METHOD AND SYSTEM FOR MONITORING AND DISPLAYING PHYSIOLOGICAL CONDITIONS

• US 20150126890A1
• Filed: 10/14/2014
• Published: 05/07/2015
• Est. Priority Date: 04/15/2008
• Status: Active Grant

• Current Assignee: Christopher Scheib
• Original Assignee: Christopher Scheib
• Inventors: Scheib, Christopher
• Granted Patent: US 9,820,689 B2
• Time in Patent Office: Days
• US Class Current: 600/544
• CPC Class Codes: A61B 5/165 Evaluating the state of mind, e.g. depression, anxiety
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/374 Detecting the frequency distribution of signals, e.g. detecting delta, theta, alpha, beta or gamma waves
• CPC Class Codes: A61B 5/4821 Determining level or depth of anaesthesia A61B5/1106 takes precedence
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/743 Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots

Abstract

Providing an indication of a state of awareness for a patient includes acquiring an EEG signal; filtering the EEG signal to generate a first frequency band of signals; and filtering the EEG signal to generate a second frequency band of signals. Providing the indication also includes concurrently displaying the first and second frequency bands of signals in a single display window such that at least a first portion of the first frequency band overlaps, spatially the second frequency band.

Claims

1. A method for providing an indication of a state of awareness for a patient, comprising:

acquiring an EEG signal;

filtering the EEG signal to generate a first frequency band of signals;

filtering the EEG signal to generate a second frequency band of signals; and

concurrently displaying the first and second frequency bands of signals in a single display window such that at least a first portion of the first frequency band overlaps, spatially the second frequency band.

2. The method of claim 1, wherein:

the first frequency band of signals ranges in amplitude between a first negative value and a second positive value; and

the second frequency band of signals ranges in amplitude between a third negative value and a fourth positive value.

3. The method of claim 1, wherein:

the first frequency band of signals ranges in amplitude between zero and a first positive value; and

the second frequency band of signals ranges in amplitude between zero and a second positive value.

4. The method of claim 1, wherein a respective amplitude display scale for the first and second bands are different from one another.

5. The method of claim 1, further comprising:

filtering the EEG signal to generate a third frequency band of signals; and

concurrently displaying the first, second, and third frequency bands of signals such that at least a second portion of the first frequency band overlaps, spatially the second frequency band and the third frequency band.

6. The method of claim 3, wherein the single display window comprises a top half and a bottom half and the first and second frequency bands are displayed in the top half.

7. The method of claim 6, further comprising:

filtering the EEG signal to generate a third frequency band of signals;

filtering the EEG signal to generate a fourth frequency band of signals; and

concurrently displaying the third and fourth frequency bands of signals in the bottom half of the single display window such that at least a first portion of the third frequency band overlaps, spatially the fourth frequency band.

8. The method of claim 1, further comprising:

selecting a range of frequencies for the first frequency band based on one or more attributes of the EEG signal.

9. The method of claim 8, wherein the one or more attributes includes a peak frequency or a trough frequency within one of the first frequency band of signals and the second frequency band of signals.

10. The method of claim 1, wherein the first frequency band of signals is displayed translucently such that the second frequency band is not obscured by the overlapping first portion.

11. An apparatus for providing an indication of a state of awareness for a patient, comprising:

a receiver configured to acquire an EEG signal

a first filter coupled with the receiver and configured to filter the EEG signal to generate a first frequency band of signals;

a second filter coupled with the receiver and configured to filter the EEG signal to generate a second frequency band of signals; and

a visual display screen configured to concurrently display the first and second frequency bands of signals in a single display window such that at least a first portion of the first frequency band overlaps, spatially the second frequency band.

12. The apparatus of claim 11, wherein:

the first frequency band of signals ranges in amplitude between a first negative value and a second positive value; and

the second frequency band of signals ranges in amplitude between a third negative value and a fourth positive value.

13. The apparatus of claim 11, wherein:

the first frequency band of signals ranges in amplitude between zero and a first positive value; and

the second frequency band of signals ranges in amplitude between zero and a second positive value.

14. The apparatus of claim 11, wherein a respective amplitude display scale for the first and second bands are different from one another.

15. The apparatus of claim 13, wherein the single display window comprises a top half and a bottom half and the first and second frequency bands are displayed in the top half.

16. The apparatus of claim 15, further comprising:

a third filter coupled with the receiver and configured to filter the EEG signal to generate a third frequency band of signals;

a fourth filter coupled with the receiver and configured to filter the EEG signal to generate a fourth frequency band of signals; and

the visual display screen further configured to concurrently display the third and fourth frequency bands of signals in the bottom half of the single display window such that at least a first portion of the third frequency band overlaps, spatially the fourth frequency band.

17. The apparatus of claim 11, wherein the first frequency band of signals is displayed translucently such that the second frequency band is not obscured by the overlapping first portion.

18. A method for providing an indication of a state of awareness for a patient, comprising:

acquiring an EEG signal;

band pass filtering the EEG signal to generate a first signal in a first frequency band;

bandpass filtering the EEG signal to generate a second signal in a second frequency band;

mixing the first and second frequency signal to produce a combined signal; and

displaying the combined signal.

19. The method of claim 18, further comprising:

selecting a range of frequencies for the first frequency band based on one or more attributes of the EEG signal.

20. The method of claim 19, wherein the one or more attributes includes a peak frequency or a trough frequency within one of the first frequency band and the second frequency band.

21. The method of claim 18, wherein the first frequency band ranges from about 0.1 to 1.5 Hz.

22. The method of claim 21, wherein the second frequency band ranges from about 7 to 14 Hz.

23. An apparatus for providing an indication of a state of awareness for a patient, comprising:

a receiver configured to acquire an EEG signal;

a first bandpass filter coupled with the receiver and configured to filter the EEG signal to generate a first signal in a first frequency band;

a second bandpass filter coupled with the receiver and configured to filter the EEG signal to generate a second signal in a second frequency band;

a mixer coupled with the first and second bandpass filters and configured to combine the first signal and the second signal to produce a combined signal; and

a visual display screen configured to display the combined signal.

24. The apparatus of claim 23, wherein a range of frequencies for the first frequency band is selected based on one or more attributes of the EEG signal.

25. The apparatus of claim 24, wherein the one or more attributes includes a peak frequency or a trough frequency within one of the first frequency band and the second frequency band.

26. The apparatus of claim 23, wherein the first frequency band ranges from about 0.1 to 1.5 Hz.

27. The apparatus of claim 26, wherein the second frequency band ranges from about 7 to 14 Hz.