Which reason best explains why rodents and rabbits are not fasted prior to surgery?

Which reason best explains why rodents and rabbits are not fasted prior to surgery?

• A. They need to eat at regular times to prevent malnutrition.
• B. They do not vomit.
• C. They will not tolerate anesthesia without food.
• D. They require prolonged fasting.

Answer: (B)

The key idea is that preoperative fasting is used to reduce the risk of aspiration by emptying the stomach. Rodents and rabbits do not have a vomiting reflex, so fasting does not reduce aspiration risk for them. In fact, withholding food can harm them, potentially causing hypoglycemia or GI stasis, especially in rabbits with their sensitive digestive system. Therefore, there is no need to fast these animals before anesthesia; maintaining regular feeding and hydration is preferred to avoid fasting-related complications.

The key idea is that preoperative fasting is used to reduce the risk of aspiration by emptying the stomach. Rodents and rabbits do not have a vomiting reflex, so fasting does not reduce aspiration risk for them. In fact, withholding food can harm them, potentially causing hypoglycemia or GI stasis, especially in rabbits with their sensitive digestive system. Therefore, there is no need to fast these animals before anesthesia; maintaining regular feeding and hydration is preferred to avoid fasting-related complications.