Effects of forward acceleration on anatomical dead space

Autor:	P. Varene, Jean Timbal, Jean Demange, C. Jacquemin
Rok vydání:	1965
Předmět:	Physics Classical mechanics Physiology Physiology (medical) Mechanics Euler force Anatomical dead space
Zdroj:	Journal of Applied Physiology. 20:1205-1210
ISSN:	1522-1601 8750-7587
DOI:	10.1152/jappl.1965.20.6.1205
Popis:	The effects of transverse acceleration (1–5 G) on anatomical dead space have been studied on four human subjects. Instantaneous analysis of expired gases has been done by mass spectrometer. Half deflection between inspired gases and alveolar plateau levels is considered as the signal for the end of dead-space sweep. It is confirmed that no obstructive syndrome occurs during these accelerations. The airway size is not reduced; on the contrary, the anatomical dead space increases with the level of accelerations. Furthermore, a decreasing slope of the CO2 alveolar plateau has been noted on two subjects. These facts can be interpreted admitting a passive displacement of the pulmonary blood mass under influence of forward acceleration and the adjustment of ventilation to perfusion. transverse acceleration; mass spectrometer; ventilation-perfusion ratio Submitted on February 8, 1965
Databáze:	OpenAIRE
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