Sleep apnea treatment apparatus

• US 6,427,689 B1
• Filed: 05/04/1993
• Issued: 08/06/2002
• 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): Lewis, Aaron J.
• Application Number:
  US08/057,622
• Time in Patent Office: 3,381 Days
• Field of Search: 128/204.18, 128/204.21, 128/204.22, 128/204.23, 128/204.26
• US Class Current: 128/204.18
• 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 treatment of sleep apnea through (1) application of alternating high and low level positive airway pressure within the airway of the patient with the high and low airway pressure being coordinated with 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, and (3) remote control operation of the apparatus for assisting those patients whose mobility or capacity for physical exertion is intrinsically limited.

Claims

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

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

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

pressure controller means cooperable with said gas flow generator means to provide for flow of said pressurized gas within said conduit means and within the airway of the patient at selectively variable, continuously administered positive airway pressure levels, during inhalation and exhalation of the patient; and

ramp control circuitry means operatively connected to said pressure controller means for effecting (1) a first ramp cycle wherein said pressurized gas flow from said pressure controller means is initially output at a first continuously administered positive airway pressure level and raises with time to a second continuously administered positive airway pressure level, said first ramp cycle extending over multiple patient breathing cycles, and (2) at least one additional ramp cycle for selective activation, wherein said at least one additional ramp cycle comprises gas flow from said pressure controller means being initially output at said first continuously administered positive airway pressure level and raising with time to said second continuously administered positive airway pressure level, said at least one additional ramp cycle extending over multiple patient breathing cycles.

2. The apparatus of claim 1 further comprising means associated with said ramp control circuitry means for adjusting the magnitude of said first pressure.

3. The apparatus of claim 1 further comprising means associated with said ramp control circuitry means for adjusting the magnitude of said second pressure.

4. The apparatus of claim 3 wherein said second pressure is a prescription pressure unique to said patient.

5. The apparatus of claim 1 further comprising means associated with said ramp control circuitry means for adjusting the duration of said at least one additional ramp cycle.

6. The apparatus of claim 5 wherein said means for adjusting the duration of said at least one additional ramp cycle permits adjustment of the duration of said at least one additional ramp cycle from substantially zero up to and including the duration of said first ramp cycle.

7. The apparatus of claim 1 further comprising means associated with said ramp control circuitry means for establishing a predetermined pattern of pressure output from said pressure controller means as said pressure progresses from said first pressure to said second pressure.

8. The apparatus of claim 1 further comprising means associated with said ramp control circuitry means for establishing a pattern of pressure output from said pressure controller means different than said predetermined pattern during said at least one additional ramp cycle.

9. The apparatus of claim 1 further comprising remote control means operable by a user selectively activating said apparatus and said ramp control circuitry means.

10. The apparatus of claim 9 wherein said remote control means includes a first actuator having a first configuration and adapted to be operated by said user to activate said apparatus.

11. The apparatus of claim 10 wherein said remote control means further includes a second actuator having a second configuration substantially different than said first configuration and adapted to activate said ramp control circuitry means, whereby said user can reliably identify and operate said first and second actuators by sense of touch.