A patient presents with right to left shunt. Oxygen content in aerial and venous side are 18 and 14 ml/100 ml respectively. Oxygen content at pulmonary capillary is 20. What is the percentage shunting of cardiac output?
Normal O2 content Aerial - 20ml Venous - 14 ml Aeriovenous difference - 6 ml In the given condition, O2 content Aerial - 18 ml Venous - 14 ml Aeriovenous difference - 4 ml i.e. 1/3 of the normal is reduced in the given shunting. So, there will be a reduction of 33% or 2 ml
23%
33%
43%
53%
JIPMER 2017