[Determination of the microcirculatory blood flow by pulp plethysmography].

A method for clinical determination of blood inflow at the tip of digit, using mercury strain gauge plethysmography with venous occlusion, is presented, including a satisfactory way of calibration of the "closed type" gauges. Theoretical considerations and experimental data allow to consider the accuracy of the method (of +/- 7 p.cent) to be of clinical value.