Abstract：
BACKGROUND Congenital hypoplasia of the thumb type IV, also known as floating thumb, is a condition in which 2 small phalanges are attached to the hand with a thin skin bridge. Surgical management options for this condition vary from amputation to flap reconstruction. MATERIAL AND METHODS This retrospective study analyzed 11 infants with congenital hypoplasia of the thumb type IV who underwent surgical reconstruction using a modified vascularized polydactylous hallux flap. The study included 6 male and 5 female infants, aged 6 to 24 months. Functional evaluations and radiographic studies were conducted postoperatively. RESULTS All 11 patients underwent the complete surgical protocol. Successful vascular and nerve anastomoses were performed during the initial procedure, ensuring sufficient blood supply and neural connectivity to the transferred toes. The second operation showed promising outcomes, including improvements in thumb opposition, grasp strength, and overall function. Postoperative assessments demonstrated satisfactory radiographic alignment and no major complications during the follow-up period. CONCLUSIONS The modified vascularized polydactylous hallux flap reconstruction is a viable surgical option for managing congenital hypoplasia of the thumb type IV in infants. This technique effectively restores thumb opposition, grasp strength, and overall hand function, with satisfactory radiographic alignment and minimal complications. The study findings support the efficacy and safety of this surgical approach in addressing this rare congenital anomaly.
摘要：
背景技术先天性拇指发育不全IV型,也被称为浮动拇指，是一种情况，其中2个小指骨与薄皮肤桥连接到手上。这种情况的手术治疗选择从截肢到皮瓣重建各不相同。材料与方法这项回顾性研究分析了11例先天性IV型拇指发育不全的婴儿，这些婴儿使用改良的血管化多趾皮瓣进行了手术重建。该研究包括6名男性和5名女性婴儿，6至24个月。术后进行功能评估和影像学检查。结果11例患者均接受了完整的手术方案。在初始手术过程中进行了成功的血管和神经吻合，确保足够的血液供应和神经连接到转移的脚趾。第二次手术显示了有希望的结果，包括拇指对立的改进，把握力量,和整体功能。术后评估显示，在随访期间，放射学检查令人满意，并且没有重大并发症。结论改良的血管化多指拇指皮瓣重建是治疗婴儿IV型先天性拇指发育不全的可行手术选择。这种技术有效地恢复了拇指的反对，把握力量,和整体手部功能，具有令人满意的射线照相对准和最小的并发症。研究结果支持这种手术方法在解决这种罕见的先天性异常方面的有效性和安全性。
