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General Orthopaedics

A NATIONAL AUDIT OF VENOUS THROMBOEMBOLISM PROPHYLAXIS FOR OUTPATIENTS IN LOWER LIMB CASTS

British Orthopaedic Trainee Association (BOTA)



Abstract

The National Institute of Clinical Excellence (NICE) published guidance for reducing the risk of venous thromboembolism (VTE) in January 2010. This guidance has had a significant impact on the management of all inpatients. It is now mandatory to risk assess every inpatient and commence appropriate treatment if indicated. The guidelines specifically exclude outpatients although NICE recognises' that lower limb cast immobilisation is a risk factor for VTE. The purpose of our study was to establish the current practice for the management of outpatients treated with lower limb casts in England.

The NHS Choices website lists 166 acute hospitals in England. A telephone audit was conducted in February 2011. A member of the on call orthopaedic team was asked: 1. Are you aware of the NICE guidelines for VTE prophylaxis? 2. In your department, outpatients treated with a lower limb cast, are they risk assessed for VTE? 3. If a patient undergoes Open Reduction Internal Fixation (ORIF) for an ankle fracture and is discharged wearing a cast, are they given VTE prophylaxis? 4. If yes - for how long are they treated?

Responses were obtained from 150 eligible hospitals (1 FY1, 28 FY2, 44 ST1-ST2, 76 ST3+, 1 Consultant). 62% of responders stated that they were aware of the NICE guidance. 40% of responders stated that outpatients were routinely risk assessed for VTE. 32% of responders stated that ankle fractures treated with an ORIF and discharged wearing a cast would receive VTE prophylaxis. The duration of treatment varied from 5 days, to 6 weeks, to removal of cast.

The management of patients treated with a lower limb cast is variable and inconsistent throughout England. Although there are no national guidelines for this patient group, the routine risk assessment of outpatients was higher than anticipated by the authors. We recommend that if VTE prophylaxis is commenced as an inpatient, then it should be continued until the cast is removed.