What are the common inhalant anesthetics used in small exotic rodents, and what monitoring parameters are essential?

• A. Propofol and ketamine; monitor blood pressure and ECG.
• B. Desflurane or methoxyflurane; monitor end-tidal CO2 and respiratory rate.
• C. Isoflurane or sevoflurane; monitor respiration, heart rate, oxygen saturation, body temperature, and depth of anesthesia.
• D. Nitrous oxide only; monitor nothing.

Answer: (C)

Inhalant anesthetics are used in small exotic rodents because they allow precise, titratable control of anesthesia with rapid recovery. Isoflurane and sevoflurane are the go-to choices for these animals due to their rapid onset and offset, good controllability, and relatively favorable safety margins in tiny patients. The key is to monitor several vital aspects continuously to keep the animal safely anesthetized and to detect problems early: respiration is watched closely because inhalants depress breathing, heart rate provides a real-time clue to cardiovascular stability, oxygen saturation shows how well tissues are being oxygenated, body temperature must be maintained since small rodents lose heat quickly under anesthesia, and depth of anesthesia needs to be assessed to keep the animal neither too lightly nor too deeply anesthetized. End-tidal CO2 monitoring can be very helpful when available, but the combination of breathing, heart rate, SpO2, temperature, and a clinician’s assessment of depth covers the essential monitoring needs for these agents. Other listed options either involve injectable agents rather than inhalants, include outdated or inappropriate inhalants, or propose no monitoring at all, making them less suitable for safe anesthesia in small exotic rodents.