Non-invasive cardiac output monitoring in patients with polytrauma

N.V. Matolinets


Background. Cardiac output monitoring is consi­dered to be a standard for evaluation of central hemodynamic parameters and response to fluid therapy. Innovative technology for non-invasive estimated continuous cardiac output (esCCO) allows measure it in on-line mode, which is designed to enhance monitoring of patients’ hemodynamic status. The purpose of the study was to evaluate the effectiveness and expediency of non-invasive continuous monitoring of cardiac output using esCCO technology in polytrauma patients during the acute stage. Materials and methods. Data from clinical examination and treatment of 40 patients with polytrauma who were admitted to the intensive care unit of Lviv Municipal Clinical Emergency Hospital are presented. In addition to routine measurements, central hemodynamic parameters were monitored in 20 patients from group 1 using the esCCO integrated into the Life Scope monitor (Nihon Kohden, Japan). In the control group (n = 20), only traditional indexes such as non-invasive blood pressure (BP), electrocardiogram, hemoglobin oxygen saturation (SpO2) were registered using multifunctional Philips IntelliVue (MP20) monitors, and standard laboratory tests were conducted for the comparative analysis. Results. From the first to the second day in both groups, statistically significant changes in laboratory tests were observed: the level of hematocrit decreased from 32.0 ± 1.0 % to 29.0 ± 0.8 % (p < 0.01); the hemoglobin content reduced from 91.5 ± 2.1 g/l to 87.0 ± 1.9 g/l (p < 0.05) on average; the leukocyte count increased from (9.8 ± 0.4) • 106 to (12.0 ± 0.5) • 106 (р < 0.001) on average. These changes indicate the development of anemia, systemic inflammatory reaction that has a significant effect on the rheological properties of the blood and hemodynamics. Stable blood pressure parameters were registered in patients from group 1 (systolic BP 122.9 ± 6.2 mm Hg, diastolic BP 69.7 ± 2.3 mm Hg) compared to the control group (systolic BP 112.2 ± 5.9 mmHg, diastolic BP 67.5 ± 2.1 mmHg). The decrease in the volume of infusion the­rapy by 13.5 % and of early complications by 11.5 % was observed in patients from group 1 compared to the controls. Conclusions. We have established that in the state of traumatic shock with a following systemic inflammatory reaction, rheological changes that potentiate hemodynamic insufficiency occur. EsCCO is a simple non-invasive monitoring method, which provides an opportunity to accelerate the optimization of patient’s hemodynamic status in polytrauma.


cardiac output; hemodynamic monitoring; polytrauma


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