Dr Henry Jefferson, Consultant Anaesthetist
#QuestionFeedback 15. Physiological Shunt A useful correction was highlighted regarding normal physiological shunting. It is VENOUS blood from the bronchial circulation that drains into the pulmonary veins, rather than the bronchial arteries themselves. This represents a normal anatomical right-to-left shunt, contributing to physiological venous admixture. Thebesian venous drainage into the left heart is another example.