Transthoracic admittance plethysmograph for measuring cardiac output.
A plethysmograph for measuring ventricular stroke volume (SV) from the transthoracic admittance variation was developed. A correlation study between the SV values determined by this method (SVy) and those measured by Kubicek's transthoracic impedance method (SVz) was carried out on 24 healthy subjects; the correlation coefficient was r = 0.99 and the regression line of SVY on SVz was y = 1.03x - 0.47. Based on the results obtained through the study, it was concluded that the admittance method was more advantageous than the impedance method for measuring SV.
D002302:Cardiac Output; D004566:Electrodes; D004594:Electrophysiology; D006801:Humans; D010991:Plethysmography / Q000295:instrumentation / Q000379:methods*; D010992:Plethysmography, Impedance / Q000379:methods; D013909:Thorax / Q000502:physiology