What is the primary function of a hanger yoke in an anesthesia machine?

• A. It serves as a gas flow regulator
• B. It allows gas cylinders to attach securely
• C. It filters impurities from the gases
• D. It measures the gas pressure

Answer: (B)

The primary function of a hanger yoke in an anesthesia machine is to securely attach gas cylinders to the machine. The hanger yoke provides a physical connection that not only holds the gas cylinder in place but also aligns the cylinder’s pin configuration with the machine’s yoke system, preventing incorrect gas connections. This design ensures that the correct type of gas can be used safely and prevents leaks or mix-ups between different gases.

While gas flow regulation, filtration of impurities, and pressure measurement are important aspects of anesthesia machines, these functions are handled by other components in the system. The hanger yoke's main purpose is to ensure the safe and secure attachment of the gas cylinder, which is critical for the proper functioning of the anesthesia machine.