Boyd Amputation Using the Tension Band Technique.

backgroundAmputation at the level of the hindfoot results in an equinus deformity from an imbalance of muscle-tendons acting across the ankle. Boyd's reconstruction for hindfoot amputations is a well-known technique that retains the calcaneus and fuses it with the distal tibia at the ankle mortise. It provides an excellent weight-bearing stump and in most cases does not require an artificial limb but its use has been restricted because of the difficulty in obtaining high union rates in the tibiocalcaneal fusion. MATERIALS AND

methodsFive patients (four unilateral and one bilateral) underwent leg amputations from January 2012 to November 2013 using the Boyd technique for reconstructing the stump and were stabilized with a tension band. The study sample consisted of adult patients who had traumatic reasons for the amputation. Patients under 18 years old with a hindfoot that was inadequate for Boyd reconstruction (i.e., insufficient soft tissue coverage or no posterior tibial artery pulse) were excluded. One (case #2) had systemic comorbidities (e.g., hypertension, diabetes, chronic vascular insufficiency) as well as being a smoker. Three men and two women (mean age 39 years; range 21-61 years) were included. Three patients underwent amputation on the right side, one on the left side, and one bilaterally (case #5). All patients presented with Gustillo and Anderson IIIC open fractures. The mean time from lesion to amputation was 2.25 weeks (range 1-4 weeks). The mean follow-up duration was 16 (range 12-24) months. The post-surgery examination included a clinical examination and radiography. A 6 minute walk test (6 MWT) was performed on week 32 after the amputation. This study was carried out with the approval of our institution's ethics committee. All patients provided a written informed consent form in accordance with the World Medical Association and the Declaration of Helsinki.

resultsAll six stumps fused successfully. The 6 MWT results were comparable to those found in the literature for other lower limb amputees.

conclusionThe tension band technique used as part of the Boyd amputation to achieve tibiocalcaneal fusion was effective in all five trauma patients. Sound fusion was achieved in all cases with the 6 MWT scores comparable to that in the literature. This technique should be considered an osteosynthesis option for the Boyd procedure. LEVEL OF EVIDENCE: Level IV, retrospective study. HOW TO CITE THIS ARTICLE: Mongon MLD, Sposito AL, Nunes GMN,