YMCA Basic Life Support Practice Test 2025 – Complete Exam Prep

The regulator is the component of a medical oxygen delivery system responsible for controlling the flow of oxygen from the supply cylinder to the patient. Its function is essential because oxygen cylinders contain gas at high pressure, and the regulator reduces this pressure to a safe level that is suitable for administration to patients. Additionally, the regulator typically has a flow meter that allows precise measurement and adjustment of the flow rate of oxygen being delivered, which can be critical for meeting the specific needs of the patient.

The adapter port, while important for connecting different parts of the system, does not control the flow of oxygen. The delivery device, such as a mask or nasal cannula, is responsible for administering the oxygen to the patient but does not regulate how much oxygen is delivered. Supply tubing acts as a conduit for transporting oxygen from the regulator to the delivery device and does not influence the flow rate either. Each component plays a role, but the regulator is the key element in establishing and adjusting the oxygen flow.