The ‘Turner’ circle absorber: an anaesthetic breathing system for the horse.

This research article discusses the development of a new inhalation anesthetic apparatus designed specifically for horses, explaining its design concepts and components, with a focus on minimizing resistance and dead space while maximizing efficient carbon dioxide elimination.

Overview of the Research

The researchers in this paper have designed a new anesthetic breathing system for horses, which they dubbed the ‘Turner’ circle absorber. The system has been designed with a constant internal diameter across all breathing components, and places significant focus on the challenge of delivering anaesthetics with minimal resistance and dead space.

Key Features of the ‘Turner’ Circle Absorber

• The ‘Turner’ circle absorber is an anaesthetic apparatus tailored specifically to meet the needs of horses.
• The design has a uniform internal diameter of 6.2 cm for every breathing component, maintaining a constant cross-sectional area.
• The system also boasts a large soda lime capacity of 25 liters (approximately 20 kg), which is a feature implemented to maximize the elimination of carbon dioxide.

Addressing Horse-Specific Inhalation Challenges

• The study highlights a peculiar challenge in delivering inhalation anaesthesia to horses: they are predisposed to alveolar hypoventilation. This condition refers to inadequate ventilation of the air sacs (alveoli) in the lungs, which can adversely affect gas exchange during inhalation anaesthesia.
• By ensuring minimal resistance and dead space in the anesthetic apparatus, the ‘Turner’ system aims to overcome this physiology-related limitation.

Focus on Efficient Carbon Dioxide Elimination

• Carbon dioxide elimination is crucial during anaesthesia to prevent a buildup of this waste gas in the patient’s system, which can lead to harmful effects.
• The large soda lime capacity of the ‘Turner’ system is used to absorb carbon dioxide, thus ensuring its efficient elimination during the process of inhalation anaesthesia.

By addressing these specific needs, the ‘Turner’ circle absorber presents a solution tailored to delivering effective inhalation anaesthesia to horses, addressing the unique physiological challenges they present.