OOPHORECTOMY IN MARES. 



261 



bowel being much less. The ecraseur must be considerabh- longer 

 and stronger than those in common use ; Delamotte uses one twenty- 

 four inches in length. The chain or wire of the ecraseur must also 

 be stronger, otherwise it is very liable to break. 



The operation becomes much more difficult when the animal has 

 to be cast ; to prevent the straining which always occurs under these 

 circumstances, deep anaesthesia is necessary ; otherwise the operation 

 is as above described. A few mares were operated on in this way at 

 the Berlin Veterinary College during the writer's period of study 

 there. One was an emaciated experimental animal with a short 



Fig. 272. — Longitudinal incision in a vertical plane through the posterior abdo- 

 minal region, pelvis, and urino-genital organs of a cow. The section is 

 somewhat to the right side of the median plane. The figure illustrates the 

 second stage of ovariotomy : the hand is grasping the left ovary. 



o. Ovary. u. Uterus. v. Vagina. r.h. Right horn of the uterus (cut 

 through). L.H. Left horn of uterus. b.u.l. Broad uterine ligament. R. 

 Rectum. bl. Bladder. p. Pelvis. .\.\v. Abdominal wall. E.s. Excavatio 

 superior. e.r. Excavatio recto-vaginalis. e.v. Excavatio vesico-vaginalis. 

 E.I. Excavatio inferior. 



croup, in which operation proved comparativel}' eas)'. The next 

 was a more powerful animal with a longer croup, and could only 

 be castrated after deep chloroform anjesthesia. Though very difficult, 

 the operation succeeded. During the following few da5's there was 

 little disturbance, and the animal eventually proved cured. Cadiot 

 places the animal in a trevis, which is a great advantage. He 

 adopts Colin's method of cutting through the peritoneum, and con- 

 demns the suggestion to divide it with the fingers, on account of the 

 serosa dissecting off and forming a pocket. Cadiot's general procedure 



