Impact of Preoperative Continued Aspirin Therapy on Perioperative Bleeding Complications in Patients Undergoing Gastrectomy for Malignancy.

Background The question of whether antiplatelet therapy (APT) should be discontinued prior to gastrectomy is controversial. In this study, we investigated the impact of continuing aspirin preoperatively on perioperative bleeding and thromboembolic complications in patients receiving gastrectomy for malignancy. Methods The study cohort comprised 1001 patients with malignant gastric tumors who had undergone gastrectomy between 2005 and 2021. This study excludes emergency surgery. The patients were allocated to the following three groups: those who continued aspirin monotherapy prior to surgery (cAPT group), those who stopped receiving it seven days prior to surgery (dAPT group), and those who did not take APT at any stage (non-APT group). The differences between the groups in intraoperative and postoperative complications, such as bleeding and thromboembolism, were examined. Results The non-APT group comprised 682 patients, the dAPT group had 164, and the cAPT group had 155. There were 22 bleeding events (2.2%) in the whole cohort, 11 (1.1%) of which occurred in the non-APT group, six (3.7%) in the dAPT group, and five (3.2%) in the cAPT group. The differences between the three groups were not significant in terms of bleeding complications. There were 10 (1.0%) thromboembolic events in the whole cohort, five (0.7%) of which occurred in the non-APT group, four (2.4%) in the dAPT group, and one (0.6%) in the cAPT group. The differences between the three groups were not significant in terms of thromboembolic complications. In a multivariate analysis of the whole cohort, intraoperative blood loss (≥1000 mL) (p < 0.001, odds ratio (OR) = 11.8) and multidrug APT (p < 0.001, OR = 7.8) were both independent predictors of bleeding complications. However, continuing to take aspirin before surgery was not a risk factor for bleeding complications. Conclusions In patients with malignant gastric tumors, preoperative continuation of aspirin monotherapy has no impact on either intraoperative or postoperative bleeding. Gastrectomy can be performed safely, even in patients who continue aspirin treatment.