When checking an oxygen delivery system that incorporates a bubble humidifier running at 6 L/min, you occlude the delivery tubing, and the humidifier pressure relief immediately pops off. What does this indicate?

Question

Quizplus · Accepted Answer

The pressure relief popping off indicates that the system is working properly and is leak-free. When the delivery tubing is occluded, the pressure builds up and the pressure relief valve opens to prevent any damage to the system. This is a normal safety feature of the system. A malfunctioning humidifier would not cause the pressure relief valve to pop off, and a malfunctioning flowmeter or a leak in the delivery tubing would cause a decrease in pressure rather than an increase.

When Checking an Oxygen Delivery System That Incorporates a Bubble