452 



TRACHEOTOMY 



simple ; but in fat horses there may be a little bleeding and more 

 difficulty, though no danger. The edges of the wound are held 



Fig. 354. — Making the incision. 



Fig. 355. — Introducing the cannula. 



apart with the fingers of the left hand, or with a retractor, while 

 the connective tissue covering the trachea is divided in the middle 



Fig. 356. — Method of performing tracheotomy. — a, Square opening; 6, vertical 

 opening ; c, oval opening. (Hering.) 



line. Up to this point the procedure is the same in both 

 methods. 



In the operation without removal of cartilage, the trachea is 



