Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1995-11-06
1999-02-02
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820421, 12820426, A61M 1600, A62B 704, F16K 3102, F16K 3126
Patent
active
058651730
ABSTRACT:
A bilevel continuous positive airway pressure (CPAP) respiratory therapy system which applies a prescribed inspiratory positive airway pressure (IPAP) to a patient's respiratory system during inhalation and applies a lower prescribed expiratory positive airway pressure (EPAP) to the respiratory system during exhalation. A blower provides pressurized air at least at the IPAP pressure. A fast response vent valve reduces the pressure applied to the patient to the EPAP level during exhalation and increases the pressure to the set IPAP level during inhalation. Leading edges of pressure changes between the IPAP and EPAP levels are rounded by an adjustable amount to enhance patient comfort and/or to allow the physician to modify the therapy. In an alternate embodiment, the pressure is controlled by controlling the speed of the blower.
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Asher Kimberly L.
Sunrise Medical HHG Inc.
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