AR YTENECTONOM Y. 65 



The trachea tube is to be removed and cleansed daily as 

 long as its use is necessary, and when discontinued the 

 wound should be left open and dresse'd antiseptically. 



13. ARYTBNECTOMY. 

 Plate XII. 



Object. The relief of roaring or larynigismus paralyticus . 



Instrumenst. Razor, scissors, scalpel, razor shaped 

 knife with long handle, long curved scissors, long curved 

 uterine dressing forceps, double tenaculum forceps, trachea 

 tube, retractors, reflecting lamp, absorbent cotton and dress- 

 ing material. 



Technic. Perform tracheotomj' as advised in preced- 

 ing chapter. Secure the animal in lateral recumbency 

 preferably upon the operating table and induce complete 

 anaesthesia closing the trachea tube in the meantime or 

 administering the chloroform througfi this by means of a 

 bent funnel while the nostrils are occluded by tampons. 

 Shave and disinfect the skin over the laryngeal region. 

 Place the animal upon its back with the head extended and 

 remove the halter or other head gear. If necessary continue 

 the adminstration of chloroform through the trachea tube 

 by means of a funnel the small end of which is inserted in 

 it 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 skin and subcutem be- 

 ginning at the anterior part of the thyroid cartilage and ex- 

 tending backward on the median line of the 3rd. or 4th. 

 tracheal ring. Control the cutaneous- hemorrhage. Con- 

 tinue the incision through the subjacent muscular tissue 

 being careful to follow the median line exactly until the 

 crico-thyroidean ligament, CTL, Plate XII, the cricoid 

 cartilage C, and the first tracheal ring' TRI, are laid bare. 



5 



