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→Physical Characteristics of an Oxygen Bleed
1-PSI is 70 cm-H2O, so the oxygen concentrator flow is fully delivered to the CPAP circuit.
A typical oxygen bleed circuit delivers between 1-liter/minute (L/min) to 3-L/min.
The typical CPAP or Bilevel respiratory circuit flows 30 to 80 L/min of air volume in the absence of large leaks. (our example will assume 30 L/min). Higher CPAP flow rates will decrease the FiO2 for any oxygen flow rate. So the use of a full face mask with its higher leak rate, will require more oxygen bleed than a nasal mask at the same pressure to achieve the same results.
=What is the oxygen concentration in the diluted CPAP circuit?=
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