红、白肌纤维为肌桥缝接狗神经缺损的实验形态学研究

分别用红、白肌纤维为肌桥,桥接狗股神经和正中神经缺损3cm。术后10个月切取桥接神经,并将它分成神经近段(正常神经部位)、肌桥段、神经远段(再生神经部位)和远、近端缝合段5个部分。常规制成光、电镜标本,最后镜下观察和LUZEX-F图像分析仪测定神经远、近段内有髓神经纤维密度和数量等。结果显示,红肌纤维为主的肌桥明显较白肌纤维的神经再生效果好(P<0.05)。特别是缝匠肌尾侧部为肌桥(红肌纤维为主)更明显较其颅侧部(白肌纤维为主)的神经纤维再生数量多(P<0.05)。由此可知缝匠肌尾侧部是一个最适宜神经再生的肌肉。

Experimental Morphological Research on Muscular Bridge of Red or White Muscle Fibers Suturing Defective Nerves in Dogs

Muscular bridges of red or white muscle fibers were used to suture respectively dogs' femoral nerve and median nerve 3 cm defects. The bridged part was incised ten months postoperative, which was divided into five segments: proximal segments (normal part), bridged, distal segment (regenerative part ), proximal and distal sutured segments. They were respectively made into optical preparations and electrical ones routinely, then observed and tested density and quantity of myelinated nerve fiber through microscope and LUZEX-F Image Analysis Machine. The results show that the muscular bridge regeneration of red muscle fiber is much more effective than that of white muscle fiber ( P <0. 05), especially the regenerative quantity of nerve fiber bridged with caudal part of sartorius muscle (priority of fiber of red muscle) is much more than that with cranial part (priority of fiber of white muscle) ( P <0. 05). From above, caudal part of sartorius muscle is a suitable bridge to premise of nerve regeneration.