474 



OPERATIONS ON THE EESPIKATOKY APPARATUS. 



Aj^ 



Fig. 416.— 5c? step, c, Section of the Arytenoid near its Articular Angle. 

 A, Laryngeal Branch of the Thyro-Laryngeal Artery. 



raised with the forceps, the scissors are introduced under its poste- 

 rior portion, with the branches held almost vertically, and close to 

 the cartilage, from behind forward, and the fibres of the arytenoid 

 muscle are nipped off. With careful attention, the perfect dissec- 

 tion of the entire cartilage, including its beak, may be effected. 

 During this part of the operation, blood and pharyngeal mucosi- 

 ties may interfere with the manipulations, and must be removed 

 with pieces of soft cloth, wadding or sponges. 



When these various manipulations have been well executed as 

 described, the surface left by the loss of substance presents a neat 

 and smooth appearance, not only on its borders, but over its en- 

 tire extent. Professor Cadiot, in this step of the operation, omits 

 the excision of the vocal cord, which he considers unnecessary. 



Fourth Stage. Suture. — The borders of the wound are brought 



