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Updated: Feb 16, 2026

An Experimental Human DIEP Flap Model to Investigate Preservation Strategies for Vascularized Composite Allografts and Free Flaps
Published on: December 5, 2025
Keystone-Designed Perforator Island Flaps for the Coverage of Traumatic Pretibial Defects in Patients With
Chi Sun Yoon1, Sang Il Kim2, Hoon Kim2
11 Department of Plastic and Reconstructive surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
Abstract:
Reconstruction of pretibial skin and soft-tissue defects remains a challenge because this area has less underlying tissues and limited tissue mobility. Here, we present a retrospective review of our experience with pretibial reconstruction using the keystone-designed perforator island flap (KDPIF) in patients with comorbidities. All defects resulted from nononcological causes. We describe the expanding versatility of KDPIF reconstruction for pretibial defects and suggest a simple algorithmic approach. The medical records of 9 patients who underwent reconstruction with a KDPIF to cover a pretibial defect between May 2016 and June 2017 were reviewed. Clinical and operative data were collected. All 9 KDPIFs fully survived. The defect size varied from 3 × 2 cm2 to 8 × 6 cm2. The flap size varied from 5 × 3 to 20 × 10 cm2. The mean operative time was 90.4 minutes (range = 37-127 minutes). No postoperative complications occurred. The cosmetic results were favorable, and all patients were satisfied with the final outcomes. Thus, the KDPIF is a good reconstruction modality with few complications and provides an alternative to free flaps for pretibial defect reconstruction in patients with comorbidities.

