i86 RESECTION OF THE LATERAL CARTILAGE. 



50 per cent, alcohol. The fetlock and pastern are carefully 

 wrapped in a towel saturated with sublimate solution or 

 other disinfectant. The hoof should be similarly wrapped 

 except the operative area and every precaution taken against 

 the transfer of infecting material from neighboring parts 

 into the wound. The elevator or long bone chisel is 

 then inserted beneath the lowest part of the semi-circular 

 piece of horn which has been isolated, the horn is elevated 

 from the sensitive structures somewhat, grasped with the 

 heavy forceps, and carefully loosened from the sensitive parts 

 by drawing upward parallel to the laminae and then back- 

 ward from the coronary papillse and keraphyllous tissue. 

 After the coronary band has been smoothed with the scissors, 

 make two perpendicular incisions through the skin and 

 coronory band, one behind the anterior and the other in 

 front of the posterior border of the groove in the horn and 

 connect the two by means of a semi- circular incision in the 

 sensitive laminae. This U-shaped incision should be so 

 made that between it and the horny wall there is left an 

 area of sensitive laminae i to 2 cm. wide, in order that there 

 may be sufficient room in the soft tissues for the application 

 of the sutures, as shown in Fig. 2. The lines of incision 

 through the coronary band should be so located as to . in- 

 clude between them the entire lateral cartilage. 



The isolated flap is now dissected closely against the os 

 pedis and its ala and from the lateral surface of the 

 cartilage, the operator first lifting the flap with forceps, 

 later with the hand. Above the cartilage toward the 

 fetlock the operator must keep the fingers of one hand 

 against the external skin in order to avoid cutting through 

 it or thinning it too much at this point. The flap is held 

 turned upwards by an assistant or a strong suture is passed 

 through it and turning it upwards the suture ends 

 are carried around the pastern and tied. As a rule 

 there is now seen a prominent, greenish colored necrotic 

 piece of cartilage surrounded by bi'ownish red masses of 



