oxygen delivery with nasal cannula

[Fiioonnaa]

According to all the sources it is allowed to give oxygen with nasal cannula from 1 to 6 liters per minute, not more, to avoid damaging of the mucosa, and if you deliver oxygen generally at a rate more than 4 liters per minute you are supposed to humidify to avoid dryness of the mucosa. so my question is why it is not allowed to give oxygen with a nasal canulla at a rate more than 6 liters per minute if it is humidified?

[heinz57]

To add to the already correct answers being given, I've seen the plastic prefilled bubblers pop/explode with high flow running through them. Know what manufacturer's recommend and don't exceed those recommendations.

Those plastic bubblers can be used with a High Flow Nasal Cannula which have a slightly larger tubing bore. It is often a different color like green to differentiate it from a standard cannula. It is capable of flows up to 15 L/m. The OxyMask can also be ran off that little plastic bubbler at flows of 15 L/m. However, the standard nasal cannula (at >6 L/m), Simple Mask (regardless of flow) and nonrebreather should not be used with the plastic bubbler.