Flexor digitorum profundus tendonavulsions

Abstract

Avulsion of the flexor digitorum profundus (FDP) tendon is a relatively common injury that most frequently involves the ring finger. Misdiagnosis is common but can be avoided with a carefully performed patient interview and examination. Profundus avulsions have been classified into three main types based on the level of tendon retraction, the remaining nutritional supply, the length of time between injury and treatment, and the presence or absence of an associated avulsion fracture. Treatment involves prompt reattachment using a pullout suture technique or open reduction and internal fixation of an appropriate sized avulsion fracture. With careful attention to operative detail, meticulous handling of the tendon, and an early range of motion rehabilitation program, satisfactory outcomes can be expected.