Interaction of Anti-G Measures and Chest Wall Mechanics in Determining Gas Exchange

摘要

This project represents an extension of an earlier project designed to examine factors influencing gas exchange during acceleration stress. Included in this report are studies dealing with the influence of the chest wall on regional intrapleural pressure during +Gz stress; influence of G-suit abdominal bladder inflation on gas exchange during +Gz stress; influence of the chest wall on gas exchange during mechanical ventilation; characterization of in vivo pressure-volume relationships of the pig's respiratory system; and mechanics of the pulmonary vasculature. Results indicate that the chest wall plays a significant role in determining gas exchange parameters during +Gz stress, during application of +Gz protective measures and during mechanical ventilation. (Author)