NEUROTOMY OF THE ULNAR NERVE. 167 



40. NEUROTOMY OF THE UlyNAR NERVE 

 Plates XXVIII and xxix. 



Objects. An adjunct operation to the preceding by 

 which the enervation of the carpus and foot is completed. 



Instruments. Same as in the preceding. 



Technic. Above and behind the carpus there may be 

 felt a groove between its external and middle flexors, EP 

 and OF, Plate XXIX. At this point 10 cm. above the 

 ,' pisiform bone the skin is shaved and disinfected and an in- 

 cision 6 cm. long made through the skin and antibrachial 

 fascia. This incision extends just outside the median line 

 of the posterior surface of the radius in such a way that the 

 superior angle of the wound is about i cm. farther out- 

 ward than the lower. Beneath the fascia between the 

 aforesaid muscles is seen the ulnar nerve, Plate XXVIII, v 

 n, Plate XXIX, NU, on the median or inner side of it 

 the collateral ulnar vein, Plate XXVIII v, and between the 

 two and somewhat deeper the collateral ulnar artery, a. 

 The nerve, about 3 mm. in diameter is picked up with the 

 aneurism needle, severed at the upper and lower angles of 

 the wound, the lips of the wound united by a continuous 

 suture and a bandage applied. Healing by first intention. 



