The recommendations in the following tables were adapted from the 2010 Consensus Conference of the American Society of Regional Anesthesia and Pain Medicine, “Regional Anesthesia in the Patient Receiving Antithrombotic or Thrombolytic Therapy (Third Edition).” Reg Anesth Pain Med 2010; 35(1):64–l01 and Fleischmann KH, et al. Practice guidelines often fail to keep pace with the rapid evolution of medicine: a call for clinicians to remain vigilant and revisit their own practice patterns. Reg Anesth Pain Med 2010; 35(1):4–7. Variances from the recommendations may be acceptable based on the judgment of the responsible anesthesiologist. The recommendations are designed to encourage quality patient care and safety but cannot guarantee a specific outcome. They are subject to revision at any time and updates can be found at http://www.asra.com
a Monitoring of anti-Xa level is not predictive of the risk of bleeding and is therefore NOT recommended.
b The presence of blood during needle and catheter placement does not necessitate postponing surgery, however LMWH therapy in this setting should be delayed for 24 h.