Comparison of the value of cardiac output with different methods of hemodynamic monitoring

Abstract

The article deals with the physical basis for determining the parameters of central, peripheral hemodynamics and oxygen saturation with the help of photoplethysmography.A comparative study of the parameters of cardiac output and volume capillary peripheral blood flow in 34 patients with polytrauma was conducted. The purpose of the study was to consider the possibilities of modern photoplethysymometric technologies for assessing the state of peripheral and central hemodynamics, by comparing their results with the results of echosonographic study of central hemodynamics.Indicators of central hemodynamics in the examined patients were determined using the photoplethysmographic technology of Nihon Kohden, as well as with transthoracic echosonography. The evaluation of the state of the peripheral capillary blood flow was determinate with using Masimo Rainbow’s photoplace micrometric technology.The decrease of cardiac output and peripheral capillary blood flow with the increase of the severity of shock was revealed. Successful anti-shock measures that ensure the growth of cardiac output and arterial vascular tone, were associated with an increase in volume capillary flow. When comparing the results of photoplethysmographic and ultrasound technologies of hemodynamic evaluation, results are obtained that match the value of the values of cardiac output with a linear correlation coefficient of Pearson 0.983. Photoplethysmographic monitoring accurately reflects the clinical picture of shock and the effectiveness of intensive care.