The Effects of Perioperative Ketorolac Infusion on Platelet Function and Blood Loss: Comparison of Anesthesia Methods. |
Young Soon Choi, Gaab Soo Kim, Jin Hye Min, Jeong Jin Lee, Ik Soo Chung |
1Department of Anesthesiology and Pain Medicine, College of Medicine, Kwandong University, Goyang, Korea. ysc1003@yahoo.co.kr 2Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. |
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Abstract |
BACKGROUND The purposes of this study were to investigate the effects of perioperative continuous infusion of ketorolac on platelet function and blood loss under either general or spinal anesthesia. METHODS The patients under general anesthesia received saline 1 ml (C group) or ketorolac 30 mg (GK group) intravenously 10 min before skin incision, followed, respectively, by a continuous infusion of saline (4 ml/h) or ketorolac (2.5 mg/h) for 24 h. The patients under spinal anesthesia (SK group) received the same amount of ketorolac as that of the GK group. Blood loss was collected and measured at 3 h, 6 h, 12 h and 24 h postincision. Platelet count, hemoglobin, platelet aggregometry (PA) with adenosine diphosphate (ADP) and collagen, and bleeding time (BT) were measured at 30 min before skin incision and at 3 h and 24 h postincision. Blood coagulation status was analysed using thromboelastography (TEG) at 30 min before skin incision and at 3 h postincision. RESULTS BT in the SK group at postincision increased significantly compared to preoperative value and were significantly higher than those of the GK and C group. PA with collagen at 3 h after skin incision was lower in the SK group than in the C group. There were no significant differences in any of the TEG variables among the three groups. No significant differences were observed in blood loss among the three groups. CONCLUSIONS Blood loss was not increased by ketorolac under either general or spinal anesthesia, although platelet function was impaired under spinal anesthesia. |
Key Words:
blood loss; ketorolac; platelet function |
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