What term describes fittings that ensure gas is delivered as designated in medical systems?

The term that describes fittings ensuring gas is delivered as designated in medical systems is check fitting. Check fittings are specifically designed to prevent the backflow of gases, ensuring that the gas delivered to medical devices is not contaminated by any reverse flow from the system. This is crucial for maintaining the integrity and safety of medical gas supply, especially in healthcare settings where purity and correct delivery of gases like oxygen, nitrous oxide, and others are vital for patient care.

In the context of a medical gas installation, check fittings serve to prevent unintended gas migration back into the system, thereby maintaining the designated flow path and ensuring that the medical gases function correctly as per the design specifications. This is essential for both safety and effectiveness in delivering therapies.

Other options like regulators, demand valves, and adapters serve different functions in gas delivery systems. Regulators control the pressure of the gas, demand valves allow for gas to be delivered only when needed, and adapters facilitate connections between different types of fittings. While all these components are important in the overall system, the fitting that plays the critical role of ensuring the directed and safe delivery of gas, without the risk of backflow, is indeed the check fitting.