A Novel Classification of the Modified Cross-Finger Flap for the Repair of Fingertip Defect

Background This study aimed to establish a novel classification system for cross-finger flaps (Jun-Yang Classification) to systematically guide the reconstruction of open traumatic finger soft tissue defects. Methods From January 2019 to January 2022, 30 adult patients with open traumatic finger soft tissue defects were enrolled in this study. By systematically analyzing clinical parameters, including defect location, donor-recipient anatomical relationships, flap vascular patterns, and postoperative functional recovery, a new classification system based on anatomical characteristics was developed. Results Complete postoperative wound coverage was achieved in all patients, with satisfactory functional recovery and high aesthetic satisfaction. The Visual Analog Scale (VAS) score averaged 8.73 ± 0.76, and the Michigan Hand Outcomes Questionnaire (MHQ) score averaged 64.26 ± 5.25. The Jun-Yang Classification categorizes cross-finger flaps into four standardized subtypes based on two critical anatomical determinants: donor finger laterality (ulnar/radial), and primary vascular supply (ulnar/radial dorsal digital artery). Conclusion The Jun-Yang Classification system establishes an anatomically standardized categorization of cross-finger flaps, provides quantifiable guidance for precise surgical planning in open finger injuries, and significantly improves both functional and aesthetic outcomes of reconstructed digits.