The regulator on the cylinder serves what primary purpose?

The primary purpose of the regulator on a gas cylinder is to reduce high variable pressure to a constant level. Cylinders containing medical gases are typically stored at very high pressures, which can be dangerous if not properly managed. The regulator is designed to control this pressure, allowing it to be safely delivered at a specific, lower pressure suitable for clinical use.

By ensuring that the pressure is maintained at a constant and safe level, the regulator facilitates consistent gas flow to the anesthesia machine or other medical devices that require specific operating pressures. This is crucial for both the safety of the patient and the effectiveness of the medical gas being administered.