[Application strategy and clinical effects of paraumbilical perforator flap with inferior epigastric vessels in repairing destructive wounds].

Objective: To explore the application strategy and clinical effects of paraumbilical perforator flap with inferior epigastric vessels in repairing various destructive wounds. Methods: The retrospective observational study method was applied. From January 2015 to December 2020, 28 patients (21 males and 7 females, aged 25 to 66 years) with destructive wounds in various body parts were admitted to Beijing Jishuitan Hospital. The wound areas of patients ranged from 17 cm×8 cm to 35 cm×22 cm after debridement. Pedicled or free paraumbilical perforator flaps with inferior epigastric vessels were used to repair the wounds respectively. The areas of flaps were from 18 cm×10 cm to 37 cm×24 cm, and the lengths of vascular pedicles were 13.0-17.0 (15.1±2.3) cm. For type Ⅲ high-voltage electric burn wounds of wrist, two methods were used to reconstruct the blood flow of hand, one is to bridge the radial artery with saphenous vein grafting and the other one is to design blood flow-through flap. The strength of abdominal wall in the donor site was strengthened by polypropylene patch, and then the wounds were directly sutured. If the wounds could not be sutured directly, then allogenic acellular dermal matrix (ADM) was applied to strengthen the abdominal wall first, and then autologous medium-thickness skin graft was taken from the thigh to cover the wounds. The flap transplantation, hand blood flow reconstruction, the repair of donor site, the flap survival, the wound and donor site healing after operation, the appearance of flaps, and the wound and donor site recovery during follow-up were observed. Results: Among the patients in this group, 13 patients were treated with pedicled flap grafting, while 15 patients were treated with free flap grafting. The hand blood flow of 7 patients with type Ⅲ high-voltage electric burn wounds of wrist was reconstructed by bridging radial artery with saphenous vein grafting. The hand blood flow of 3 patients with type Ⅲ high-voltage electric burn wounds of wrist was reconstructed with blood flow-through flap. In 16 patients, the strength of abdominal wall was strengthened using patch in the donor site,and then the donor sites were sutured directly. In 12 patients, the strength of abdominal wall was strengthened using allogenic ADM, and then the donor sites were covered by skin grafting. All the transplanted flaps survived completely. The wounds of 24 patients were healed, while the wounds of 3 patients with type Ⅲ high-voltage electric burn wounds of wrist and 1 patient with chronic radiation ulcer of ilium failed to heal because of there were still some necrotic tissue and purulent secretion under the flaps. The wounds were healed eventually after debridement and dressing changes. During the follow-up of 6 months to 3 years, the flap survived well with good appearance in all patients, and there was no recurrence, or no abdominal wall hernia occurred in the donor site. Conclusions: Paraumbilical perforator flap with inferior epigastric vessels has flexible design, long vascular pedicle, large area for cut. It can be pedicled or freely transplanted, which is a good choice for repairing destructive wounds in various areas.