Optimization of cranial nerve stimulation to treat seizure disorderse during sleep

• US 9,056,195 B2
• Filed: 03/15/2013
• Issued: 06/16/2015
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: LivaNova USA, Inc. (LivaNova Plc)
• Original Assignee: Cyberonics, Inc
• Inventors: Sabesan, Shivkumar
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): PIATESKI, ERIN M
• Application Number:
  US13/834,523
• Publication Number:
  US 20140277255A1
• Time in Patent Office: 823 Days
• Field of Search: 607/45
• US Class Current: 1/1
• CPC Class Codes: A61N 1/0529 Electrodes for brain stimulation
• CPC Class Codes: A61N 1/36064 Epilepsy
• CPC Class Codes: A61N 1/36139 with automatic adjustment

Abstract

A method includes determining sleep cycle information related to a sleep cycle of a patient based on body parameter data. The method also includes adjusting a cranial nerve stimulation parameter based on the sleep cycle information.

Claims

1. A method comprising:

receiving, at a computing device, body parameter data of a patient;

retermining that the patient is in a particular preselected sleep cycle stage based on the body parameter data;

detecting, while the patient is in the particular sleep cycle stage, a seizure event based on synchrony of brain waves of the patient; and

adjusting, at the computing device, a cranial nerve stimulation parameter to substantially confirm the brain waves of the patient to a target synchrony profile associated with the particular sleep cycle stage.

2. The method of claim 1, wherein the body parameter data comprises electroencephalography (EEG) data, electrooculography (EOG) data, electromyography (EMG) data, electrocardiography (ECG) data, accelerometer data, or a combination thereof.

3. The method of claim 1, wherein the particular sleep cycle stage is determined further based on a sleep stage transition, an amount of time the patient spends in one or more stages during the particular sleep cycle, an amount of time the patient spends in one or more stages during a sleep period that includes multiple sleep cycles, or a combination thereof.

4. The method of claim 1,

wherein the body parameter data is received from a sensor that is attached to the patient.

5. The method of claim 1, further comprising readjusting the cranial nerve stimulation parameter in association with a first transition from a light sleep stage to an awake state;

a second transition from stage 1 sleep to stage 2 sleep;

the patient being in the light sleep stage;

the patient being in the light sleep stage for a particular amount of time;

or a combination thereof.

6. The method of claim 5, further comprising stimulating a cranial nerve based on the readjusted cranial nerve stimulation parameter to drive the patient toward a deep sleep stage.

7. The method of claim 1, further comprising applying stimulation signals to a vagus nerve or a trigeminal nerve of the patient via a therapy delivery unit based on the adjusted cranial nerve stimulation parameter.

8. The method of claim 1, wherein the cranial nerve stimulation parameter indicates a pulse width, an output current, a cranial nerve stimulation frequency, a cranial nerve stimulation duty cycle, a particular nerve or nerves stimulated, a cranial nerve stimulation frequency sweep, a cranial nerve stimulation on-time, a cranial nerve stimulation off-time, or a combination thereof.

9. The method of claim 1, wherein the seizure event corresponds to an epileptic seizure.