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Korean J Anesthesiol. 2005 Mar;48(3):235-240. Korean. Original Article.
Kim SH , Kwak YL , Oh YJ , Shinn HK , Kim SH , Hong YW .
Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, Korea.
Department of Anesthesia and Pain Medicine Research Institute, Yonsei University College of Medicine, Seoul, Korea.
Department of Anesthesiology and Pain Medicine, College of Medicine, Inha University, Incheon, Korea.

BACKGROUND: Aspirin has been shown to effectively increase survival and reduce morbidity in patients with ischemic heart disease. Continued aspirin use during the preoperative period could increase the postoperative blood loss in patients who have on-pump coronary artery bypass grafting. This study aimed to determine the effect of continued aspirin use before off-pump CABG on intraoperative and postoperative bleeding and coagulation profile in thromboelastography. METHODS: In 43 patients undergoing OPCAB, they were assigned aspirin user (n = 22), who received aspirin until the day of operation or nonaspirin user (n = 21), who discontinued aspirin before 7 days before the surgery. Intraoperative and postoperative bleeding and transfusion requirement were measured. TEG was performed and R, K, alpha angle, maximum amplitude and TEG index was measured at preinduction and at 24 hours after surgery. RESULTS: There were no differences in patient characteristics between aspirin users and nonaspirin users. We found no significant difference between postoperative bleeding and blood product requirements for the two groups. Similarly, we found no significant difference in the coagulation profiles. CONCLUSIONS: The use of aspirin continued preoperatively does not increase intraoperative and postoperative blood loss, and blood product requirement and influence on coagulation profile.

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