[Tissue pressure of the leg]

The underlying concepts of the study of subcutaneous and intramuscular tissue pressure, which began in 1952, have been highly modified. Three types of methods are now used: direct needle puncture, the perforated capsule, and the microcatheter. The capsule and the catheter are sensitive to osmotic and hydrostatic tissue pressure, and the needle indicates an interstitial hydrostatic T.P. We prefer the latter method, which allows the total T.P. to be measured.