Document Detail

Calibration of respiratory inductive plethysmograph during natural breathing.
MedLine Citation:
PMID:  2917945     Owner:  NLM     Status:  MEDLINE    
We describe a single-posture method for deriving the proportionality constant (K) between rib cage (RC) and abdominal (AB) amplifiers of the respiratory inductive plethysmograph (RIP). Qualitative diagnostic calibration (QDC) is based on equations of the isovolume maneuver calibration (ISOCAL) and is carried out during a 5-min period of natural breathing without using mouthpiece or mask. In this situation, K approximates the ratio of standard deviations (SD) of the uncalibrated changes of AB-to-RC volume deflections. Validity of calibration was evaluated by 1) analyzing RIP waveforms during an isovolume maneuver and 2) comparing changes of tidal volume (VT) amplitude and functional residual capacity (FRC) level measured by spirometry (SP) with RIP values. Comparisons of VT(RIP) to VT(SP) were also obtained in a variety of postures during natural (uninstructed) preferential RC and AB breathing and with voluntary changes of VT amplitude and FRC level. VT(RIP)-to-VT(SP) comparisons were equal to or closer than published reports for single posture, ISOCAL, multiple- and linear-regression procedures. QDC of RIP in supine posture with comparisons to SP in that posture and others showed better accuracy in horizontal than upright postures.
M A Sackner; H Watson; A S Belsito; D Feinerman; M Suarez; G Gonzalez; F Bizousky; B Krieger
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  66     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1989 Jan 
Date Detail:
Created Date:  1989-04-06     Completed Date:  1989-04-06     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  410-20     Citation Subset:  IM    
Division of Pulmonary Disease, University of Miami School of Medicine, Mount Sinai Medical Center, Florida 33140.
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MeSH Terms
Functional Residual Capacity
Models, Theoretical
Plethysmography / methods*
Tidal Volume
Grant Support
Comment In:
J Appl Physiol (1985). 1999 Aug;87(2):869-72   [PMID:  10484687 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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