Patent ID: 7783345

Claim:
A non-invasive method for measuring the volume, the composition and the movement of electroconductive body fluids, based on the electrical impedance of the body or a body segment, especially for performing electromechanocardiography (ELMEC) or impedance cardiography (IKG) measurements for determining hemodynamic parameters, wherein an alternating measuring current of at least one frequency is introduced into the body by means of measuring electrodes attached to the body surface, wherein the impedance and temporal variations thereof of essentially the same body segment through which the alternating measuring current flows are measured for at least two different measuring lengths (L, L 2 , L 3 , L 4 , L 5 ), essentially in the longitudinal direction of the body, and wherein the impedance is sensed at the thorax close to the inferior and superior thoracic apertures for at least two different measuring lengths (L, L 2 , L 3 , L 4 , L 5 ) of essentially the same body segment.