Document Detail

A dual-respiration chamber system with automated calibration.
MedLine Citation:
PMID:  9390982     Owner:  NLM     Status:  MEDLINE    
This study characterizes respiration chambers with fully automated calibration. The system consists of two 14-m3 pull-type chambers. Care was taken to provide a friendly environment for the subjects, with the possibility of social contact during the experiment. Gas analysis was automated to correct for analyzer drift and barometric pressure variations and to provide ease of use. Methods used for checking the system's performance are described. The gas-analysis repeatability was within 0.002%. Results of alcohol combustion (50-350 ml/min CO2) show an accuracy of 0.5 +/- 2.0 (SD) % for O2 consumption and -0.3 +/- 1.6% for CO2 production for 2- to 24-h experiments. It is concluded that response time is not the main factor with respect to the smallest practical measurement interval (duration); volume, mixing, gas-analysis accuracy, and levels of O2 consumption and CO2 production are at least equally important. The smallest practical interval was 15-25 min, as also found with most chamber systems described in the literature. We chose to standardize 0.5 h as the minimum measurement interval.
P F Schoffelen; K R Westerterp; W H Saris; F Ten Hoor
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  83     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1997 Dec 
Date Detail:
Created Date:  1998-02-10     Completed Date:  1998-02-10     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:  2064-72     Citation Subset:  IM    
Department of Human Biology, Maastricht University, 6200 MD Maastricht, The Netherlands. P.Schoffelen@HB.UNIMAAS.NL
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MeSH Terms
Atmosphere Exposure Chambers* / standards
Calorimetry, Indirect
Carbon Dioxide / analysis
Oxygen / analysis
Oxygen Consumption
Respiratory Mechanics / physiology*
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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