Canopy Flap: A Specially Shaped Flap for the Repair of Complex Hand Defects.

Area of Science:

• Plastic Surgery
• Microsurgery
• Hand Reconstruction

Background:

• Traditional flap transplantation for complex hand defects presents challenges including inadequate blood supply and scar contracture.
• The "canopy flap" technique with 3D shaping is explored as a potential solution.

Purpose of the Study:

• To evaluate the clinical efficacy of the canopy flap with 3D shaping in repairing complex hand defects.
• To assess the outcomes of this technique regarding flap survival, complication rates, and functional recovery.

Main Methods:

• Retrospective analysis of 13 patients with complex hand defects treated with canopy flaps.
• Technique involved preoperative contour tracing, single perforator vessel design, tourniquet harvesting, tension-dispersed transfer, and microvascular anastomosis.
• Postoperative assessment included sensory grading (MRC scale) and hand function evaluation.

Main Results:

• High flap survival rate (12/13 completely survived, 1 salvaged).
• Favorable flap appearance, reduced scar contracture, and good donor site healing.
• Significant sensory recovery (S4, S3, S2) and excellent/good hand function in approximately 70% of patients.

Conclusions:

• The canopy flap demonstrates a high survival rate and excellent 3D conformability for complex hand defect repair.
• This technique effectively reduces complications and achieves favorable sensory and functional outcomes.
• Canopy flap reconstruction is a valuable option for complex hand defects, offering improved patient results.