Enhanced recovery for acute open lower limb fracture 'fix and flap'.

INTRODUCTION: Enhanced recovery (ER) aims to achieve earlier recovery, reduced hospital length of stay (LoS) whilst improving outcomes. Our ER protocol for acute lower-limb open fracture (ALLOFs) includes dangling at day 3 and mobilising fully weight-bearing from day 5. Our aims were to evaluate the outcomes of ALLOFs using our ER protocol for limb salvage, LoS following 'fix & flap', return to theatre, rate of successful flap salvage, flap failure and deep infection rates. METHODS: An observational study of a prospectively maintained lower limb flap database from September 2020 to January 2023 was undertaken. Search criteria encompassed patients with a Gustilo IIIB/C injury and a free flap reconstruction. Exclusions were for local/perforator flaps, soft tissue injury only, fracture related/prosthetic joint infections, or chronic osteomyelitis cases. RESULTS: 161 patients were available for analysis, 126 male (78 %) and 35 female (22 %) with a median age of 40 years (12-79, interquartile range 30.0). 81 % of cases were high-energy injuries. For all patients, the median time to definitive fixation and soft tissue coverage from injury was 4 days (0-30, interquartile range 2). 18 cases (11.2 %) required return to theatre for flap exploration; 11 cases were successfully salvaged (61 %). Nine free flaps failed (5.4 %). The median total LoS from admission was 10 days (6 to 46, interquartile range 5), with a median LoS following definitive fixation and soft tissue coverage of 7 days (4 to 20, interquartile range 3). The median follow-up period was 18 months (12 to 38.2, interquartile range 9), with a deep infection rate of 6.5 %. CONCLUSION: In isolated ALLOFs, our ER protocol is safe and effective in shortening the LoS. Our outcomes sit comfortably within acceptable ranges of contemporary literature for return to theatre, flap salvage/failure and deep infection. Our ER protocol actively involves our allied health professional colleagues early to facilitate discharge.