Sleep apnea treatment apparatus with reset circuitry

• US 5,551,418 A
• Filed: 08/23/1993
• Issued: 09/03/1996
• Est. Priority Date: 11/01/1991
• Status: Expired due to Term

• Current Assignee: RIC INVESTMENTS LLC (Respironics Incorporated)
• Original Assignee: Respironics Incorporated
• Inventors: Estes, Mark C., Cattano, Janice M.
• Primary Examiner(s): Asher, Kimberly L.
• Application Number:
  US08/110,372
• Time in Patent Office: 1,107 Days
• Field of Search: 128/204.18, 128/204.21-204.23, 128/204.26
• US Class Current: 128/204.23
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/204 used for inhalation control
• CPC Class Codes: A61M 16/205 used for exhalation control
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/3561 local, e.g. within room or hospital
• CPC Class Codes: A61M 2230/60 Muscle strain, i.e. measured on the user

Abstract

Improved methodology and apparatus for the clinical study and treatment of sleep apnea which incorporates one or more of the following features: (1) application of mono-level, alternating high and low level, or variable positive airway pressure generally within the airway of the patient with the mono-level, high and low level, or variable airway pressure generally being coordinated with and/or responsive to the spontaneous respiration of the patient, (2) usage of adjustably programmable pressure ramp circuitry capable of producing multiple pressure ramp cycles of predetermined duration and pattern whereby the ramp cycles may be customized to accommodate the specific needs of an individual sleep apnea patient so as to ease the patient'"'"'s transition from wakefulness to sleep, (3) remote control or patient-sensed operation of the apparatus, (4) employment of safety circuitry, reset circuitry and minimum system leak assurance circuitry, controls and methods, and (5) utilization of clinical control circuitry whereby sleep disorder data may be compiled and appropriate therapy implemented during a one-night sleep study.

Claims

1. Apparatus for delivering pressurized gas to the airway of a patent, said apparatus comprising;

gas flow generator means for providing a flow of said gas;

conduit means for delivery of said gas flow to the airway of said patient;

pressure controller means cooperable with said gas flow generator means to provide for flow of said gas within said conduit means and within the airway of said patient at at least one pressure level; and

reset circuit means for permitting said patient to substantially instantaneously reset said pressure controller means to provide said flow of gas at a predetermined reduced pressure after which said pressure controller means resumes provision of said flow of gas in a manner substantially similar to that provided prior to said reset.

2. The apparatus of claim 1 wherein said apparatus is a mono-level positive airway pressure apparatus.

3. The apparatus of claim 1 wherein said apparatus is a bi-level positive airway pressure apparatus.

4. The apparatus of claim 1 wherein said apparatus is a variable level positive airway pressure apparatus.

5. The apparatus of claim 1 further comprising feedback circuit means for controlling said gas flow generator means responsive to detection of a condition associated with said patient.

6. The apparatus of claim 1 wherein said apparatus further comprises means for actuating said reset circuit to effect said reset.

7. The apparatus of claim 1 further comprising system data storage and retrieval means for compiling data associated with physiological parameters of said patient.