ARYTENECTOMY. 6i 



the incision upward and inward until the ring is cut about 

 Yz in two, when the incision is turned downward to eventu- 

 ally reach the starting point, the isolated section of the tra- 

 chea being securely grasped by a pair of forceps before its 

 excision is completed. By this method no tracheal ring is 

 severed. 



The trachea tube is to be removed and cleansed daily as 

 long as its use is necessary, and when finally removed the 

 wound should be left open and dressed antiseptically. 



13. ARYTENECTOMY. 



Pl,ATB XI. 



Object. The relief of roaring or laryngismus paralyticus. 



Instruments. Razor, .sci.ssors, scalpel, razor shaped 

 knife with long handle, long curved sharp pointed scissors, 

 long curved uterine dressing forceps, double tenaculum for- 

 ceps, trachea tube, retractors, reflecting lamp, absorbent cot- 

 ton and dre.ssing material. 



Technic. Secure the animal in lateral recumbency 

 preferably upon the operating table and induce complete 

 anaesthesia. Shave and disinfect the skin over the laryngeal 

 region and also over the trachea at the usual point for 

 tracheotomy. Place the animal upon its back with the head 

 extended and remove the halter or other head gear. Per- 

 form tracheotomy in the manner described above, insert the 

 trachea tube and if necessary continue the administration of 

 chloroform through this by means of a funnel the small 

 end of which is inserted in the trachea tube while the 

 chloroform is dropped on a towel spread over the larger end. 

 The operator takes his place on the right side of the animal 

 and the assistant on the left. Make a, longitudinal incision 

 through the skhi and subcutem beginning at the anterior 

 part of the thyroid cartilage and extending backward on the 

 median line to the 3rd or 4tli tracheal ring. Control the 

 cutaneous hemorrhage. Continue the incision through the 



