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Using a Neopuff Infant Resuscitator (Fisher & Paykel Healthcare, Auckland, New Zealand), Hawkes et al1 showed that a peak inflating pressure (PIP) >100 cm H2O can be delivered with a flow meter at maximum flow. We tested five flow meters to determine the pressures delivered at different flow rates.
Gas flow was analysed using the Timeter RT-200 Flow Analyser (Timeter-Instruments, St Louis, Missouri, USA). Each flow meter was tested connected to a wall oxygen outlet or a low-flow air/oxygen blender (Cardinal Health, Ohio, USA).
Positive pressure ventilation was given to a leak-free test lung using a Neopuff. Neopuff set to PIP 20 cm H2O, …
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