초록 ▼

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 syst

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.

대표청구항 ▼

[ I claim:] [1.] A continuous positive airway pressure system for respiratory therapy including a blower for establishing a flow of pressurized air, a hose adapted to deliver the pressurized air flow to a patient's respiratory system, means adapted to control the pressure of air delivered to the pat

[ I claim:] [1.] A continuous positive airway pressure system for respiratory therapy including a blower for establishing a flow of pressurized air, a hose adapted to deliver the pressurized air flow to a patient's respiratory system, means adapted to control the pressure of air delivered to the patient, and a controller adapted to control said pressure control means to establish a prescribed IPAP level during patient inhalation and a prescribed EPAP level during patient exhalation, the improvement comprising means for changing the profile of leading edges of the applied pressure waveform as such waveform alternately changes between EPAP and IPAP levels.