Thanks for this. Here's a way to think of it from a patient's point of view. I'm a patient on 24/7 O2 therapy. The flow rate on my concentrator is set at 3 lpm. The cannula is delivering 3 lpm to my nose. If I inhale only through my nose, I'm getting 3 lpm of O2. However, I usually inhale through my nose some of the time and through my mouth some of the time. So there's a pretty random mix of air and O2 reaching my lungs. If I wear a mask (ALWAYS an uncomfortable experience), the mixing of air and O2 is controlled by the venturi and is much more predictable. By the way, if anyone makes a mask that is comfortable I'd like to know about it. I know these things are considered disposable, but patients would appreciate their comfort being considered.

Best explanation I've ever heard!!

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تخبلين فدوه لالله

Thank you! Can you explain why a Non-Rebreather is considered low flow and not high flow?