Final answer:
Anesthesia machines are used to administer general anesthetics, which may be volatile liquids or gases, to induce anesthesia in fractious animals. Intravenous injectables are also used for anesthetic induction and are sometimes combined with sedatives like benzodiazepines for more efficient restraint.
Step-by-step explanation:
To induce anesthesia in fractious or vicious animals that cannot be safely restrained, a type of equipment known as an anesthesia machine is used. The machine allows for the administration of general anesthetics, either in the form of volatile liquids or gases that are then vaporized and delivered to the animal. Injectable anesthetics might also be used to induce a state of unconsciousness. Drugs such as propofol, etomidate, methohexital, and in certain situations, ketamine, can be administered. Benzodiazepines like midazolam could be used in combination with other general anesthetics for sedation.
With the use of an anesthesia machine, a mixture of oxygen, anesthetics, and ambient air is composed and delivered to the animal, maintaining the necessary monitoring of both patient and machine parameters. This process is essential to ensure safe and effective anesthesia during veterinary procedures while minimizing pain and distress in animal research subjects.