Rebreathing and Non-Rebreathing Veterinary Anesthesia Machines
Use of anesthesia machines has been very helpful in the field of medical science, especially for vets. There are several types of anesthesia that are used to block nerve impulses in order to limit the perception of pain. There are four different types of anesthesia that include local, regional, general and dissociative.
Veterinary anesthesia machines ensure a good surgical outcome and fast recovery following the operation. Two types of anesthesia machines are used in veterinary practice, namely breathing and non-rebreathing. Let’s take a look at both these types of anesthesia machines.
Rebreathing systems are used for animals weighing over 10 pounds. These machines allow exhaled gases to undergo recirculation in the animal’s body. Carbon dioxide is removed from the exhaled gas and fresh oxygen is combined with a strong anesthetic to make sure that the animal remains unconscious during the surgery.
There is a pressure reducing valve which decreases the pressure of oxygen released from the tank to a bearable level. Parts of the rebreathing anesthesia machines such as endotracheal tube and the exhalation hose ensure that the exhaled gases are not taken in by the animal once it has breathed them out.
Non-rebreathing systems are used for animals that are typically under 10 pounds. These small animals need a high flow of gases to prevent rebreathing of carbon dioxide. In this type of system, little or no exhaled gases are returned to the animal, but exit through the pop-off valve.
Non-rebreathing veterinary anesthesia systems are usually not used for larger animals as the high gas flow wastes oxygen. High flow rates also lead to heat and fluid loss from the pet. These systems also ensure less resistance faced during inhalation and exhalation, which is important for small animals.