“…This pooling occurs quickly and when produced experimentally by tourniquets applied to three extremities, has been shown to trap a volume equivalent to about 15 to 20 per cent of the total circulating volume within 10 minutes (2,3). Elevation of venous pressure, according to Starling's fundamental hypothesis, will, in addition, initiate a filtration of fluid out of the capillaries into the local tissues (1,2).…”