A STUDY ON THE PULMONARY FUNCTIONS AND THE PULMONARY CIRCULATION IN CARDIO-PULMONARY DISEASES : (II) Pulmonary Capillary Blood Flow and Pulmonary Capillary Mean Transit Time in Cardio-Pulmonary Diseases

Abstract

In healthy subjects and in patients with cardio-pulmonary diseases, pulmonary capillary blood flow (Qc) was measured by acetylene method and pulmonary capillary blood volume (Vc) was measured by CO single breath method. From these, pulmonary capillary mean transit time (t_c) was calculated. Relationships between tc and various hemodynamic parameters of pulmonary circulation in cardio-pulmonary diseases were examined. Further, effects of exercise on Vc, Qc and tc were examined.