Cross-leg free flaps and cross-leg vascular cable bridge flaps for lower limb salvage: experience before and after COVID-19

BACKGROUND: Previous reports have evidenced the disruptive effect of the COVID-19 in microsurgical and reconstructive departments. We report our experience with cross-leg free flaps and (CLFF) and cross-leg vascular cable bridge flaps (CLVCBF) for lower limb salvage, technical consideration to decrease morbidity, and some structural modifications to our protocols for standard of care adapted to the COVID-19. METHODS: We retrospectively included consecutive patients undergoing reconstruction with CLFFs and CLVCBFs for lower limb salvage from January 2003 to May 2022. We extracted data on baseline demographic characteristics, mechanism of trauma, and surgical outcomes. RESULTS: Twenty-four patients were included, 11 (45.8%) underwent reconstruction with CLFF while 13 had CLVCBFs (54.2%). Fifteen patients (62.5%) underwent lower limb reconstruction under general anesthesia while 9 (37.5%) had combined spinal-epidural anesthesia. During COVID-19 pandemic, six CLFF cases were performed under S-E (25%). The average time for pedicle transection of muscle CLFFs and muscle CLVCBFs was comparable between groups (60 days versus 62 days, p = 0.864). A significantly shorter average time was evidenced for pedicle division of fasciocutaneous flaps in the CLFF group when compared to CLVCBFs (45 days versus 59 days, p = 0.002). CONCLUSIONS: In selected patients, CLFFs and CLVCBFs offer an optimal alternative for lower limb salvage using recipient vessels out of the zone of injury from the contralateral limb. Modification in the surgical protocols can decrease improve resource allocation in the setting of severely ill patients during COVID-19. Level of evidence: Level III, Therapeutic.