. Diseases of the dog and their treatment. tain rough sound felt that resembles crepitation. Lay theanimal on tlie side or back, and after having injected cocaine into the skin 200 DISEASES OF THE URINARY AND SEXUAL APPARATUS (or administered ether if the animal be very hard to handle, although thisprocedure is rarely necessary) insert a well-oiled catheter, make an incisionabout 3 cm, in length, cutting down on the median line on the skin makinga free opening, then cut a second longitudinal incision on the urethra on thestone or on the end of the catheter (Fig. 83); calculus can then be pushe
. Diseases of the dog and their treatment. tain rough sound felt that resembles crepitation. Lay theanimal on tlie side or back, and after having injected cocaine into the skin 200 DISEASES OF THE URINARY AND SEXUAL APPARATUS (or administered ether if the animal be very hard to handle, although thisprocedure is rarely necessary) insert a well-oiled catheter, make an incisionabout 3 cm, in length, cutting down on the median line on the skin makinga free opening, then cut a second longitudinal incision on the urethra on thestone or on the end of the catheter (Fig. 83); calculus can then be pushedback toward the opening in the majority of cases, and by means of a pairof small forceps the stone is grasped and pulled out. In some cases it isnecessary to enlarge the opening in the urethra; as a rule, however, do notmake the opening any larger than is absolutely necessary. Occasionallywhen the stone lies in the canal just under the bone of the penis, it is ex-tremely hard to remove, and after making the incision it has to be forcibly. Fig. S3.—Urethrotomy. Catheter introduced and end seen at the incision. dislodged by means of the catheter. It is well to leave the wound openunless it is a very large animal or the stone should be exceptionally large; inthat instance do not put more than one stitch in it. For two days theluine escapes out of the external opening, but soon closes up, and in abouteight to ten days it has closed up completely and the urine is passed in thenatural way. The wound of the operation is apt to leave a stricture in the course ofthe urethra, and in an animal that is predisposed to the formation of calculiexamine the urethra occasionally with the catheter and if a stricture ispresent dilate it with a bougie. In cases where the stone is situated up in the urethra at the ischialarch it is nuich more difficult to oj^erate on account of the well-developed STONE IN THE BLADDER 201 bulbus cavernosum. The incision must be made down on the catheter,which has
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