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Adherence to guidelines for the management of excessive warfarin anticoagulation

Emily B Devine1, Alan W Hopefl, Ann K Wittkowsky

  • 1Pharmaceutical Outcomes Research and Policy Program, University of Washington, Box 357630, Seattle, WA 98195-7630, USA. bdevine@u.washington.edu

Journal of Thrombosis and Thrombolysis
|May 10, 2008
PubMed

Insights

Physician adherence to warfarin management guidelines is low. Inappropriate vitamin K1 use, including excessive dosing and incorrect administration, leads to poor adherence and patient outcomes.

Area of Science:

  • Pharmacology
  • Clinical Medicine
  • Evidence-Based Practice

Background:

  • The American College of Chest Physicians (ACCP) established guidelines for managing excessive anticoagulation in warfarin patients.
  • Warfarin management requires careful monitoring to prevent bleeding and thromboembolic events.

Purpose of the Study:

  • To evaluate practice patterns and adherence to ACCP guidelines for excessive anticoagulation management.
  • To identify factors contributing to guideline non-adherence in a multi-site setting.

Main Methods:

  • A prospective cohort study observed 417 patients with an INR >= 4.5 across 22 centers.
  • Therapeutic management was documented, and adherence to ACCP guidelines was assessed retrospectively.

Main Results:

  • The mean initial INR was 7.7; 15% of patients were seriously bleeding at enrollment.
  • Treatment deviated from guidelines for 41% of patients, with 15% undertreated and 48% overtreated.
  • Non-adherence stemmed from excessive vitamin K1 doses and inappropriate administration routes.

Conclusions:

  • Adherence to ACCP guidelines for excessive anticoagulation is suboptimal.
  • Inappropriate vitamin K1 administration is the primary driver of non-adherence.
Abstract

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