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| A dual-respiration chamber system with automated calibration |
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| Author(s): Schoffelen PFM, Westerterp KR, Saris WHM, TenHoor F |
| Source: JOURNAL OF APPLIED PHYSIOLOGY Volume: 83 Issue: 6 Pages: 2064-2072 Published: DEC 1997 |
| Times Cited: 94 References: 22 |
| Abstract: This study characterizes respiration chambers with fully automated calibration. The system consists of two 14-m(3) 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 O-2 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 O-2 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. |
| Document Type: Article |
| Language: English |
| Reprint Address: Schoffelen, PFM (reprint author), UNIV LIMBURG, DEPT HUMAN BIOL, POB 616, NL-6200 MD MAASTRICHT, NETHERLANDS |
| Publisher: AMER PHYSIOLOGICAL SOC, 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 |
| Subject Category: Physiology; Sport Sciences |
| IDS Number: YK807 |
| ISSN: 8750-7587 |
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