Independence of Capillary Filtration and Tissue Clearance

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Abstract
Radioactive Na24 or I131 in isotonic saline was injd. subcut. on the back of the hand which had previously been vasodilated by heat. The rate of removal of the injd. ions was measured by a counter placed over the injn. site. In some expts. 12.5% serum albumin was also injd. to produce filtration from the capillaries. Since this did not alter the clearance rate of the Na24 or I131, it is concluded that exchange of crystalloid solutes across the capillary wall is independent of filtration.