462 OPEEATIONS ON THE RESPIRATORY APPARATUS. 



which he introduces into the guttural pouches by passing it 

 through the nasal cavities and the Eustachian tubes. Although 

 in performing this operation the animal is thrown down, it is very 

 difficult to accomplish, and requii-es to be preceded by the operation 

 of tracheotomy. It also requires to be repeated several times, by 

 reason of the Liability of the collection to return. 



The mode of operation is a matter of no importance, since the 

 solutions of continuity resulting from it seldom assumes a form 

 more serious than that of an ordinary simple wound, and requir- 

 ing no special directions as to treatment. Even ordinary de- 

 tergent washes are scarcely necessary. 



LAETNGOTOMY— AEYTENECTOMT. 



The history of surgical interference at the larynx, to relieve the 

 peculiar difficulty of respiration known as roaring, depending 

 upon paralysis of the laryngeal muscles, dates as far back as 1845, 

 when Professor Gunther, of Hanover, attempted, in succession, the 

 resection of the vocal cords, the removal of the vocal cord of the 

 paralyzed side of the larynx, the partial excision of the arytenoid 

 cartilage, the entire extirpation of that cartilage, the removal of 

 the vocal cord and of the corresponding laryngeal ventricule, and 

 finally the fixation of the arytenoid, hy an anchylosis at its artic- 

 ulation with the thyroid cartilage. The results obtained by Gun- 

 ther were more or less successful. 



These experiments were repeated by Gerlach, H. Bouley, 

 Stockfelth and Bassi, but subsequently repudiated and ignored. 

 But in later years Professor MoUer, of Berlin, and George Flem- 

 ing, of Loudon, have turned their attention to the subject, with the 

 suggestion of various new modes of operating, which have yielded 

 resvilts more or less encouraging. The matter has been followed 

 up by other veterinarians in various parts of the world, and re- 

 cently especially by Professor Cadiot, and the successes which 

 have been recorded, though not always perfect, seem to justify the 

 prosecution of further inquiries and new trials for the reUef of a 

 disease which has thus far baffled the skill of veterinarians, and 

 consigned many a valuable animal to the hands of the knacker. 



The operation of Professor MoUer, also recommended by Pro- 

 fessor Cadiot, as at present practiced, is the excision of the parar 

 lyzed cartilage. That of George Fleming is the removal of the 



