Which of the following can deliver 90% oxygen?
Non rebreathing masks: Can deliver upto 80% of oxygen. Rebreathing mask: When tightly fit, they can provide 100%oxygen.(Refer: Morgan's Clinical Anaesthesiology, 4th edition, pg no: 38-40)
Venturi mask
Rebreathing O2 mask
Nasal prongs
Non-rebreathing mask with O2reservoir bag
All India exam