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Changes to Step #28

Edit by Guy Kuo —

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[title] Inflow/Outflow Balance: Maintain Positive Pressure
[* green] There must be sufficient flow to maintain positive pressure during inspiration. Also CO2 clearance must be adequate.
[* icon_note] 51I recommend a blower style fan and single viral filter. 51 mm blower fan hasfans have tested far superior to a 60 mm tubaxial fan. I recommend a blower style fan and single viral filterfans.
[* icon_note] 51I recommend a blower style fan and single viral filter. 51 mm blower fan hasfans have tested far superior to a 60 mm tubaxial fan. I recommend a blower style fan and single viral filterfans.
[* icon_reminder] Fan shall be oriented to pull air in through filter and vent into bag
[* icon_note] Bag is intentionally NOT stented open. We want the bag to readily collapse. This prevents development of negative pressure during inspiration.
[* icon_caution] Valves are never instantaneous. Configure your air intake and expiratory fittings to maintain positive to neutral pressure even during inspiration.
[* icon_caution] Do not massively increase fan power beyond the 51 mm blower fan I have testedpower. Keep total liters/min through putflow to about 20-30 L/min to remain well within anesthesia filter performance envelope.
[* icon_caution] Valves are never instantaneous. Configure your air intake and expiratory fittings to maintain positive to neutral pressure even during inspiration.
[* icon_caution] Do not massively increase fan power beyond the 51 mm blower fan I have testedpower. Keep total liters/min through putflow to about 20-30 L/min to remain well within anesthesia filter performance envelope.