The oxygen flush valve draws from the intermediate pressure system, which operates at approximately which pressure?

The oxygen flush valve draws from the intermediate pressure system, which operates at approximately which pressure?

• A. 200 psi
• B. 60 psi
• C. 50 psi
• D. 10 psi

Answer: (C)

The oxygen flush valve pulls gas from the intermediate pressure system, which is kept at a moderate, stable pressure to feed the downstream components of the anesthesia machine. This stage is after the high-pressure cylinder or pipeline regulators and before the flowmeters and vaporizers, and it’s designed to be around 50 psi. Keeping IPS near 50 psi allows the flush valve to deliver a high flow of oxygen into the breathing circuit quickly without surging or damaging components. Pressures much higher, like 200 psi, would risk harm to the circuit, while too low a pressure, such as 10 psi, wouldn’t provide an effective flush. A value around 60 psi is not the standard target, whereas about 50 psi is the typical IPS pressure.

The oxygen flush valve pulls gas from the intermediate pressure system, which is kept at a moderate, stable pressure to feed the downstream components of the anesthesia machine. This stage is after the high-pressure cylinder or pipeline regulators and before the flowmeters and vaporizers, and it’s designed to be around 50 psi. Keeping IPS near 50 psi allows the flush valve to deliver a high flow of oxygen into the breathing circuit quickly without surging or damaging components. Pressures much higher, like 200 psi, would risk harm to the circuit, while too low a pressure, such as 10 psi, wouldn’t provide an effective flush. A value around 60 psi is not the standard target, whereas about 50 psi is the typical IPS pressure.