This is what they used on my yorkie. Halothane.
THE HAEMODYNAMIC EFFECTS OF HALOTHANE IN DOGS
http://bja.oxfordjournals.org/cgi/co...tract/45/5/416
Analogue techniques were applied to measurements of phasic aortic blood flow and pressure to obtain continuous recordings of peripheral vascular resistance and circulatory function in open-chest dogs during basal narcosis with chloralose. Whereas the hypotension following hexamethonium 1 and 3 mg/kg i.v. was associated with a marked fall in peripheral vascular resistance and some reduction of maximum acceleration and cardiac output, the hypotension during ventilation with 1 and 2% halothane
was associated with a large reduction in maximum acceleration (i.e. cardiac depression) and cardiac output with a relatively small fall in peripheral vascular resistance. In closed-chest dogs 1–2%
halothane caused falls in arterial blood pressure and heart rate similar to those after hexamethonium 1–3 mg/kg i.v. without comparable impairment of either vagally-induced bradycardia or the contractions of the nictitating membrane due to sympathetic nerve stimulation. Ganglion blockade did, however, become prominent with concentrations of 4% halothane. It is thought that diminished central vasomotor tone, a reduction of the effects of the sympathetic mediator on blood vessels and a direct relaxant effect of halothane on vascular smooth muscle also contribute importantly to the peripheral vascular depression.
SORRY BUT ALL VETS SHOULD KNOW THIS!!!
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Quote:
Originally Posted by Leesha  Alex's Yorkie Care Frequently Asked Questions. Page 3.
My Yorkie needs surgery. What should I know about anesthesia and intubating?
There are a couple of different dangers in surgery for toy dogs and they are not insurmountable, but they are VERY SERIOUS.
1) DON'T ever allow the vet technician to intubate your toy dog. Too many small toy breeds have had TRACHEAL INJURY and suffered and DIED because of collapsing tracheas from injury to the trachea during intubation. Make sure that the vet knows that you expect him/her to use the smallest possible tracheal tube to intubate your toy dog. Speak up! It could mean saving the life of your little dog. If the vet treats you like an "overprotective" Mom, find another vet that will understand.
2) Proper use of Ace Promezaine as a pre-anesthetic injection is ok so that the dog can be intubated.
3) Isoflurane is the anesthetic of choice. Don't use Halothane or any of the barbituates (see number 4, below). Some vets will "mask" a tiny dog with Isoflurane rather than use the injectable and some vets will not intubate at all, but this depends on the type of surgery being performed. This is an excellent method whenever possible.
4) Last but not least, DO NOT ALLOW YOUR VET TO USE ANY KIND OF BARBITUATES TO ANESTHESIZE YOUR TOY DOG. MOST PARTICULARLY NOT PENTABARB. Many toy dogs have died needlessly because of UNINFORMED VETS WHO ARE DECADES BEHIND IN USE OF ANESTHETICS FOR TOY DOGS. If your vet thinks Isoflurane is too expensive and refuses to use it, then FIND ANOTHER VET THAT will use it. It could and probably will save your dog's life. |