Background: Whether the risk of venous thromboembolism (VTE) may be reduced by preoperative administration of prophylactic heparin is unknown. We hypothesized that timing of heparin administration does not significantly alter the incidence of VTE in pancreatic surgery.
Methods: An analysis was conducted using data from Massachusetts General Hospital's National Surgical Quality Improvement Program from 2012 to 2017. All patients admitted for elective pancreatic resection were included. The primary outcome was development of VTE. Multivariable regression was performed, adjusting for patient demographics and various clinical factors.
Results: In total, 1448 patients were analyzed, of whom 1062 received preoperative heparin (73.3%). Overall, 36 (2.5%) patients developed VTE. On unadjusted analysis, there was no statistically significant difference between patients who received preoperative heparin compared with those who did not (2.6% vs. 1.3%, respectively; p = 0.079). On adjusted analysis, there was an association with increased VTE rates among patients who received preoperative heparin (OR 2.93, 95% CI 1.10-7.81; p = 0.031).
Conclusion: There was an association between preoperative heparin administration and increased incidence of VTE on adjusted analysis, possibly reflecting appropriate surgical judgment in patient selection for prophylaxis. These data question the inclusion of preoperative VTE pharmacologic prophylaxis as a reliable quality indicator.
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