Forty-two complete thumb replantations performed between 1980 and 1984 were reviewed. The mean follow-up time was 14 months. Replantation was attempted for all thumb amputations regardless of mechanism or severity of injury. Sixteen (38%) failed intraoperatively or postoperatively. Thumbs with narrow zones of injury showed a significantly higher survival rate than those with wide zones of injury. Eighty percent of those with poor arterial flow intraoperatively ultimately failed, despite pharmacologic treatment and multiple vein-graft anastomoses. Two thumbs with no vein repairs ultimately survived. Reexploration for loss of perfusion succeeded in 60% of cases. Total metacarpophalangeal and proximal interphalangeal active motion postoperatively averaged 68°. Median static two-point discrimination returned to 11 mm. Avulsed thumbs survived in 46% of cases. Replantation should be attempted in all cases of thumb amputation, as success cannot be predicted by mechanism or severity of injury. Thumbs with poor intraoperative flow (20%) or no venous return (50%) can survive and should not be primarily amputated. Vein grafting is not mandatory if shortening allows anastomoses to be tension free. Prompt reexploration of acute vascular occlusions is worthwhile.
ASJC Scopus subject areas
- Orthopedics and Sports Medicine