Catheter] 39 [Catheter 



dogs the size of terriers No. i 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 lono- 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. 



