Final answer:
A flow meter is used to regulate the amount of oxygen delivered to a patient during oxygen administration, ensuring the correct flow rate is set as per the prescription.
Step-by-step explanation:
During oxygen administration to the client, the piece of equipment that enables the nurse to regulate the amount of oxygen delivered is the flow meter. A flow meter is specifically designed to control the flow rate of oxygen from the supply system to the patient. It is crucial in ensuring that the client receives the correct amount of oxygen as prescribed. Other equipment such as the nasal cannula is a device used to deliver oxygen, but it does not regulate flow. An oxygen analyzer measures the concentration of oxygen, especially in a mixture of gases. A humidifier moistens the oxygen before delivery, as dry oxygen can be irritating to the mucous membranes.