Abstract
Purpose
Conservative treatment of minimally displaced distal radius fractures (DFR) remains controversial. Circumferential casting (CC) in the acute setting is believed to supply superior support compared to splinting, but is generally cautioned due to the limited capacity of a cast to accommodate ongoing limb swelling possibly leading to complications. However, there is no conclusive data on which to base these beliefs. Moreover, the appropriate management of cast complications while minimizing risk to fracture integrity remains unclear.
This retrospective study of distal radius fractures treated conservatively with circumferential cast in the acute setting aims to: A. Determine demographic, fracture dependant or management risk factors for CC complications. B. Determine the natural history for both patients with CC and those with CC necessitating cast modification.
Method
Hospital records and radiographic data of 316 patients with DRFs treated with CC at a tertiary-care university hospital between the years 2006 to 2009 were reviewed. Our primary outcome was to access risk factors for cast complications including swelling, pressure sores, neuropathies and loss of cast immobilization. Our secondary outcome accessed reduction stability in patients undergoing cast re-manipulation.
Results
31% of patients experienced cast related complications within the first two weeks of treatment. 22% of patients had their cast manipulated (replaced, split, trimmed or windowed). Increasing patient age or polytrauma were both associated with an increased risk of developing cast complications. Polytrauma was also associated with a poor overall rate of fracture reduction following non-operative management. Patient gender, physician specialty placing the cast as well as fracture type (AO classification) did not influence risk. Overall, patients with acute cast complications had no increased risk of losing reduction compared to patients with normal management. However, patients who complained of pressure in cast had a higher risk of loss reduction if their cast was split as opposed to being replaced.
Conclusion
Circumferential casting in the acute setting of minimally displaced DRF reduces the workload of an orthopedic department. No previous study has shown improved fracture outcome compared to CC using other immobilization methods. This study has identified that elderly patients and polytrauma patients are at greater risk of returning to clinic for cast complications. Furthermore, replacing a cast as opposed to splitting it when accommodating painful swelling may aid in maintaining reduction integrity.
