She also refers pets that have had a prior adverse reaction to anesthesia.
“In my practice, we recently had to cut a procedure short because a dog’s blood pressure dropped, and we were having trouble keeping it in a safe range, despite our best efforts,” says Fraser.
Once the animal is under, the veterinary team inserts a breathing tube to keep the airway open and to deliver an inhaled anesthetic gas, which will keep the pet unconsciousness during the procedure.
Tufts vets administer pain relievers in addition to anesthetic drugs.
“If you are conscious and very dehydrated, you will faint, which brings your head level with your heart,” making it easier for blood to get to the brain, Karas says.