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Abstract

Bioengineering

Effects of Extracorporeal Membrane Oxygenation on the Coagulation System

Published: February 23rd, 2024

DOI:

10.3791/66433

1Department of Cardiopulmonary Bypass, Fuwai Hospital, National Center for Cardiovascular Disease, State Key Laboratory of Cardiovascular Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, 2Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, 3Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University
* These authors contributed equally

Abstract

This study aimed to investigate the effects of long-term awake extracorporeal membrane oxygenation (ECMO) on the coagulation system in a sheep model. A total of ten healthy sheep were included in the study, with 5 sheep in each group. In the veno-arterial ECMO (V-A ECMO) group, cannulation was performed in the right carotid artery and the right external jugular vein. In the veno-venous ECMO (V-V ECMO) group, a dual-lumen catheter was utilized to insert into the right external jugular vein. After initiating ECMO, the sheep were recovered from anesthesia and remained awake for 7 days. The target activated clotting time (ACT) goal was set at 220-250 s. In both groups, the actual ACT fluctuated around 250 s with the dose of heparin gradually increasing, reaching almost 60 IU/kg/min at the end of the experiments. Moreover, the activated partial thromboplastin time (APTT) and thrombin time (TT) values were significantly higher in the V-A ECMO group compared to the V-V ECMO group, despite receiving the same doses of heparin. Although laboratory test results fluctuated within a normal and reasonable range, infarct foci in the kidneys were observed in both groups at the end of the study.

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