Letter
Oxygen delivery: Nasopharyngeal catheter or nasal prongs?

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To the Editor:

Weber et al.1 studied young children in The Gambia who had hypoxemia caused by acute lower respiratory tract infection. They compared the flow of oxygen needed to increase the pulse oximeter oxygen saturation (SpO2) to 95%, using either a nasopharyngeal catheter or nasal prongs. It is important to compare the inspired oxygen concentration delivered by these two routes of administration, but the methods used in this study do not afford a reliable comparison.

Because of the shape of the

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