Oxygen FAQ

Up to date, expert answers to frequently asked questions (FAQ) about oxygen supply systems, respiratory care and pulse oximetry written by OCC & collaborators.

What is ‘Boussignac CPAP’?

  • Boussignac is a low cost, easy to use facemask CPAP-like system that has no sensors, mechanical valves or electrical components. The system connects to an oxygen flowmeter/source that generates flow dependent pressure (8LPM ~3cmH20; 15LPM ~5cmH20; 23LPM ~10cmH20)  
  • Traditionally used by prehospital providers for cardiogenic pulmonary edema
  • In patients with hypoxemic respiratory failure (non cardiogenic pulmonary edema), it is unclear if this device would work well in patients with high minute ventilation (Sehlin et al, Resp Care, June 2011). 
  • There are several noteworthy potential limitations:
    • Utilizes high oxygen flows
    • Limited ability to adjust FiO2
    • At high flows will cause airway dryness and discomfort.
    • No leak compensation 
    • No monitoring of pressures

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