<原著>虚血式色素濃度較正イヤーピース色素希釈法による心拍出量測定追補

概要

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In order to investigate the validity of earpiece dye-dilution method (ED), simultaneous measurements of cardiac output together with the cuvette dye-dilution technique using whole blood calibration (WC) and dynamic calibration (DC) methods were performed at rest in supine position in 18 subjects without intracardiac shunt. A dichromatic earpiece densitometer (Nihonkoden MLC-4100) which can calibrate automatically dye concentration without blood sampling was used in the present study. The cuvette dye-dilution curves were recorded by a Gilford dye densitometer Model 140,cardiac output system. Cardiac outputs by ED were significantly correlated with WC ; r=0.85,y=0.65x+1.63,p<0.001 and DC ; r=0.86,y=0.80x+1.55,p<0.001,respectively. A good correlation was also obtained between WC and DC ; r=0.90,y=1.07x+0.19,p<0.001. Thus, the present data indicates that earpiece dye-dilution method is reliable for cardiac output measurement and advantageous for clinical use because of non-invasive technique.
1978-04-25