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Changes to Step #8

Edit by Guy Kuo —

Edit approved by Guy Kuo

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[title] Expiratory Flutter Valves
[* red] Expiratory flow is through one way flutter valves. These screw onto the loop and create an airtight, penetration through the bag.
[* black] Flutter valves are fashioned from a cut-off glove finger rubber banded onto Flutter Valve Penetrator. End of finger is cut to allow air exit, but stop negative pressurereverse inflow.
[* green] A clip-onicon_note] Older, round flutter valve fittings also required addition of a valve deflector bendspiece to pre-bend the glove finger at base to improve valve performancefinger.
[* icon_noteicon_reminder] Bunny PAPR with correct inflow rate maintains continuous positive pressure. The flutter valves should rarely if ever need to close.
[* icon_caution] Test that your airflow and expiratory fittings configuration maintains positive pressurebag inflated even during inspiration The bag should remain pressurized during inspiration.
[* icon_caution] NEVER modify design to stent bag open. Bag must readily collapse. Bag collapsibility is additional safety feature against negative pressure developmentonly collapse inward about 1 cm.
[* black] Flutter valves are fashioned from a cut-off glove finger rubber banded onto Flutter Valve Penetrator. End of finger is cut to allow air exit, but stop negative pressurereverse inflow.
[* green] A clip-onicon_note] Older, round flutter valve fittings also required addition of a valve deflector bendspiece to pre-bend the glove finger at base to improve valve performancefinger.
[* icon_noteicon_reminder] Bunny PAPR with correct inflow rate maintains continuous positive pressure. The flutter valves should rarely if ever need to close.
[* icon_caution] Test that your airflow and expiratory fittings configuration maintains positive pressurebag inflated even during inspiration The bag should remain pressurized during inspiration.
[* icon_caution] NEVER modify design to stent bag open. Bag must readily collapse. Bag collapsibility is additional safety feature against negative pressure developmentonly collapse inward about 1 cm.

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