Which action correctly describes attaching the nasal cannula to the flow meter?

• A. Attach the cannula tubing to the flow meter and adjust the oxygen flow to the physician's order.
• B. Check the order and then call EMS.
• C. Turn on the cylinder and place the cannula into the nostrils without attaching tubing.
• D. Attach the cannula tubing to the flow meter and adjust the oxygen flow to the physician's order.

Answer: (C)

Connecting the nasal cannula tubing to the flow meter and setting the oxygen flow to the physician’s order is how oxygen is delivered accurately. The flow meter controls the liters per minute, so attaching the cannula completes the delivery path. Turning on the cylinder by itself or inserting the cannula into the nostrils without tubing would not deliver oxygen to the patient and could waste gas or create confusion. After confirming the order, you attach the tubing, adjust to the prescribed flow, then place the cannula on the patient and check for comfort and a proper seal.