Maximum oxygen concentration can be delivered by?
Choice D: Reservoir face mask is a high flow, variable performance device. At flow rate of 12-15L/min the delivered Fi02 is in the range of 75-90%. Choice C is simple face mask while choice B is Nasal cannula and both can deliver limited oxygen up to 40% due to diffusion and mixing with air. Choice A: Venturi mask is a high flow, fixed performance device. It can deliver up to 60% oxygen.
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Flow Volume curve, Spirometry and DLCO