What step should you take after attaching the regulator to the oxygen cylinder for a nonrebreather mask?

After attaching the regulator to the oxygen cylinder, the next step involves turning the valve stem on the top of the cylinder to release the oxygen. This action is crucial because it allows oxygen to flow into the system and ensures that the regulator is functioning correctly. By opening the valve, you make it possible to determine if the oxygen system is operational and provides a supply of oxygen suitable for use.

Additionally, this step is important for establishing a safe and effective delivery of oxygen to the patient once additional preparations are complete. Properly managing oxygen flow is essential in emergency situations, as it directly impacts the patient’s ability to receive the necessary respiratory support.

While checking for leaks, setting the flow rate, and connecting the mask to the patient are important aspects of the procedure, they come after confirming that the oxygen supply is functioning properly by opening the valve stem.