Which system prevents attachment of gas-administering equipment to the wrong type of gas line?

Which system prevents attachment of gas-administering equipment to the wrong type of gas line?

• A. Pin-index safety system
• B. Diameter-index safety system
• C. Fail-safe system
• D. Proportion-limiting control system

Answer: (B)

Preventing misconnections between gas-delivery equipment and the wall gas outlets is achieved by the Diameter-Index Safety System. This system uses unique diameters and threading for each gas outlet, so you can’t attach an anesthesia device to the wrong gas line—the connectors are physically non-interchangeable. That means a device designed for oxygen can’t be connected to a nitrous oxide or air outlet, and so on. This differs from the pin-index safety system, which guards against connecting gas cylinders to the wrong yoke on the machine, not the wall outlets. The fail-safe system is about ensuring oxygen concentration remains above a safe level and triggers alarms when needed, while the proportion-limiting control system governs the maximum amount of anesthetic agent delivered.

Preventing misconnections between gas-delivery equipment and the wall gas outlets is achieved by the Diameter-Index Safety System. This system uses unique diameters and threading for each gas outlet, so you can’t attach an anesthesia device to the wrong gas line—the connectors are physically non-interchangeable. That means a device designed for oxygen can’t be connected to a nitrous oxide or air outlet, and so on.

This differs from the pin-index safety system, which guards against connecting gas cylinders to the wrong yoke on the machine, not the wall outlets. The fail-safe system is about ensuring oxygen concentration remains above a safe level and triggers alarms when needed, while the proportion-limiting control system governs the maximum amount of anesthetic agent delivered.