464 



VETERINARY SURGICAL OPERATIONS 



simply placing a padding beneath the leg. If the leg is upper- 

 most the sole - will face downward into an almost inaccessible 

 position. If ropes are used the patient should be rolled into 

 the dorso-lateral position so that the soles will face in an up- 

 ward direction toward the operator. 



After clipping the hair from the lower part of the leg and 

 paring the horny sole and frog as thin as a wafer (which step 

 might precede the casting) the entire sensitive frog from a 

 point about one inch from the heel to its apex, is removed. 

 This excision is effected by first making three incisions, one 



Fig. 241 — Method of Dressing Nail-Prick Wound.. 



a, a, a, Sole Leather. 



b, b, Retaining Plates of Hoop Iron. 



across the frog one inch from the heel carried down to the 

 very depths (about two inches) and one on each side of the 

 frog from the transverse incision to the apex; and then grasp- 

 ing and drawing upon the triangular island thus isolated with 

 a strong tumor forceps, while it is dissected from the plantar 

 aponeurosis from before backward. Portions of the frog 

 which still remain attached to the plantar aponeurosis are 

 then carefully shaved off until the tendinous fibers become 

 visible and the outlines of the navicular bone can be traced 

 with the fingers. It might be well to remind the reader that 

 the sensitive frog (plantar cushion) is firmly fused with the 



