LAUSR

The use of minimally invasive approaches to hepatectomy has increased in recent years, but the risk of postoperative venous thromboembolism (VTE) is undefined. We aimed to compare VTE rates after open hepatectomy and minimally invasive hepatectomy using an administrative dataset. Patients with primary or metastatic liver tumors were identified in the National Surgical Quality Improvement Program-targeted hepatectomy database (2016–2018). VTE was compared between patients who underwent open or minimally invasive hepatectomy after a propensity score matching of 1:1 for demographics, comorbidities, and operative factors. A total of 6935 patients underwent open hepatectomy and 2237 underwent minimally invasive hepatectomy. After matching, there were 1968 patients per group without differences in demographics, comorbidities, or operative variables. Prior to matching, the VTE rate was higher among patients who underwent open hepatectomy (2.8% vs. 1.1%, p < 0.001), and open hepatectomy was independently associated with VTE (OR = 1.90, p = 0.006). The VTE rate remained higher among open hepatectomy compared to minimally invasive hepatectomy after matching (2.4% vs. 1.1%, p = 0.003). Open hepatectomy was associated with a higher VTE rate in patients undergoing minor (1.9 vs. 1.0%, p = 0.028) and major hepatectomy (5.0 vs. 1.9%, p = 0.045). Patients who undergo an open hepatectomy for malignancy have a higher incidence of postoperative VTE compared to minimally invasive hepatectomy for both minor and major hepatectomy.