Normokalaemic uroperitoneum in a dog

Re: Normokalaemic uroperitoneum in a dog

james herriot lied — Thu, 10 Jan 2013 08:43:55 GMT

Bet I'm prettier than you........

Re: Normokalaemic uroperitoneum in a dog

Evelyn Barbour-Hill — Thu, 10 Jan 2013 01:52:55 GMT

[quote user="james herriot lied"]But then my brain starts to hurt.[/quote]

That would be due to your new avatar.

Sorry

Re: Normokalaemic uroperitoneum in a dog

james herriot lied — Wed, 09 Jan 2013 22:53:13 GMT

[quote user="Elisabeth Knappett"]

Does vomiting not cause hypokalaemia if severe and significant enough? Would that be enough to reduce the hyperkalaemia from the other issues? Otherwise, ditto, dunno.

[/quote]

Sorry, last post was replying to Michael - didn't expect any other people around at this time of night (!)

The vomiting had been prior to first surgery, but none since. The reduced intake could have caused a whole body deficit, which then translated as normokalaemia, I suppose.

Re: Normokalaemic uroperitoneum in a dog

james herriot lied — Wed, 09 Jan 2013 22:49:37 GMT

Good point, but the urea/creatinine, sodium and chlorine had all gone as predicted.

There wouldn't be any expected difference in permeability of the peritoneum to potassium, but I guess the low blood sodium ought to have peristently triggered a Na/K exchange - to preserve Na and chuck out K. If some/most of that K was then exiting the body - the hole was pretty small, and most of the fluid volume was probably ingress through the inflamed peritoneum - and the relatively low peritoneal fluid Na was then equilibrating with blood sodium, it could have continued to keep the blood Na down. But I don't see why the low urine Na would have more effect on blood electrolyte than would the high urine K - particularly if the ion exchange mechanism kept ramping up to push more and more K out (and thus in part, into the abdomen and then back to bloodstream).

But then my brain starts to hurt.

Re: Normokalaemic uroperitoneum in a dog

Elisabeth Knappett — Wed, 09 Jan 2013 22:45:21 GMT

Does vomiting not cause hypokalaemia if severe and significant enough? Would that be enough to reduce the hyperkalaemia from the other issues? Otherwise, ditto, dunno.

Re: Normokalaemic uroperitoneum in a dog

Michael Woodhouse — Wed, 09 Jan 2013 22:41:10 GMT

Because the dog was managing to void some urine? I imagine the urine K+ concentration would be through the roof, but if it managed to squeeze 50% out and 50% back in there is still a good bit of potassium excretion.

Dunno.