pulmonary diffusing capacitymedical dictionary

The ability of the alveolocapillary membrane to transfer gas. This is a reflection of the thinness and area of the alveolocapillary membrane. The diffusing capacity is a measure of the amount of gas transferred per minute from the alveolar gas to the pulmonary capillary blood divided by the mean pressure gradient of the gas between the alveolar gas and the capillary blood.

(12 Dec 1998)