![]() ![]() From the partial pressures ( P a, P ¯V and P Ē respectively) we determined the excretion (Ē=P Ē/P ¯V), retention (R=P a/P ¯V) and the physiological dead space fraction ( V D,phys/ V T=(1 P Ē/P a) for each gas, where V T is tidal volume. After reaching steady state, samples of arterial blood, mixed venous blood and mixed expired air were taken simultaneously. ![]() ![]() Tracer amounts of acetone, ether and enflurane were infused continuously into a peripheral vein and a bolus of a mixture of krypton, Freon12 and SF 6 was introduced into the peritoneal cavity. The experiments were performed with dogs which were ventilated artifically with breathing patterns with different post-inspiratory breath holding times ( t a) of 0, 0.5, 1.0 and 2.0 s. In this study we have investigated the effects of breath holding and of the physical properties of gases on four different respiratory dead spaces ( V D): the Fowler, the physiological, the washout and the inert gas dead space. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |