Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1995-06-07
1996-07-16
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820421, 12820718, 128716, 128725, A61M 1600
Patent
active
055357393
ABSTRACT:
In the treatment of obstructive sleep apnea a method and apparatus are disclosed for optimizing the controlled positive pressure to minimize the flow of air from a flow generator while still ensuring that flow limitation in the patient's airway does not occur. In particular, the invention relates to a breathing device and method of use to adjust a controlled positive pressure to the airway of a patient by detecting flow limitation from analysis of an inspiratory flow waveform. Once the presence of flow limitation has been analyzed, the system determines an action to take for adjustment of the controlled positive pressure. The pressure setting is raised, lowered or maintained depending on whether flow limitation has been detected and on the previous actions taken by the system. The preferred breathing apparatus consists of a flow generator, a flow sensor, an analog to digital converter, a microprocessor, and a pressure controller, a patient supply hose, a nasal fitting, and, optionally, a pressure transducer. Using the method of the present invention, the microprocessor adjusts the air pressure in the patient supply hose when flow limitation is detected in the airway of the patient.
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Gruenke Roger A.
Norman Robert G.
Rapoport David M.
Burr Edgar S.
Nellcor Puritan Bennett
New York University
Patton Fulwider
Raciti Eric P.
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