 Wiley‐Liss, Inc., A Wiley Company
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Pediatric PulmonologyVolume
9Issue
4Pagination
220 - 223Publisher DOI
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8755-6863eISSN
1099-0496Usage metrics
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