Final answer:
The nurse should use a flowmeter to regulate the amount of oxygen delivered to the client.
Step-by-step explanation:
The nurse should use a flowmeter to regulate the amount of oxygen delivered to the client.
A flowmeter is a device used to control and measure the rate of oxygen flow from the oxygen source to the client. It allows the nurse to adjust the flow rate according to the client's needs and desired oxygen saturation levels.
Other options provided in the question, such as a nasal strip, nasal cannula, and oxygen analyzer, are not used to regulate the amount of oxygen delivered but serve different purposes in oxygen therapy.