Barts and The London, School of Medicine and Dentistry

Define the term ventilation perfusion ratio (Va/Q) and give values for the whole lung, the base and the apex of the lung in a normal subject in the upright position, explaining why these differ. Illustrate, by means of diagrams, how the perfusion of the lung may be considered as a 'three zone model'.


This learning outcome is a primary level outcome.


This learning outcome is taught in the following sessions: