{'fraction_non_alphanumeric': 0.035731076633756464, 'fraction_numerical': 0.022096850023507288, 'mean_word_length': 4.83013698630137, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The Superficial Inferior Epigastric Artery Based Abdominal Flap for Reconstruction of Extensive Defects of the Hand and Forearm: A Modified Design With Primary Closure of the Donor Site.

INTRODUCTION
The reconstruction of the hand and forearm targets the restoration of their function and aesthetic appearance. Inferiorly based abdominal flaps are reliable and versatile flaps that can cover large defects of the forearm and hand. Here we present a modified abdominal flap design based exclusively on the superficial inferior epigastric artery (SIEA) to reconstruct the hand and forearm's extensive defects. The donor site is closed primarily.


METHODS
This is a retrospective study of the patients who underwent reconstruction of hand and forearm defects with SIEA flap from 2006 to 2018. The flap was designed on the ipsilateral hemiabdomen with a narrow pedicle based on the SIEA. We describe the anatomical basis and the outcomes of SIEA flap for reconstruction of the hand and forearm's extensive defects.


RESULTS
Forty-eight soft tissue defects of the hand and forearm were reconstructed with the SIEA-based abdominal flap. Twenty-nine (60.41%) dorsal defects, 4 (8.33%) volar defects, 4 (8.33%) circumferential defects, 6 (12.5%) hand amputation stump, and 5 (10.41%) finger and thumb defects were covered using the SIEA flap. Forty-seven (97.91%) flaps had complete survival, whereas 1 (2.08%) flap had distal necrosis at the time of division. One (2.08%) flap had marginal necrosis, and 1 (2.08%) flap had distal necrosis after the division. The donor site was closed primarily in all patients. One (2.08%) patient had wound dehiscence at the abdominal donor site. All flaps gave excellent coverage with a satisfactory contour.


CONCLUSION
Abdominal flap based on SIEA is a safe, reliable, and versatile flap for the reconstruction of extensive soft-tissue defects of the hand and forearm. An ability to provide a large amount of skin and soft tissue and the abdominal donor site's primary closure make it a favorable option for upper limb reconstruction in regions with limited resources and technical expertise.