Method and apparatus for apnea patient screening

• US 5,233,983 A
• Filed: 09/03/1991
• Issued: 08/10/1993
• Est. Priority Date: 09/03/1991
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Markowitz, H. Toby
• Primary Examiner(s): Howell, Kyle L.
• Assistant Examiner(s): MANUEL, GEORGE C
• Application Number:
  US07/754,407
• Time in Patent Office: 707 Days
• Field of Search: 128/419 G, 128/419 R, 128/419 C, 128/420 A, 128/420 R, 128/421, 128/422, 128/786, 128/721, 128/905, 128/716, 128/720, 128/670, 128/671
• US Class Current: 607/42
• CPC Class Codes: A61N 1/3601 of respiratory organs

Abstract

An apparatus for and method of preoperative and intraoperative screening of obstructive sleep apnea patients. The screening device employs a plurality of stimulation channels which may be individually controlled to terminate or prevent an apnea event. The apparatus also contains a plurality of sensor processing channels to permit selection of the optimal sensor configuration and the sensing parameters. The preoperative procedure determines the suitability of a patient for therapy using an automatic implantable system. The type and placement of sensors and stimulation electrodes is also determined. During the intraoperative procedure, the initial screening determinations are verified and the various sensing and stimulation parameters are optimized.

Claims

1. An apparatus for screening obstructive sleep apnea patients comprising:

a. a housing;

b. means located within said housing for processing signals from a plurality of sensors adapted to monitor a plurality of different physiological parameters;

c. means located within said housing and coupled to said processing means for determining detection of an apnea event from a one of said plurality of sensors;

d. means located within said housing for generating a muscle stimulating signal; and

e. means located within said housing and coupled to said determining means and said generating means for causing said generating means to be initiated by determination of detection of said apnea event.

2. An apparatus according to claim 1 wherein said processing means further comprises a variable gain amplifier for each of said plurality of sensors.

3. An apparatus according to claim 2 wherein said processing means further comprises a variable threshold adjustment for each of said plurality of sensors.

4. An apparatus according to claim 3 wherein said processing means further comprises a visual event indicator for each of said plurality of sensors.

5. An apparatus according to claim 4 wherein said processing means further comprises a CRT display for displaying each of said plurality of sensors.

6. An apparatus according to claim 1, 2, 3, 4, and 5 wherein said generating means further comprises a plurality of individually controlled output channels.

7. An apparatus according to claim 6 wherein each of said plurality of separately controlled output channels further comprises means for adjusting initial and final pulse width.

8. An apparatus according to claim 7 wherein each of said plurality of separately controlled output channels further comprises means for controlling pulse interval.

9. An apparatus according to claim 8 wherein each of said plurality of separately controlled output channels further comprises means for controlling duty cycle.

10. An apparatus according to claim 9 wherein each of said plurality of separately controlled output channels further comprises means for adjusting initial and final amplitude.

11. A method of screening apnea patients comprising:

a. simultaneously measuring a plurality of sensors for detection of an apnea event;

b. testing a plurality of electrodes for termination of an apnea event;

c. optimizing parameters associated with processing of signals from said plurality of sensors; and

d. optimizing parameters associated with stimulation at said plurality of electrodes for termination of said apnea event.