Evaluation of efficacy and safety of a single dose Tranexamic acid in reducing blood loss during colorectal cancer surgery. A randomised, placebo controlled, double-blinded study.

Background and Aims: Colorectal cancer surgeries are commonly performed nowadays. They are considered as extensive procedures requiring perioperative blood transfusion in 32% to 68% of cases. The objective of this study was to evaluate the anti-haemorrhagic effects and safety of a single dose of tranexamic acid in such surgeries. Methods: Sixty patients scheduled for colorectal cancer surgeries were randomly assigned (TA) into two equal groups. Group TA received 10 mg/kg tranexamic acid in 100 ml of 0.9% NaCl immediately following induction of anaesthesia and control group received 100 ml 0.9% NaCl. The primary outcome was total blood loss reduction. The secondary outcomes were total number of patients requiring blood transfusion and occurrence of any thromboembolic events within 30 days after surgery. Results: Intraoperative and total blood loss were lower in TA group compared to the control group (P = 0.010, 0.003, respectively) while postoperative blood loss was comparable between both groups. The need for blood transfusion was lower in TA group (P = 0.038). Number of blood units transfused was also lower in TA group. Mean arterial blood pressure, serum creatinine and urine output in first 24 h postoperatively were comparable between both groups. Haemoglobin level in the first postoperative day was higher in TA group (P = 0.002), but was comparable between the groups at 2 weeks preoperative and from second up to fifth day postoperatively. Conclusion: A single dose of TA administered between induction and start of surgical procedure may reduce total blood loss and need of transfusion in colorectal cancer surgeries without any serious adverse effects.