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The Journal of Cardiovascular Surgery 2010 April;51(2):257-64

Copyright © 2010 EDIZIONI MINERVA MEDICA

lingua: Inglese

Application of low-volume zero-balanced ultrafiltration and its effect on blood propofol concentration: a randomized controlled trial

Wang J. 1, Wu J. J. 1, Ren X. Y. 1, Chen C. L., Qiao J. 2, Abudureheman M. 2, Zheng H. 1

1 Departments of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical Universit Urumqi, China; 2 Department of Cardiac Surgery, The First Affiliated Hospital of Xinjiang Medical University Urumqi, China


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AIM: The aim of this study was to evaluate the effectiveness of low-volume zero-balanced ultrafiltration during cardiopulmonary bypass in heart valve replacement surgery.
METHODS: This was a randomized, double-blind, controlled study carried out in the operating room. Forty patients of ASA grade II-III, elected to undergo heart valve replacement surgery, were enrolled. All patients were randomly assigned to either a low-volume (35 mL/kg) zero-balanced ultrafiltration group (N.=20) or to a control group (N.=20). Blood propofol concentrations and entropy index were measured using cardiopulmonary bypass. Concentrations of plasma tumor necrosis factor-a (TNF-a), interleukin-6 (IL-6), interleukin-10 (IL-10), and cardiac troponin I were measured before and after the end of cardiopulmonary bypass and corrected according to hematocrit.
RESULTS: Blood levels of cardiac troponin I, TNF-a, IL-6, and IL-10 after surgery were all significantly lower in the ultrafiltration group than in the control group (P<0.05) after the end of bypass. Blood propofol concentrations decreased significantly in both groups during cardiopulmonary bypass and remained significantly lower in the ultrafiltration group than the control group. However, there was no significant difference between the two groups in the entropy index (P=0.5583).
CONCLUSION: Low-volume zero-balanced ultrafiltration performed during cardiopulmonary bypass surgery significantly decreased post-bypass levels of the cytokines, TNF-a, IL-6, IL-10, and postoperative cardiac troponin I. Blood propofol concentration was also decreased; however, the depth of anesthesia was not affected significantly.

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