Abstract
Using a renal perfusion preparation on dogs, effects of changes in expiratory resistance (ER) on renal blood flow (RBF), carotid blood flow (CBF) and cardiac blood flow (CO) were comparatively observed. Results are as follows : 1) At 8 mmHg of ER, CO, CBF and RBF all markedly decreased cardiac blood flow. Recovery for RBF was significantly slow. PaO2 of the blood decreased markedly whereas PaCO2 increased slightly. 2) During hyperventilation and inhalation of oxygen, RBF, CO and CBF decreased slightly. 3) During inhalation of carbon dioxide, CO and CBF increased whereas RBF decreased markedly.
