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Protrusion And Inversion of tiie Bladder in a Mare. 
By M. F. Devaux. 
On the 21st of April, 1820, I was desired to see a carriage 
mare that had aborted fifteen days previously. A tumour from 
nine to ten inches in diameter protruded from the vulva. The pro- 
prietor told me, that, on presenting her to a horse in order to be 
covered, the stallion was unable to introduce the penis into the 
vagina; that, on opening the labia in order to ascertain the cause, 
he observed, towards the inferior commissure, a tumour, about 
the size of his fist ; that it gradually increased in size, and ap- 
peared largest when the mare was endeavouring to stale. She 
was often straining for this purpose, and the water ran from her 
in small quantities. 
This tumour was of an oblong form, and occupied the inferior 
part of the vulva ; it diminished very much towards its base, 
where it assumed the form of a kind of peduncle. Its surface 
was red, soft, and chapped in various places : at the base on each 
side was a little nipple-formed opening, whence, every five or six 
minutes, there escaped a white fluid, somewhat thickened, which 
I considered to be the urine, and these openings to be the ureters. 
I immediately recognized the tumour as an inversion of the blad- 
der. When I attempted manually to examine it, the mare 
struggled violently, and threw herself down, and there ensued a 
violent distention and bruising of the tumour. It became more 
profoundly chapped in various places, in a direction from above 
downwards, and through the whole length of the tumour; and 
in the course of five or six minutes five or six pints of blood 
were discharged. I washed it with vinegar and water to no pur- 
pose. I then had recourse to pure vinegar, and the hemorrhage 
ceased. 
The mare being raised, and more quiet, I proceeded to the re- 
duction of the tumour. I caused it to be supported by an 
assistant, and by gently pressing on its sides and inferior extre- 
mity with my fingers and hand, I succeeded in completely re- 
turning it. I still continued to hold my hand firmly pressing on 
the base of the bladder for nearly half an hour; and the mare 
being quiet, and I plainly feeling the contraction of the sphincter 
on my arm, I hoped that the bladder would retain its position 
without the aid of a pessary. 
At length 1 gently withdrew my hand from the meatus urina- 
rius, being assured that its neck contracted more and more. I 
ordered the head of my patient to be tied up during four hours, 
prescribed for her a very restricted diet, and left her. No unto- 
