Abstract
By dividing total fingertip blood flow into its two component parts, arteriovenous-shunt flow and the nutritionally important capillary flow, Coffman and Cohen (see page 259) have made some interesting observations in patients with Raynaud's phenomenon. Some of the seemingly contradictory reports of total hand or finger blood flow in patients with Raynaud's phenomenon might have been less confusing if previous investigators had measured capillary as well as total flows. The relative contributions of capillary flow and arteriovenous-shunt flow to total flow vary so greatly under different circumstances that it would be hazardous if not impossible to estimate capillary flow from . . .
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