When initiating oxygen per mask to a client who is short of breath, the nurse hears a loud hissing sound after inserting the flowmeter into the wall outlet. Which should the nurse do next?

A. Adjust the flow rate to the prescribed liters per minute is not the first action to take. The loud hissing sound indicates a potential issue with the connection of the flowmeter, so the nurse should first address that before adjusting the flow rate. B. Assess the position of the mask on the client's face is important, but the loud hissing sound suggests a problem with the oxygen delivery system rather than with the mask itself. The nurse should check the flowmeter connection first. C. Attach the flowmeter to a humidification canister is unnecessary unless the prescription specifically includes humidification. The priority is to ensure the flowmeter is properly inserted into the wall outlet and the oxygen system is functioning correctly. D. Release and reinsert the flowmeter in the wall outlet is the correct action. The loud hissing sound may be caused by an improper or loose connection between the flowmeter and the wall outlet. The nurse should ensure the flowmeter is securely attached to prevent leakage and ensure proper oxygen delivery.