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Apixaban for extended postoperative thromboprophylaxis in gynecologic oncology patients undergoing laparotomy.
Gynecologic Oncology 2023 March 10
INTRODUCTION: Venous thromboembolic events represent the second most frequent cause of mortality in cancer patients. Recent literature shows that direct oral anticoagulants (DOAC) are at least as effective and safe as low molecular weight heparin for postoperative thromboprophylaxis. However, this practice has not been broadly adopted in gynecologic oncology. The aim of this study was to evaluate clinical effectiveness and safety of apixaban for extended thromboprophylaxis in comparison to enoxaparin after laparotomies for gynecologic oncology patients.
METHODS: The Gynecologic Oncology Division at a large tertiary center transitioned from enoxaparin 40 mg daily to apixaban 2.5 mg BID for 28 days after laparotomies for gynecologic malignancies in November 2020. This real-world study compared patients post-transition (November 2020 to July 2021 (n = 112)) to a historical cohort (January to November 2020 (n = 144)), using the institutional National Surgical Quality Improvement Program (NSQIP) database. All Canadian gynecologic oncology centers were surveyed to assess postoperative DOAC utilization.
RESULTS: Patient characteristics were similar between groups. No difference was found between total venous thromboembolism rates (4% vs. 3%, p = 0.49). No difference was found in postoperative readmission (5% vs. 6%, p = 0.50). Of the 7 readmissions in the enoxaparin group, one was due to bleeding requiring transfusion; there were no readmissions for bleeding in the apixaban group. No patient required a reoperation for bleeding. Thirteen percent of the 20 Canadian centers have transitioned to extended apixaban thromboprophylaxis.
CONCLUSIONS: Apixaban for 28-day postoperative thromboprophylaxis was found to be an effective and safe alternative to enoxaparin after laparotomies in a real-world cohort of gynecologic oncology patients.
METHODS: The Gynecologic Oncology Division at a large tertiary center transitioned from enoxaparin 40 mg daily to apixaban 2.5 mg BID for 28 days after laparotomies for gynecologic malignancies in November 2020. This real-world study compared patients post-transition (November 2020 to July 2021 (n = 112)) to a historical cohort (January to November 2020 (n = 144)), using the institutional National Surgical Quality Improvement Program (NSQIP) database. All Canadian gynecologic oncology centers were surveyed to assess postoperative DOAC utilization.
RESULTS: Patient characteristics were similar between groups. No difference was found between total venous thromboembolism rates (4% vs. 3%, p = 0.49). No difference was found in postoperative readmission (5% vs. 6%, p = 0.50). Of the 7 readmissions in the enoxaparin group, one was due to bleeding requiring transfusion; there were no readmissions for bleeding in the apixaban group. No patient required a reoperation for bleeding. Thirteen percent of the 20 Canadian centers have transitioned to extended apixaban thromboprophylaxis.
CONCLUSIONS: Apixaban for 28-day postoperative thromboprophylaxis was found to be an effective and safe alternative to enoxaparin after laparotomies in a real-world cohort of gynecologic oncology patients.
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