Non-rebreathing mask-this is an almost complete rip-off of roses example, but i think it is a good one to go over. i want to think - max fio2 = 100%, the only problem is that 100% is not always practical (or possible) in situations like this where the patient is being transported. blender systems and non-rebreathing circuits require extra equipment and multiple connections and a bunch of stuff you dont want to mess with on the go. the nebulizer mask might work, but if the patient is not able to hold the the nebulizer bottle it might make for a sloppy, wet trip. at least thats the way i overheard rose explaining it.