Urine output in cat

Re: Urine output in cat

bongo — Fri, 01 Apr 2011 22:05:46 GMT

my cat had a blocked bladder and his slippery sam fell apart :( thankfully they could just about get the catheter out before it went up his urethra. I have however known one that had to be retrived from the bladder also.

Re: Urine output in cat

Claire Bloor — Tue, 29 Mar 2011 22:18:41 GMT

Hi everyone

Like the others have said, so long as you have 1-2ml/kg/hour being produced life is good. It indicates optimal glomerular filtration rate, which is most important.

I have never come accross any research (but I may do a more focused search now out of interest when I have a minute!) that recommends you should be routinely calculating expected fluid output from a patient on IVFT; it is very individual to the patient, their clinical signs and symptoms, underlying causes, oral fluid intake etc etc. If they started producing vast qualtities of dilute urine then yes your IVFT is working, but would that not be indicative of excessive body fluid content? Their body has been rehydrated to the required volume and more besides, so they are then excreting the excess.

In practice I would monitor for the 1-2ml/kg/hour urine production and regularly monitor the patient as usual for the subtle signs of overinfusion, like nasal discharge, chemosis, oedema cranial to the gastroc tendon etc etc.

And yes...the slippery sams do come to pieces. Thankfully I have never seen one that has come apart in a patient!!!

Re: Urine output in cat

Sal the 1st — Tue, 29 Mar 2011 22:05:11 GMT

[quote user="Kim Blowing"]I didn't realise until after this particular incident and then saw that it was actually written on the wrapper. I think the idea with a slippery sam is to pass it first and then replace with a normal Tom cat catheter.

[/quote]

yes that was my understanding also

Re: Urine output in cat

Kim Buckley — Tue, 29 Mar 2011 21:52:31 GMT

I didn't realise until after this particular incident and then saw that it was actually written on the wrapper. I think the idea with a slippery sam is to pass it first and then replace with a normal Tom cat catheter.

Re: Urine output in cat

Celine — Tue, 29 Mar 2011 21:46:28 GMT

Oh heck!

We've just started using them lately as we've had a couple of huge cats whose indwelling catheters wouldn't drain despite no resistance on flushing: they were simply too short and not in the bladder when distended.

Will tell the vet tomorrow, that's not going to go down well...

Re: Urine output in cat

Kim Buckley — Tue, 29 Mar 2011 21:40:51 GMT

Slippery sams aren't supposed to be left in and I have seen one come apart when left in and had to surgically remove it from the bladder!

Re: Urine output in cat

Celine — Tue, 29 Mar 2011 21:24:47 GMT

Hmmm.

Now, thats what we initially were going with. But as he is on twice maint IV fluid rate it will obviously be higher than that?

We were then discussing how the standard fluid losses of 50ml/kg/day are comprised, 20ml urine, 20ml respiration, 10ml faeces give or take? So my rationale was that faecal and respiration losses will not increase, even though his fluid rate is twice maint.

So I was proposing that urine will comprise 20ml/kg/day (from a maint rate of fluid) PLUS an additional full 50ml/kg/day (for the second maint dose of fluid). Does that have any logic to it?

Basically the nurse on duty wanted to be able to look at the bag and be sure the catheter wasn't partially blocked and generally running properly. It doesnt help that we've had to fingertrap tie the collection connector to the catheter as they don't seem to "lock" together well and just slip apart easily, so she can't flush it easily by herself (cat is a manic, smoochy mess).

Anyone have any tips for connecting the slippery sams to collection systems?

Thanks guys

Re: Urine output in cat

Nick Shackleton — Tue, 29 Mar 2011 20:52:58 GMT

I would also suggest between 1-2mls/kg/hr

Re: Urine output in cat

rcookieuk — Tue, 29 Mar 2011 20:47:03 GMT

Im not sure what the right answer is but Ive always thought urine ouput should be 1-2mls per kg per hour, this reflects what the fluid intake should be which should be 2ml/kg/hour or 50ml/kg/day. Pretty sure this is what i was taught but would be interested to hear what others think?

hope the cat gets better for you:)