JOURNAL ARTICLE
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Long-term results of replantation for complete ring avulsion amputations.

Ring avulsion injuries have long presented complex management problems. Despite microsurgical advances, it is difficult to achieve good functional results in complete degloving injuries or amputations, and their management remains somewhat controversial. Ten patients with class IV injuries according to Kay's classification were treated from 1986 to 2000. In this study the authors subdivided class IV injuries into those with amputation distal to the insertion of the flexor digitorum superficialis tendon (class IVd, 5 cases); those with amputation proximal to the insertion of the flexor digitorum superficialis tendon (class IVp, 3 cases); and complete degloving injuries leaving the tendons intact (class IVi, 2 cases). Replantation was done in class IVi and class IVd injuries, and 6 cases were revascularized successfully. In all these patients range of motion was complete at the metacarpal and proximal interphalangeal joints, but reestablishing sensibility was more difficult. Patients with class IVp injuries were treated by surgical amputation of the digit. Modifications of Kay's classification system based on anatomic injury is more predictive of functional outcome for completely amputated ring avulsion injuries. The authors conclude that complete ring avulsion amputations are salvageable, with acceptable functional results in select patients.

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