Correction of ankle and hind foot deformity in Charcot neuroarthropathy using a retrograde hind foot nail-The Kings' Experience.

BACKGROUND: Corrective fusion for the unstable deformed hind foot and mid foot in Charcot Neuroarthropathy (CN) is quite challenging and is best done in tertiary centres under the supervision of multidisciplinary teams. METHODS: We present a follow up to our initial report with a series of 42 hind foot corrections in 40 patients from a tertiary level teaching hospital in the United Kingdom. The mean patient age was 59 (33-82). 17 patients had type1diabetes mellitus, 23 had type 2. 23 feet in 22 patients had chronic ulceration despite offloading. 17 patients were ASA 2 and 23 were ASA grade 3. All patients had hind foot nail fusion performed through a standard technique by the senior author and managed perioperatively by the multidisciplinary team. RESULTS: At a mean follow up of 42 months (12-99) we achieved 100% limb salvage initially and a 97% fusion rate. One patient with persisting non-union of ankle and subtalar joint with difficulty in bracing has been offered below-knee amputation. We achieved deformity correction in 100% and ulcer healing in 83%. 83% patients are able to mobilize and manage independent activities of daily living. There were 11 patients with one or more complications including metal work failure, infection and ulcer reactivation. There have been nine repeat procedures including one revision fixation and one vascular procedure. CONCLUSION: Single stage corrective fusion for hind foot deformity in CN is an effective procedure when delivered by a skilled multidisciplinary team.