146 CUNEAN TENOTOMY. 



pedis longus muscle extends inferiorly to near the point of 

 juncture of the two tendons ; the sheath of the lateral ex- 

 tensor ends below 3 to 4 cm. above the point of union. In 

 the middle of this space without a sheath, which is 3 to 4 

 cm. long, and below the, annular ligament of the hock the 

 operation is carried out. After the skin has been shaved 

 and disinfected, confine in the stocks or operate upon the 

 standing horse, with the aid of locsl anaesthesia, a twitch 

 being applied to the nose and the opposite hind foot held up 

 with the side-line. The tendon of the lateral extensor is 

 easily felt under the skin as a hai|d cord about .7 to i 

 cm. in diameter. Stretch the skin and with the back of 

 the hand toward the hock grasp the tendon with the thumb 

 and index finger of one- hand, insert the tenotome with the 

 cutting edge toward the foot perpendicularly upon the tendon 

 through the skin, subcutem and aponeurosis derived from the 

 crural f asci a ; push it from before backward under the tendon , 

 turn the cutting edge against it, and with the hock extended 

 sever the tendon as well as the fascia through to the skin. 

 In accomplishing the section of the tendon the knife is to be 

 u.sed as a lever of the first class with the anterior border of the 

 metatarsus acting as a fulcrum. If the tendon has been 

 completely severed its retracted ends may be felt under the 

 skin I to 2 cm. above and below the wound. After the op- 

 eration an antiseptic bandage is applied, resting upon the 

 fetlock. The bandage should remain eight days and the 

 cutaneous wound heal by first intention. Care should be 

 taken to not wound the tendon of the extenson pedis longus 

 muscle. 



36. CUNEAN TENOTOMY. 

 Pl,ATE XXIV. 



Objects. The relief of spavin lameness. 

 Instruments. Razor, scissors, straight scalpel, Peters' 

 spavin knife. 



Technic. Most horses can be operated on standing, with 



