Osteocutaneous Fibular Flap for Reconstruction of Composite Metacarpal Defects Due to Gunshot Wounds.

Background: Gunshot wounds of the hand are challenging, as these injuries include bones, tendons neurovascular structures, and soft tissue. The osteocutaneous fibula flap has shown to be an excellent option for treating the composite defects, including bone and soft tissue. In this study, reconstructions of gunshot injuries of the metacarpal bones with a fibular flap are presented.

Methods: Six patients with gunshot injuries to the hand were treated with free fibula flap. All patients had composite defects reconstructed with osteocutaneous fibula flap. Because of the size mismatch between fibula and metacarpal bone, a longitudinally split fibula was used in 2 patients. In 1 patient, the flap was used in a double-barrel fashion to reconstruct 2 metacarpal bone losses. Tendon repairs were performed either primarily or with tendon graft. All patients received hand rehabilitation. Hand function of the patients was evaluated by grip and pinch strength tests and Jebsen hand function test.

Results: All flaps survived with no major postoperative complications. The mean follow-up period was 18 months. Web releasing and an arthrodesis procedure was performed in 1 patient, and tenolysis was performed in 2 others. All flaps adapted well to the recipient area. With respect to routine daily activities, overall hand function measured by grip and pinch strength tests and Jebsen hand function test was considered satisfactory in all patients.

Conclusions: The fibular flap is a good alternative for reconstruction of the injured hand with composite defects, including metacarpal bone and soft tissue. It can be used longitudinally or transversely. Osteotomies can be performed to obtain split fibular flap or double-barrel fibular flap according to the bone defect.