Which one of the following safety systems is often used for smaller gas cylinders?

The safety system primarily used for smaller gas cylinders is the PISS, which stands for Pin-Indexed Safety System. This system is specifically designed to prevent the incorrect connection of medical gas cylinders. Each type of gas cylinder has a unique pin configuration that corresponds with specific gas types, ensuring that only the appropriate equipment can be attached to it.

For instance, if a cylinder contains oxygen, it will have a different pin layout than a cylinder containing nitrous oxide. This design significantly reduces the risk of administering the wrong type of gas, which can pose serious safety hazards to patients. The PISS is particularly effective for smaller cylinders that are commonly used in medical settings for transporting gases and delivering them directly to patients.

In contrast, other systems like ASSS (American Standard Safety System) are used for larger cylinders, while DISS (Diameter-Indexed Safety System) is utilized for connections to piping systems, and quick connect systems are designed for ease of connection without manipulation of threads. Each of these systems serves different applications in the management of medical gases, emphasizing the importance of using the correct system for the appropriate gas cylinder size.