Which component connects the supply hose to the anesthesia machine?

• A. Pressure regulator
• B. DISS fitting
• C. Check valve
• D. O2 analyzer

Answer: (B)

The DISS fitting is designed specifically to connect the supply hose to the anesthesia machine. It serves an important safety function by ensuring that medical gases can only be connected to the correct outlets, thereby preventing the risk of misconnection between different gas supplies. DISS stands for Diameter Index Safety System, and it is a standardized fitting that uses different sizes and thread configurations to make improper connections virtually impossible.

This design emphasizes safety and prevents the introduction of incorrect gases into the anesthesia machine, which is crucial for patient safety during anesthesia delivery. The other components mentioned, while important in their respective roles within the anesthesia machine, do not serve the primary purpose of connecting the supply hose. For example, the pressure regulator manages the gas pressure, the check valve prevents backflow, and the O2 analyzer monitors the concentration of oxygen, but none of these components function as the interface that physically connects the gas supply hose to the machine itself.