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Hello, I am Dr RB and I am a small animal veterinarian. Typically, I delay anesthesia when patients are stressed with or without fever due to complications that can occur once anesthesia is in place. Greyhounds are typically tricky because that have such a high metabolic rate that they run warmer and may be normal for them and not for another dog. It depends on breed, age and severity of hyperthermia. Normal temperature in a dog should be 100-103.5 degrees..The upper range of which I would not apply gas anesthesia. Not all veterinarians adopt a three way anesthetic protocol including a "pre-medication" injection given intramuscularly to relieve anxiety and provide analgesia, then an IV anesthetic to induce unconsciousness and is maintained on gas anesthesia. Fluids given intravenously before surgery would also cool temperature and during surgery would maintain normal temperature. Anesthesia typically makes body temperature decline but, in some cases, hyperthermia can occur with stress, increased metabolism of anesthesia (and not being fully "under), increased respiration (producing increased CO2) and other factors. I would make sure in the future that Jasper is given enough time prior to anesthesia to relax, be given an injection 15-30 minutes prior to surgery to help him relax and be placed on intravenous fluids 1-2 hours before his surgery until 1-2 hours after his surgery.
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Hello:) I was just checking in to see if I had answered your question about Jasper and anesthesia induced hyperthermia? Let me know if you have additional questions. If you are satisfied with my response, please take the time to rate my response positively;)