Carbon dioxide-based Bi-level CPAP control

Details Carbon dioxide-based Bi-level CPAP control Carbon dioxide-based Bi-level CPAP control

2006-01-31

2006-01-31

Dawson, Glenn K. (Department: 3731)

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

C128S204180, C128S204230, C128S205110

Reexamination Certificate

active

06990980

ABSTRACT:
A system and method of providing bi-level CPAP therapy is provided that incorporates an infrared carbon-dioxide sensor to determine whether a patient is inhaling or exhaling. Patient exhalation causes the infrared light to be absorbed, while patient inhalation reduces the presence of carbon-dioxide causes little or no absorption of carbon-dioxide. The level of carbon-dioxide in an associated patient breathing interface is monitored for thresholds that trigger higher CPAP pressure upon inhalation and lower CPAP pressure upon exhalation.

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