Thoracic Epidural Anesthesia and Prophylactic Three Times Daily Unfractionated Heparin Within an Enhanced Recovery After Surgery Pathway for Colorectal Surgery.

Background and Objectives: Venous thromboembolism (VTE) is a common cause of preventable harm. Perioperative thoracic epidural analgesia (TEA) presents a challenge to optimal VTE prophylaxis. Our primary aim was to characterize missed doses of VTE prophylaxis associated with epidural catheter placement and removal. Our secondary aim was to measure the effect of an enhanced recovery after surgery (ERAS) pathway on the rate of TEA-associated missed VTE prophylaxis. Methods: We retrospectively reviewed a prospectively collected database of 1264 colorectal surgery patients at a single academic center. Missed preoperative doses between TEA patients and non-TEA patients were compared. Missed postoperative unfractionated heparin (UFH) doses associated with epidural removal were compared before and after implementation of an ERAS program. Other data collected included demographic data, surgical indication, and thrombohemorrhagic complications. Results: Of the 445 TEA patients, 12.6% missed their preoperative heparin doses compared with 8.4% of patients without epidurals (P = 0.017). Of the TEA patients prescribed 3 times daily UFH, 22.5% missed one or more doses associated with epidural removal. The percent of patients missing at least one dose of UFH on epidural removal dropped from 28.1% before ERAS to 17.9% after the ERAS program (P = 0.023). Seven patients developed VTEs. There were zero epidural hematomas. Conclusions: Thoracic epidural analgesia was associated with a 1.5-fold increased risk of missed dose of preoperative VTE prophylaxis, which was not affected by implementation of an ERAS program. The implementation of an ERAS program reduced missed doses associated with epidural removal. This study highlights the challenge posed by providing VTE prophylaxis in the setting of perioperative neuraxial analgesia. Copyright (C) 2017 by American Society of Regional Anesthesia and Pain Medicine.

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