alveolocapillary block

al·ve·o·lo·cap·il·lar·y block

the presence of material that impairs the diffusion of gases between the air in the alveolar spaces and the blood in alveolar capillaries; block can be caused by edema, cellular infiltration, fibrosis, or tumor, and results in undersaturation of peripheral arterial blood with oxygen.

al·ve·o·lo·cap·il·la·ry block

(al-vē'ŏ-lō-kap'i-lar-ē blok)
The presence of material that impairs the diffusion of gases between the air in the alveolar spaces and the blood in alveolar capillaries; block can be caused by edema, cellular infiltration, fibrosis, or tumor, and results in undersaturation of peripheral arterial blood with oxygen.