Influence of abdominal gas on the Boyle's law determination of thoracic gas volume
- 1 March 1978
- journal article
- research article
- Published by American Physiological Society in Journal of Applied Physiology
- Vol. 44 (3), 469-473
- https://doi.org/10.1152/jappl.1978.44.3.469
Abstract
In a body plethysmograph we have demonstrated differences in total lung capacity (TLC) derived from panting maneuvers performed at different levels in the vital capacity. In almost all cases, the discrepancies were due to the magnitude of the abdominal gas volume (AGV) and the relative magnitude of abdominal and thoracic pressure swings during the panting mandeuver. When panting was performed at functional residual capacity (FRC), the effect of AGV compression on the determination of thoracid gas volume (TGV) was small. Of 11 individuals studied 2 were known to have mild asthma. Compression and decompression of AGV appeared to be an insufficient explanation for discrepancies in derived TLC's in these two, suggesting that other as yet unidentified factors may influence the plethysmographic determination of TGV.This publication has 2 references indexed in Scilit:
- Die GanzkörperplethysmographieRespiration, 1968
- Roentgenologic, physiologic and structural estimations of the total lung capacity in normal and emphysematous subjectsAmerican Journal Of Medicine, 1967