Risk Factors for Secondary Revision After Finger Amputations

Digit amputations are relatively simple and are often performed in the setting of trauma or infection. However, it is not uncommon for digit amputations to undergo secondary revision due to complications or patient dissatisfaction. Identifying factors associated with secondary revision may alter treatment strategy. We hypothesize that the secondary revision rate is affected by digit, initial level of amputation, and comorbidities.

A retrospective chart review was conducted on patients undergoing digit amputations in operating rooms at our institution from 2011 to 2017. Secondary revision amputations were defined as a separate return to the operating room following initial surgical amputation, excluding emergency room amputations. Patient demographics, comorbidities, level of amputation, and complications were collected.

In all, 278 patients were included with a total of 386 digit amputations and mean follow-up of 2.6 months. Three hundred twenty-six primary digit amputations were performed in 236 patients (group A). Sixty digits were secondarily revised in 42 patients (group B). The secondary revision rate was 17.8% for patients and 15.5% for digits. Patients with heart disease and diabetes mellitus were associated with secondary revision, with wound complications being the leading indication overall (73.8%). Medicare covered 52.4% of patients in group B versus 30.1% in group A (P = .005).

Risk factors for secondary revision include Medicare insurance, comorbidities, previous digit amputations, and initial amputation of either the index finger or the distal phalanx. These data may serve as a prediction model to aid surgical decision-making by identifying patients at risk of secondary revision amputation.