Comparison of single-stage reverse sural artery flap versus two-staged interpolated flap in distal lower limb injuries

Background and Objective: Plastic surgeons face challenging conditions when dealing with soft tissue injuries or defects involving the lower part of the leg and the proximal part of the foot. The objective of the current study is to compare single-staged reverse sural artery flaps with two-staged interpolated flaps in distal lower limb injuries. Methods: It was a prospective study carried out at the Department of Plastic Surgery, Allama Iqbal Memorial Teaching Hospital, Sialkot, Pakistan, over 5 years from 2015 to 2020. Sixty-eight (n = 68) patients with distal lower limb soft-tissue defects were enrolled and randomly allotted a two-stage interpolated flap design (group A) or single-stage reverse sural artery flap design (group B). The measured outcomes included the frequency of flap-tip necrosis, epidermolysis, partial or total flap loss, and additional procedures needed for managing these complications. Results: Out of all the patients, 72% were of male gender and 28% were females with a mean age of 38.38 ± 10.76 years. In group A, there were 6% of the cases where tip necrosis was the only impediment as compared to 17% in group B. In patients of group A, epidermolysis was seen in 12% as compared to 35% in group B whereas only 6% of patients in group A required secondary procedures for flap tip necrosis as compared to group B (47%). Paired t-test was used to calculate the statistical significance of the outcome between the two groups (p-value of 0.0491). Conclusion: The two-staged interpolated flap procedure results in fewer complications as compared to a single-staged reverse sural artery flap procedure. However, the shorter hospital stay in single-staged flap design is satisfying for the patients who did not report any complications with this procedure.