Abstract
Frostbite is a common yet challenging injury to both diagnose and treat. McCauley's frostbite treatment protocol consists of 12 treatments that might well represent the standard of care. However, its effectiveness in preventing operative intervention has yet to be examined. Our objectives were to characterize frostbite injuries in Eastern Ontario, identify risk factors for deep injuries, and assess the protocol's efficacy in preventing operative outcomes. This cohort study examined patients with frostbite over ten years at a tertiary care hospital. Demographics and predisposing factors were recorded. Frostbite severity was categorized into superficial or deep. Treatments were recorded, including adherence to protocol and operative outcome. Of the 265 frostbite patients identified, deep frostbite accounted for 56 (21.1%, 95% CI: 16.2-26.1%), of whom 20 (35.7%) had an operative outcome. Amputation occurred in 16 (28.6%) of deep injuries and debridement in 5 (8.9%). Risk factors for deep frostbite were older age (p =0.002), smoking (p <0.001), male sex (p =0.056) and alcohol abuse (p =0.056). None of the patients with deep frostbite had all 12 treatments performed. Adherence to protocol ranged from 0.0% to 48.2% per treatment. The rate of operative intervention was 7.7% in patients with deep frostbite who did not have any McCauley's frostbite treatments and ranged from 0.0% to 100.0% per treatment in those who did receive treatments. The frostbite protocol was not regularly followed and therefore its efficacy in preventing operative intervention could not be determined. Further, none of the individual treatments in the protocol were associated with preventing operative intervention. We recommend that future research focus on identifying effective individual treatments.
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