REPAIR OF DIGITAL NERVE INJURIES IN ADULTS.

Abstract

Evaluations of 32 adults with 50 complete digital nerve injuries were made more than 1 year after surgery. Twenty patients were men and 12 were women. The mean age of the patients at operation was 30 years. The mean follow-up time was 2 years. Patients were excluded if they had a skin graft, had a second surgery after digital nerve repair or graft, were diagnosed with diabetes, had additional proximal nerve injuries, had postoperative infections, had a complete digital amputation or had a dorsal digital nerve injury. According to the initial injury mechanism, patients were classified into three grades : grade I was defined as a sharp, clean-cut injury, grade II was mild crush and grade III was a severe crush injury. Overall, there were 30 primary digital nerve repairs, 12 secondary repairs and 8 secondary nerve grafts. Moving and static two-point discrimination was determined on both lateral aspects of the injured and contralateral uninjured digits. Digits with primary repairs in mild or severe crush injuries had significantly worse two-point discrimination compared with digits that had a primary repair of a simple laceration. Futhermore, in mild crush injuries, digits with secondary nerve grafting had significantly better results than those with primary repair. Patients under 30 years age had better results than those over 30 years. These results support the hypothesis that better recovery is obtained if tension is avoided at the nerve repair site in mild crush injuries.