3l8 CLINICAL VETERINARY MEDICINE AND SURGERY. 



The left nasal cavity was therefore trephined, an incision about 

 three quarters of an inch long being made opposite the centre of the 

 nasal bone ; at each end two circular trephine openings were made, 

 and the intervening portion of osseous tissue removed with scissors. 

 It then became evident that the anterior part of the maxillary tur- 

 binated bone was markedly hypertrophied. On being trephined the 

 inferior maxillary sinus was found healthy. The anterior part of the 

 diseased turbinated bone was first removed with strong forceps through 

 the lower opening, the remainder being excised through the nasal 

 opening. The nasal cavity and sinus were plugged with gauze. 



The mare was returned to her box. Temperature 38"6° C. For 

 about half an hour blood dripped from the left nostril. 



All the extirpated portion of the turbinated bone was inflamed, 

 thickened, and violet in colour ; it measured four inches in length and 

 two to two and a quarter inches in diameter. Its upper half was hard 

 and for the most part ossified. Towards the centre it appeared 

 necrotic, and contained a cavity filled with caseous pus ; the lower 

 portion formed a kind of ovoid tumour measuring two inches in 

 length and an inch and a half in diameter, firm and homogeneous 

 in consistence, and of a whitish-red tint on section. In the lower 

 portion of the turbinated bone the histological characters were those 

 of inflammatory hypertrophy, with numerous small osseous tracts 

 dispersed through the newly-formed fibrous tissue. 



On the loth the tampons were removed, and the nasal cavity 

 washed out with warm boric solution, which brought away clots and 

 a few fragments of necrotic tissue. General condition and appetite 

 excellent. Temperature 38*5° C. The nasal cavity was left open. 

 During the night it was washed out with boric solution. 



On the nth the expired air had the smell peculiar to caries. The 

 boric injections were alternated with creolin solution. Temperature 



38-4° c. 



From the 12th to the i6th similar treatment. Discharge remained 

 somewhat free. The submaxillary glands increased in size. Tem- 

 perature normal. 



On the 17th the pus was less abundant and less foetid. The warm 

 creolin solution was continued. 



On the two following days the patient showed symptoms pointing 

 to mechanical pneumonia. The temperature was 40*2° C. ; the respi- 

 ration 48 per minute, whilst the pulse was only 44. 



On the 20th discharge was less abundant, and the general condition 

 had greatly improved. 



On the 2ist all unfavourable symptoms had disappeared. 



From the 22nd to the 27th the injections were continued ; suppura- 

 tion was trifling. The opening in the maxillary sinus had entirely 

 closed: that in the nasal bone was still open, but had greatly con- 

 tracted. The discharge from the nostril had considerably diminished. 



From the 28th February to the 5th March treatment continued 

 the same. The opening in the nasal bone had then nearly closed. 

 Discharge was very trifling. Expiration and inspiration were normal, 

 and scarcely any interference with inspiration could be detected. 



