Conjunctival and tonsillar biopsies in sarcoidosis.

CHEST, 78: 6, DECEMBER, 1980 than in the group in which Qsp did not increase (13.3 ± 1.2 vs 27.5 ± 3.1 percent, mean ± SE, p < .001). Qsp with 100 percent oxygen may increase as a result of absorption atelectasis and redistribution of regional pulmonary blood flow to poorly or nonventilated lung areas. However, a decline in Qsp with 100 percent oxygen may result from a decrease in “shunt like” effects produced by low V/Q areas or diffusion impairment It has been suggested that the change in Qsp with increasing F1o2 is a result of the interaction between those factors which will increase and those which will decrease ( sp. Our data suggest that this interaction favors an increase in ()sp with 100 percent oxygen in those patients where Qsp at the maintenance Flo, is low, but does not in more severely ill patients where Qsp at the maintenance Flo, is higher. We agree that measurement of Qsp after administration of 100 percent oxygen may be misleading and may result in