Abstract

ObjectiveTo evaluate if lower activated coagulation time (ACT) value after neutralization than preoperative ACT value was effective in reducing bleeding, operative times, and post-operative transfusions in patients underwent coronary artery bypass grafting (CABG).MethodsRetrospective selection of 398 patients from January 2014 to May 2017. Patients were divided into 2 groups according to final ACT after neutralization: A - final ACT lower than preoperative ACT; and B - final ACT higher than or equal to preoperative ACT. Hemostatic time, intraoperative blood loss, ACT after final neutralization, mediastinal blood loss, and transfusion requirements were observed.ResultsThe hourly blood loss in the Group A was generally lower than in the Group B at first 3 hours, which has significant difference (P<0.05). However, there was no difference after 3 hours between the two groups. Operative time, intraoperative blood loss, mediastinal blood loss, transfusion requirements, and drainage in the first postoperative 12 hours in the Group A were lower than in Group B, which has significant difference (P<0.05).ConclusionAs a result, final ACT values lower than pre-heparinization ACT values are safe and lead to lower operative times, bleeding, and post-operative transfusions.

Highlights

  • Cardiopulmonary bypass (CPB) is a component of cardiac surgeries which requires full systemic heparinization before it is started[1]

  • Activated coagulation time (ACT) has been widely used to monitor the heparin’s intraoperative anticoagulant effect, it needs to exceed 480 seconds before starting CPB and it is required to be equal to the preoperative value after neutralization

  • We found out that after administering protamine (1:1 heparin) and adding additional protamine according to the ACT value after the first neutralization, some cases presented ACT values a little lower than pre-heparin ACT before transfer to intensive care unit (ICU)

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Summary

Methods

Retrospective selection of 398 patients from January 2014 to May 2017. Patients were divided into 2 groups according to final ACT after neutralization: A – final ACT lower than preoperative ACT; and B – final ACT higher than or equal to preoperative ACT. Hemostatic time, intraoperative blood loss, ACT after final neutralization, mediastinal blood loss, and transfusion requirements were observed

Results
Conclusion
INTRODUCTION
METHODS
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DISCUSSION
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