Changes to Step #28
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| [title] Inflow/Outflow Balance: Maintain Positive Pressure |
| [* black] Fan power is limiting factor for HALO fan PAPR configuration. There must be sufficient flow to maintain positive pressure during inspiration. Also CO2 clearance must be adequate. |
| [* icon_note] NEW: 51 mm blower fan has been found far superior to 60 mm tubaxial fan. I recommend blower fan and single viral filter. |
| [* 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 pressure even during inspiration. |
| [* black] Greater fan power and/or reduced filter airflow resistance improve airflow and increase HALO's positive pressure safety barrier. |
| [* black] The twin filter intake flange for 60 mm fans can improve airflow adequacy when higher power fans are not available. However, I strongly recommend using a better, blower style fan. |
| [* black] The twin filter intake flange for 60 mm fans can improve airflow adequacy when higher power fans are not available. However, I strongly recommend using a better, blower style fan. |
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