METHOD FOR BIOIMPEDANCE DETECTING THE VOLUMES OF BODY LIQUID Russian patent published in 2005 - IPC

FIELD: medicine.

SUBSTANCE: the method deals with measuring geometric body size and electric impedances of patient's hands, body and legs at their probing with low- and high-frequency current due to current and potential electrodes applied onto distal parts of limbs, and, thus, detecting extracellular, cellular and total volumes of liquid in patient's hands, body and legs. While implementing the method one should additionally apply current electrodes onto left-hand and right-hand parts of neck, and potential electrodes - onto distal femoral parts. Body impedance (Z_b) should be measured due to successive measuring the impedance of its right-hand Z_rb and left-hand Z_lb parts at probing current coming between electrodes of similar sides of patient's neck and legs to detect Z_b, as Z_b = Ѕ x (Z_rb + Z_lb), impedance of legs Z_l should be detected due to measuring femoral impedance Z_f and that of shins Z_s, as Z_l = Z_f + Z_s. At detecting the volumes of liquid in body and legs one should apply measured values of Z_b and Z_l, moreover, as geometric body size one should apply the distance against the plane coming through the upper brachial surface up to the middle of radiocarpal articulation in case of patient's hand being along the body.

EFFECT: higher accuracy of detection.

5 dwg, 2 ex, 3 tbl