Abstract
Introduction
Ottawa ankle rules originally described in 1992 have been shown to improve the pick-up rates of ankle fractures and avoid the need for unnecessary X-rays, thus minimising cost and radiation to the patient.
We decided to carry out an audit at our hospital to look at the pick-up rates of ankle fractures and ways to minimise x-rays for the patient both in A&E and in the orthopaedic department.
Methods
Ankle x-rays of 1088 trauma patients over a 7 month period from Dec 2009 to June 2010 (inclusive) were reviewed. Patients with ankle fractures were classified according to Weber type, and whether they were treated surgically or non-operatively. Non-operatively treated ankle fractures then formed the main sub-group of our study, looking at the number of follow-up X-rays and the amount of subsequent displacement. The amount of displacement was classified into non-displaced (0 mm), minimally displaced (<2mm) and displaced (>2 mm).
Results
171 patients (out of 1088) were found to have fractured their ankle giving a pick up rate of 16%. (cf a pickup rate of 26% described in literature with implementation of Ottawa rules). The pick up rate fluctuated each month from 31% in December to a meagre 6% fractures in June and this could be due to summertime sports injuries causing less fractures and more sprains. We noted a third more x-rays were ordered in Spring than Winter. There were no changes in junior staff in either the A&E or the orthopaedic department to account for the monthly variations.
Conservatively managed fractures were followed up in the fracture clinic (n = 95, 56%) 16% (n = 11) of the conservatively managed patients were classified as Weber A fractures 84% (n=58) as Weber B fractures. No Weber C fractures were conservatively managed. Of the eleven Weber A fractures only one was minimally displaced. Conservatively managed Weber A fractures received an average of 1.36 x-rays on follow up in the Orthopaedic department. Of the Weber B fractures 42 were non-displaced whilst 16 were minimally displaced, and these received an average of 3.23 x-rays on follow up. None of these progressed to displacement > 2mm.
Conclusion
Based on our audit, we have introduced a policy to limit the number of follow-up of X-rays for minimally displaced and undisplaced Weber A & B fractures to one. We have also re-emphasized the importance of Ottawa rule implementation in our A&E department
