断指再植指骨可吸收髓内钉固定的临床应用

目的分析断指再植应用可吸收髓内钉固定指骨的疗效。方法2001年9月～2003年10月，对28例工业性断指，男21例21指，女7例7指；年龄18～35岁。指别：食指11例，中指8例，环指6例，小指3例，其中近节指骨15例，中节指骨11例，末节指骨2例。于伤后1～6h进行急诊再植，并应用自行研制的可吸收消旋聚乳酸(poly-DLlactic acid，PDLLA)混合壳聚糖髓内钉固定指骨。手术先扩大指骨髓腔，然后安插合适直径和长度的髓内钉进行固定，术后用树脂绷带固定3～4周。结果28例断指再植均成活，术后随访3～10个月，平均4个月。有1例于术后3周出现排异反应，余27例在随访期内骨折均达骨性愈合。按中华医学会手外科学会断指再植功能评定试用标准：优18指，良9指，差1指，总优良率96．4％。结论可吸收PDLLA混合壳聚糖髓内钉是断指再植固定指骨的一种理想方法。

CLINICAL STUDY OF PHALANGE FRACTURES TREATED BY ABSORBABLE INTRAMEDULLARY NAIL IN REPLANTATION OF SEVERED FINGER

Objective To study the effect of internal fixation with absorbable intramedullary nail on the treatment of phalange fractures in replantation of severed finger. Methods From September 2001 to October 2003, 28 cases with industrial severed finger (21 males and 7 females, with the age of 18 35 years) were replanted within 1 6 hours. The severed locations were index fingers in 11 cases, middle fingers in 8 cases, ring fingers in 6 cases, little fingers in 3 cases. All cases of phalange fractures were fixed by absorbable intramedullary nails of poly DL lactic acid(PDLLA) that combined with chitosan. Out of the 28 cases, 15 cases were with proximal phalange, 11 cases were with middle phalange, 2 cases were with distal phalange. The bone marrow cavity of the phalanges were dilated, then the intramedullary nail was inserted with suitable diameter and length to fix the fracture. Postoperatively resin bandage was applied for 3 4 weeks.Results All the 28 patients survived the performance and postoperative follow up ranged from 3 to 10 months (4 months in average). Rejection was observed in one case 3 weeks after operation, bone unions were obtained in other cases. According to the Chinese Medical Association's evaluation standard for replantation of amputated finger, 18 fingers resulted in excellence, 9 fingers in good function and 1 with unsatisfactory function. The excellent and good rate was 96.4%. Conclusion Internal fixation with absorbable intramedullary nail of PDLLA combined with chitosan proves to be effective in the replantation of severed finger.