346 



VETERINARY SURGICAL OPERATIONS 



young, soft one, which facts should be taken into account in 

 judging its indications. 



EQUIPMENT. — The equipment necessary to perform 

 the operation is: Scalpel, dissecting forceps, tracheotomy 

 tube, clipper, razor and antiseptic solution. 



RESTRAINT.— The operation is always performed in 



Fig. 164— Trachea Tube, with Beveled End to Insert between the Rings. 



the standing position and generally without the aid of local 

 anaesthesia. The latter is, however, very helpful in the rest- 

 ive horse, especially one attacked with a dyspnoea so serious 

 as to render inadvisable the application of the twitch. The 



Fig. 165-166— Well's Tracheotomy Tube. 



Fig. 16S — Opened as if in Position. 



Fig. 166 — Closed Ready to Insert. 



injection of a five per cent solution of cocaine subcutaneously 

 greatly facilitates the work. 



TECHNIQUE.— First Step.— Locating the Seat of Ope- 

 ration.— Tracheotomy in the horse is usually performed in 

 the center of the middle third of the trachea at a -point where 

 the muscles are spare. The location is selected by mental 

 calculation, as there is no land-mark to direct. If for any rea- 



