Towards evidence based emergency medicine: best BETs from the Manchester Royal Infirmary. Antithrombotic treatment of below knee deep venous thrombosis.

A short cut review was carried out to establish whether oral anticoagulation is necessary to prevent pulmonary embolisation in patients with below knee deep venous thrombosis. A total of 425 papers were found using the reported search, of which 11 presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these best papers are tabulated. A clinical bottom line is stated.