Читать книгу The Dog's Medical Dictionary - Alfred Joseph Sewell - Страница 56

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The passage (called the urethra) to the bladder is very small in the dog in consequence of there being a bone in the penis. It is also very long. The best kind of catheters are made of gutta-percha, and for small dogs the size called 0 is large enough. For dogs the size of terriers No. 1 size is required; for collies, etc., No. 2 size; and for larger dogs No. 3. These numbers refer to the diameter. As to length, they must, of course, vary also according to size of the dog—10 inches, 12 inches, 18 inches, and 2 feet respectively. Before being passed, the catheter must be well smeared over with vaseline, and the wire left in. The dog should be placed on his left side, with the right hind leg well drawn forward; the penis should be exposed for some inches, and held by means of a soft cloth; the catheter may then be gently passed. After going a short distance, that is to where the penis bends round, it will stop going in, or, at any rate, at this point it will be found a little more force is required to pass the instrument. When this part is reached, the wire should be drawn out for one or two inches, according to the size of the dog, then it will be found the catheter will pass on easily again; and when the bladder is reached, if it is full of water, it will commence to drip or dribble away—it never runs away fast, as the orifice in the catheter is small. Let the catheter remain in so long as urine continues to flow, and then gently withdraw it.

A catheter should never be passed more than twice a day. The instrument, when not in use, should, without the wire, be kept in a basin of saturated solution of boracic acid. The wire should be thoroughly cleaned and vaselined, and be put into the catheter just before being used.