Integrated system for EEG monitoring and electrical stimulation with a multiplicity of electrodes

• US 6,230,049 B1
• Filed: 08/13/1999
• Issued: 05/08/2001
• Est. Priority Date: 08/13/1999
• Status: Expired due to Term

• Current Assignee: Neuropace Inc.
• Original Assignee: Neuropace Inc.
• Inventors: Fischell, David R., Fischell, Robert E.
• Primary Examiner(s): Nasser, Robert L.
• Application Number:
  US09/373,676
• Time in Patent Office: 634 Days
• Field of Search: 600/544, 600/545, 600/306
• US Class Current: 600/544
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/372 Analysis of electroencephalograms
• CPC Class Codes: A61B 5/4094 Diagnosing or monitoring seizure diseases, e.g. epilepsy
• CPC Class Codes: A61N 1/36017 with leads or electrodes penetrating the skin
• CPC Class Codes: A61N 1/36025 for treating a mental or cerebral condition
• CPC Class Codes: A61N 1/36082 Cognitive or psychiatric applications, e.g. dementia or Alzheimer's disease

Abstract

The disclosed invention is an integrated system for EEG monitoring and electrical stimulation from a multiplicity of scalp or intracranial implanted electrodes. The system integrates EEG monitoring and brain stimulation, supports remote electrode selection for stimulation and provides a wireless connection between the patient'"'"'s brain electrodes and the EEG analysis workstation used to collect EEG data, analyze EEG signals and control system functionality.

Claims

1. An integrated system for EEG monitoring and electrical stimulation, comprising:

a multiplicity of brain electrodes having conducting means to carry electrical signals to and from the multiplicity of brain electrodes;

an EEG analysis workstation having the capability to process, store and display EEG signals from the multiplicity of brain electrodes. The EEG analysis workstation also having the capability to initiate the electrical stimulation of a subset of the multiplicity of brain electrodes;

a workstation electronics module connected to the EEG analysis workstation, the workstation electronics module having the capability to provide wireless data communication capability for the EEG analysis workstation.

a patient electronics module comprising (1) an interface to the conducting means carrying the EEG signals from the multiplicity of brain electrodes, (2) a multiplicity of signal amplifiers having the capability to amplify the electrical signals carried by the conducting means from the multiplicity of brain electrodes, (3) a programmable electrical stimulator having the capability to generate electrical stimulation signals to be carried by the conducting means to a subset of the multiplicity of brain electrodes, and (4) wireless data communication means having the capability to send and receive data to and from the workstation electronics module.

2. The system of claim 1 wherein the EEG analysis workstation further comprises seizure detection means for identifying epileptiform activity from the brain electrodes.

3. The system of claim 2 wherein the EEG analysis workstation has the capability to automatically initiate electrical stimulation to the brain electrodes when epileptiform activity is detected by the seizure detection means.

4. The system of claim 2 wherein the seizure detection means comprises two or more detection algorithms that may be used concurrently to identify epileptiform activity.

5. The system of claim 1 wherein the patient electronics module further comprises an audio output jack for connecting an auditory stimulus device to the patient electronics module.

6. The system of claim 5 wherein the auditory stimulus device is a set of headphones.

7. The system of claim 5 wherein the auditory stimulus device is a loudspeaker.

8. The system of claim 1 wherein the patient electronics module further comprises an auxiliary stimulator interface for connecting additional stimulation devices to the patient electronics module.

9. The system of claim 1 wherein the wireless data communication means is a radiofrequency electromagnetic wave signal.

10. The system of claim 1 wherein the wireless data communication means is an infrared signal.

11. The system of claim 1 wherein the multi-channel amplifier has the additional capability to provide low pass filtering of EEG signals.

12. The system of claim 1 wherein the multi-channel amplifier has the additional capability to provide high pass filtering of EEG signals.

13. The system of claim 1 wherein the multi-channel amplifier has the additional capability to provide band pass filtering of EEG signals.

14. The system of claim 1 wherein the patient electronics module is battery powered.

15. The system of claim 1 wherein the subset of the multiplicity of brain electrodes used for stimulation is controlled by commands from the EEG analysis workstation.

16. A portable patient'"'"'s apparatus for EEG monitoring and electrical stimulation, comprising:

a multiplicity of brain electrodes having electrical conducting means to carry electrical signals to and from the multiplicity of brain electrodes;

a subset of the multiplicity of brain electrodes with conducting means being used for the purpose of electrical stimulation of the brain,

a patient electronics module comprising (1) an interface to the conducting means carrying the EEG signals from the multiplicity of brain electrodes, (2) a multiplicity of signal amplifiers having the capability to amplify the electrical signals carried by the conducting means from the multiplicity of brain electrodes, (3) a programmable electrical stimulator having the capability to generate electrical stimulation signals carried by the conducting means to the subset of the multiplicity of brain electrodes and (4) a battery power supply to allow the patient electronics module to be portable so as not to constrain the patient'"'"'s movement.

17. The patient electronics module of claim 16 further comprising a cross-connect circuit capable of switching the electrical stimulation signals generated by the programmable electrical stimulator to select the specific subset of the multiplicity of brain electrodes to be used for electrical stimulation.

18. The system of claim 17 further comprising a system controller with the capability to transmit programming instructions and commands to the signal amplifiers, programmable electrical stimulator and cross-connect circuit.

19. The system of claim 16 further comprising analog-to-digital conversion circuitry capable of converting the outputs of the multiplicity of signal amplifiers into digitized EEG signals.

20. The system of claim 19 further comprising digital memory circuits capable of storing the digitized EEG signals.

21. The system of claim 16 further comprising external equipment and communication means to send and receive signals to and from the external equipment.

22. The system of claim 21 wherein the communication means sends and receives signals from the external equipment via a wireless link.

23. The apparatus of claim 16 wherein the multi-channel amplifier has the additional capability to provide low pass filtering of EEG signals.

24. The apparatus of claim 16 wherein the multi-channel amplifier has the additional capability to provide high pass filtering of EEG signals.

25. The apparatus of claim 16 wherein the multi-channel amplifier has the additional capability to provide band pass filtering of EEG signals.

26. The apparatus of claim 16 wherein the battery power supply is rechargeable.

27. A wireless system for EEG monitoring, comprising:

a multiplicity of brain electrodes having conducting means to carry electrical signals to and from the multiplicity of brain electrodes;

an EEG analysis workstation having the capability to process, store and display EEG signals from the multiplicity of brain electrodes, and further having the capability to identify epileptiform activity in the EEG signals;

a workstation electronics module connected to the EEG analysis workstation, the workstation electronics module having the capability to provide bi-directional wireless data communication capability for the EEG analysis workstation;

a patient electronics module comprising an interface to the conducting means carrying the EEG signals from the multiplicity of brain electrodes, a multiplicity of signal amplifiers having the capability to amplify the electrical signals carried by the conducting means from the multiplicity of brain electrodes, wherein the patient electronics module has the capability to send and receive data to and from the workstation electronics module.

28. The system of claim 27 wherein the EEG analysis workstation has the capability to automatically initiate electrical stimulation to the brain electrodes when epileptiform activity is detected.

29. The system of claim 27 wherein the EEG analysis workstation employs two or more detection algorithms that may be used concurrently to identify epileptiform activity.

30. The system of claim 27 wherein the patient electronics module further comprises an audio output jack for connecting an auditory stimulus device to the patient electronics module.

31. The system of claim 30 wherein the auditory stimulus device is a set of headphones.

32. The system of claim 30 wherein the auditory stimulus device is a loudspeaker.

33. The system of claim 27 wherein the patient electronics module further comprises an auxiliary stimulator interface for connecting additional stimulation devices to the patient electronics module.

34. The system of claim 27 wherein the wireless communication means uses radiofrequency electromagnetic wave signals.

35. The system of claim 27 wherein the wireless communication means uses infrared signals.

36. The system of claim 27 wherein the multi-channel amplifier has the additional capability to provide low pass filtering of EEG signals.

37. The system of claim 27 wherein the multi-channel amplifier has the additional capability to provide high pass filtering of EEG signals.

38. The system of claim 27 wherein the multi-channel amplifier has the additional capability to provide band pass filtering of EEG signals.

39. The system of claim 27 wherein the patient electronics module is battery powered.

40. The system of claim 27 wherein the patient electronics module further comprises analog-to-digital conversion circuitry capable of converting the outputs of the multiplicity of signal amplifiers into digitized EEG signals.

41. The system of claim 40 wherein the patient electronics module further comprises digital memory circuits capable of storing the digitized EEG signals for later transmission to the EEG analysis workstation.

42. The system of claim 41 wherein the digital memory has sufficient capacity to store 48 hours of EEG data from as many as 128 electrodes.