VOLUME CHANGES OF THE CALF DURING TEN MINUTES‘ VENOUS STASIS

Abstract
Volume changes were examined in ten normal young experimental subjects by measurements on the calf with an air‐filled rubber cuff plethysmograph during venous stasis. Part of the experiment was performed while breathing 10% oxygen in nitrogen. The interpretation of the volume changes is discussed, and it is suggested that from the fourth minute they are an expression of capillary filtration rate. After the initial rise, which is due to arterial blood flow, there is a transition phase where the volume increase is due to both venous filling and capillary filtration. Ten minutes' breathing of 10% oxygen in nitrogen gave no changes in capillary filtration rate.