Respiratory therapy apparatus
AssigneeSmiths Medical International Limited
InventorFredrick M Richards
Life of this patent
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Abstract
A respiratory therapy apparatus includes a rocker mechanism (101, 110, 111, 112) that provides an oscillating resistance to expiration. The apparatus also includes an air entrainment arrangement (200) at its air inlet (3) having a ring orifice (214) connected via a gas inlet (4) to a source (119) of oxygen at elevated pressure. The oxygen emerging around the ring orifice (214) entrains ambient air and supplies this as a continuous flow of respiratory gas to the patient interface (2) to provide a positive airway pressure.
Claims7
1-6. (canceled)
Respiratory therapy apparatus including a respiratory therapy device of the kind having a patient interface and a mechanism arranged to produce an oscillating resistance to expiratory flow through the device, characterised in that the therapy apparatus additionally includes an arrangement for generating a continuous flow of inspiratory respiratory gas to the patient, that the arrangement includes a gas inlet arranged to receive a supply of respiratory gas at elevated pressure, and that the arrangement provides a positive airway pressure to the patient interface.
Dependencies are inferred from the claim text.