How do you set up the partial rebreather mask?

To set up a partial rebreather mask, first ensure that the mask is clean and free from defects. Connect the mask to an oxygen supply source, typically via a flowmeter, and set the oxygen flow rate to the prescribed level (usually between 6 to 10 liters per minute). Position the mask over the patient's nose and mouth, adjusting the straps for a snug fit to minimize leaks. Finally, check the reservoir bag to ensure it is inflated before use, indicating proper oxygen flow.