70 ROARING OPERATION. 



visible vessels. Dust the wounds thoroughly with iodoform 

 and tannin and if the capillary hemorrhage is great pack 

 the larynx with a single strip of iodoform gauze and secure 

 it by sutures through the margin of the skin wound. Re- 

 move this tampon after twelve to twenty. four hours. Wash 

 and disinfect the wounds daily. 



Remove the trachea tube daily and cleanse, and retain it 

 in position for 6 to lo days or until the animal breathes 

 freely without it. After about 8 days insert the retractors 

 in the laryngeal wound, dilate it, examine the interior 

 with the aid of a lamp and give any needed attention to 

 unhealthy granulations or other untoward conditions. 



14. ROARING OPERATION BY EXCISION OP THE VOCAL 

 CORDS AND VENTRICLE OP THE LARYNX. 



Pl<ATE XIII 



Objects. The same as in the preceding operation except 

 that we attempt to relieve roaring by causing the arytenoid 

 cartilage to become fixed against the side of the glottis by 

 cicatricial adhesion. 



Instruments. Same as in the preceding. 



Technic. The technic of this operation is identical with 

 the preceding until the larynx has been been opened. 

 Grasp the left vocal cord with the double tenaculum for- 

 ceps, one jaw of which rests in the ventricle and lift it up- 

 wards until the parts are rendered tense. With the razor 

 shaped scalpel make an incision parallel with the long axis 

 of the vocal cord on the tracheal side of it through the mu- 

 cous membrane and cord and continue this incision forward 

 internally along the immediate border of the arytenoid car- 

 tilage barely through the mucous membrane and laterally 

 make a similar cut directed forwards approximately i to 

 ij^ cm. distant from the preceding as indicated by the 

 dotted line in Fig. i, Plate XIII. Keeping the parts in- 



