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Anaesthesia General d604c033

At a flow rate of 3L/min, inspiratory (FUO2) concentration of 30–60% can be achieved by using a –

A
Nasopharyngeal catheter
B
Simple face mask
C
Venturi mask
D
Head box
High-Yield Explanation
Nasopharyngeal catheter deliver 32% of O2 (FiO2 → 0.32) at flow-rate 3 litre / minute.

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