Opening a can of worms.
[QUOTE=alabama;5645111]
Well, about the pre-anesthetic panel… I have gotten funny looks when I’ve declined that for a spay or neuter. Then I get the, “Oh, well I guess you don’t want pain meds, either.” Ummm, what? Of course I want pain meds but if the cat can’t be spayed/neutered because the blood work is off, it’s a no go for me anyway. I just can’t add any more cats to the population around here. This, honestly, goes for the (semi-feral) strays and the house cats. (The house cats are all former strays, anyway.)
I also declined blood work before my 12 yo cat had his teeth examined. Vet called me right after I dropped him off and said they had to do it if a cat was over a certain age. Well, ok. Whatever. But seriously, the whole side of the cat’s face was a hard, swollen mess. In my mind it would be better for him to succumb to the anesthetic on the table than come home with no surgery/procedure and what I was pretty sure was a nasty abscess (it was) and no doubt a HUGE headache for however long he lasted. Hell, it could have been a tumor for all I knew but I knew when I took him in he’d have to go under the gas. Why can’t I make that call? If he didn’t make it, it would break my heart - but I would have signed a release. I knew the risks.
All the above was from different regular vets. I get it that vets have to deal with unreasonable people quite often, people who don’t pay, etc., but I do think that some of this stuff should be talked over between the owner and vet (not the front desk & owner) so the vet has some idea where the owner is coming from. In the case of the 12 yo cat with the abscess, I’m pretty sure the vet never even heard about my denial for pre-anesthetic, much less the reason why. It was just a generic policy.[/QUOTE]
Ok, I will open this awful can of worms. And am apt to get pretty flamed by others, esp vets, for it. Mind you, this is MY opinion, and take for that.
I am not a big adovocate of pre-op blood work FOR PRE-OP’S sake!! I am a consultant for VIN (Veterinary Information Network) in Anesthesia so I field alot of anesthetic death/complication questions. They almost always start with “blood work was normal”. Yeah, so? There is NOTHING in blood work that that cause a pet to die under anesthesia. Nothing. So let’s pick it apart as to why.
Kidney values: Patients cannot die of acute kidney failure in the course of even a vet school anesthetic period. No matter how bad the lab values are.
Liver: Patient cannot die of acute liver failure… Liver values have no effect on today’s anesthestics. Way back when this was true but not anymore. Heck how do you think we anesthetize animals to take out gall bladders, liver tumors, fix liver shunts, etc? The liver tests on a routine panel also tell you very little, if anything, about liver FUNCTION. You need different tests to determine that.
And then there really isn’t anything else on the blood panels anybody gets excited about.
Remember I do emergency work. Even if I do blood work before a surgery it is not going to keep me from doing surgery. The pet needs the surgery now, period.
Oh, what DOES the blood work really do for us? It gives us a chance to screen the patient for problems we might otherwise not know about. Things we may want/need to manage AFTER surgery/anesthesia. So the pet’s kidneys aren’t the greatest. Be sure it is on fluids before, during and after surgery. Avoid giving NSAID’s until the pet is awake. Ok, you say, how do you know to do this without the blood work? Look at the patient. I will bet that any cat (or dog) over the age of 5 or 6 does not have the same degree of kidney function it did when it was a year old. So just support the kidneys anyway. It is good medicine. A patient should come out of an anesthetic at least as good, if not BETTER, than it went in. No matter how healthy it was to start with.
If I had to pick what I want for pre-op lab work…Urinalysis looking for 1) glucose 2) protein and 3) specific gravity. These will clue me into early kidney disease and maybe early diabetes. (Note: there has to be AT LEAST 70% loss of kidney function before a blood value is abnormal. Specific gravity changes much earlier). PCV/TS: lets me know if patient is anemic (unlikely if PE was normal), what his protein level is (that can be sneaky) and if his WBC count is roughly normal. However, none of these will make me change my anesthetic protocol. It will however guide me as to whether or not I should look further. BUT it doesn’t tell me anything about liver stuff. And I admit that.
What will make me change my anesthetic protocol? The patient. Old, young, stupid crazy, quiet and laid back, sick, critical, normal, heart murmur, activity level, etc. And then, how it is responding to the anesthesia. No 2 patients quite the same.
I preach this to vets all the time. Most of the time it falls on deaf ears and I often feel like the little boy in The Emperor’s New Clothes. IDEXX and the other lab companies have done a tremendous “educational” campaign to teach us “the value” of pre-op blood work. And we have bought it hook line and sinker.
Is the bloodwork of value? Yes. Will it change the outcome of the anesthetic? No.
Patients die under anesthesia for reasons other than bloodwork abnormalities.
However, I do still encourage doing bloodwork at the time of surgery. Like I said, it gives us a chance to screen for things that might be lurking and to act on them before they become major clinical problems.
Ok, now that I have thoroughly stirred that pot and will surely piss all your vets off when you go in and tell them this…
Now, your 12 yr old cat with the abscess. That cat I would suggest blood work on. I don’t know how your vet does their anesthesia but… in a cat this age I will bet that he has some early kidney dysfunciton. Prob not clinical. May not even show up on blood work. Since I know this I would be sure the cat is on fluids during anesthesia and afterwards. I would however like to know what his kidney levels are so I can counsel YOU as to what to do, if anything. And esp if your vet is going to use an NSAID in the cat for pain control. If he had kidney “issues” will it change the outcome of anesthesia? No (not even if all they use is Ket/Ace!). But it may well dictate what to do AFTER anesthesia.
And I wholeheartedly agree that this stuff needs to be discussed between vet and owner. Should it be broached initially by the staff? Yes. Be details, etc should be between DVM and O. Again, just my opinion. And my anal retentive, controlling, perfectionist, type A personality.