Abstract
Objective To explore the clinical effect of free medial sural artery perforator (MSAP) flap for repair of severe thumb web scar contracture. Methods From October 2012 to March 2015, 14 cases of severe thumb web scar contracture were repaired with free MSAP flap after scar excision. The flap areas ranged from 5 cm×4 cm to 9 cm×6 cm. The clinical outcomes were evaluated by the appearance of transplanted flaps, sensory recovery, opening angle and width of thumb web and donor site recovery at postoperative follow-up. Results All 14 flaps survived uneventfully. The thumb webs were well-stacked with satisfactory shapes. There was no secondary contracture. Primary healing was achieved at donor sites. Postoperative follow-up ranged from 12 to 18 months, with an average of 14 months. Postoperative angle of repaired thumb webs was enlarged to (80±6)° from preoperative angle of (15±5)°. And the width was enlarged to (45.0±5.6) mm from (20.0±3.5) mm. Thumb functions of abduction, adduction and opposition were all improved obviously. All flaps restored protective sensation. Six cases with anastomosis of medial sural cutaneous nerve recovered to S3. No functional damage was observed at donor sites. Conclusion MSAP flap is an effective way to repair severe thumb web contracture because of its constant perforator, satisfactory shape of repaired thumb webs and minor damages to donor sites. Key words: Surgical flaps; Transplantation; Medial sural artery perforator; Thumb web contracture
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