diffusing capacity (redirected from Diffusion capacity)

dif·fus·ing capacity (d-fyzng)

n.

The capacity of the alveolocapillary membrane to transfer gas.

---

diffusing capacity

the rate at which a gas diffuses across the alveolar-capillary membrane per unit difference in the partial pressure of the gas across the membrane, expressed in ml/min/mmHg. Because of their high affinity for hemoglobin both oxygen and carbon monoxide are limited in their rate of diffusion by their diffusing capacity.