Medictests.com Quick and Dirty Guide to FiO2% and Liter Flow
Nasal Cannula Approximations : Rule of thumb 4% FiO2 for each liter
1L : 24%
2L: 28%
3L: 32%
4L: 36%
5L: 40%
6L: 44%
Simple masks, Trach masks
deliver FiO2 of 40-50% with a minimum liter flow of 5-12 LPM. Do not use a simple mask with liter flow at lower than 5LPM because you need the pressure to be high enough to flush the CO2 out of the mask.
Nonrebreather masks
deliver FiO2 of 60-100% and you can titrate O2 to the patient’s inspiratory needs… ie. the bag should not deflate completely on inspiration.
Tools, Videos and links!
This video is the best one I’ve found on the internet in explaining the different FiO2′s for infants, peds and adults in various circumstances!
Awesome Slideshow presentation with lots of great information on oxygen application systems