Direct Fick method of measuring cardiac output requires estimation of: (A) O2 content of aerial blood, (B) O2 content of venous blood, (C) O2 consumption per unit time, (D) All of the above
Answer is D. Applying Fick&;s principle Output of left ventricle =Cardiac output= O2 consumption (mL/min)/ - Therefore this method requires the following valuesO2 consumption per unit time=Aerial O2 content =Venous o2 contentRef: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:513