Abstract
目的 测算尺神经分支的神经纤维数目和结缔组织面积等指标,计算各功能束组的纤维含量及比例,为临床选择性修复手内肌功能的手术设计和估计预后提供参考依据.方法新鲜尸体标本6具,分离尺神经及其分支,各分支取材,福尔马林固定,常规石蜡横断面切片厚7μm,Loyez髓鞘染色法染色,应用图像分析系统对组织切片定量分析.测算各分支神经断面纤维密度、神经纤维截面积和神经干截面积,计算神经纤维数目,神经纤维和结缔组织所占比例.结果定量分析:尺神经分支有髓纤维总数为13648条,其中尺神经深支(支配手内肌)(3601±647)条,占26%;第四指间隙皮支(2327±609)条,占17%;小指尺侧皮支(2236±464)条,占16%;尺神经深支(支配手内肌)(3601±647)条,占26%;腕背支(2565±382)条,占19%;尺动脉支(418±210)条,占3%;尺侧腕屈肌远支(660±376)条,占5%;指深屈肌支(930±411)条,占7%;尺侧腕屈肌近支(914±223)条,占7%.结论手内肌功能束组是尺神经中最主要的功能束组,采用束膜缝合法选择性修复,将减少所需移位神经纤维的数目。
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