ICVA Exotic Animal Anesthesia 2 — Questions and Answers
Question 1: Which inhalant anesthetic is most commonly recommended for reptiles due to its rapid induction and recovery profile?
- Halothane
- Isoflurane (Correct answer)
- Methoxyflurane
- Enflurane
Correct answer: Isoflurane
Isoflurane is preferred in reptiles because it provides smooth induction, stable cardiovascular effects, and rapid recovery compared to older agents.
Question 2: What is the primary concern when anesthetizing a chelonian (turtle or tortoise) regarding respiratory monitoring?
- Hyperthermia risk
- Ability to breath-hold voluntarily for extended periods (Correct answer)
- Excessive mucus production
- Rapid oxygen consumption
Correct answer: Ability to breath-hold voluntarily for extended periods
Chelonians can voluntarily breath-hold for prolonged periods, making respiratory rate an unreliable anesthetic depth indicator.
Question 3: Which analgesic class has demonstrated the least clinical efficacy in birds due to differences in opioid receptor distribution?
- NSAIDs
- Mu-opioid agonists (Correct answer)
- Alpha-2 agonists
- Local anesthetics
Correct answer: Mu-opioid agonists
Birds have a different distribution and density of mu-opioid receptors compared to mammals, making mu-opioid agonists less effective analgesics in avian patients.
Question 4: A ferret presenting for adrenalectomy requires premedication. Which combination is most appropriate?
- Acepromazine and butorphanol
- Ketamine and diazepam
- Medetomidine and butorphanol (Correct answer)
- Atropine alone
Correct answer: Medetomidine and butorphanol
Medetomidine combined with butorphanol provides reliable sedation and analgesia in ferrets with a manageable cardiovascular profile.
Question 5: What is the recommended body temperature range to maintain during anesthesia in most lizard species?
- 15–20°C
- 25–35°C (Correct answer)
- 37–39°C
- 40–42°C
Correct answer: 25–35°C
Lizards are ectotherms and their metabolic and anesthetic drug metabolism is optimized within their preferred optimal temperature zone of approximately 25–35°C.
Question 6: Which route of administration is most reliable for delivering ketamine to a fractious iguana when IV access is not available?
- Oral
- Intramuscular (Correct answer)
- Subcutaneous
- Intraosseous
Correct answer: Intramuscular
Intramuscular injection into the epaxial muscles or forelimbs provides reliable absorption of ketamine in iguanas when IV access cannot be established.
Question 7: In small passerine birds, the greatest anesthetic risk compared to larger birds is attributed to which physiological difference?
- Lower heart rate
- Higher metabolic rate and rapid drug metabolism (Correct answer)
- Thicker feather insulation
- Lower lung volume
Correct answer: Higher metabolic rate and rapid drug metabolism
Small passerines have extremely high metabolic rates, meaning anesthetic drugs are metabolized quickly and hypothermia risk is markedly elevated.
ICVA Exotic Animal Anesthesia 2
Which inhalant anesthetic is most commonly recommended for reptiles due to its rapid induction and recovery profile?