Method and apparatus for monitoring eye tremor

• US 8,500,282 B2
• Filed: 09/22/2011
• Issued: 08/06/2013
• Est. Priority Date: 11/22/2000
• Status: Active Grant

• Current Assignee: Brainstem Biometrics
• Original Assignee: Boston Brainstem, Inc.
• Inventors: Arms, Steven W., Townsend, Christopher P., Smith, Kurt R., Bolger, Ciaran
• Primary Examiner(s): DOUGHERTY, SEAN PATRICK
• Application Number:
  US13/240,457
• Publication Number:
  US 20120010536A1
• Time in Patent Office: 684 Days
• Field of Search: 600/587, 600/588, 600/595, 600/383, 351/209
• US Class Current: 351/209
• CPC Class Codes: A61B 2562/02 Details of sensors specially adapted for in-vivo measurements
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61B 3/113 for determining or recording eye movement
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/1101 Detecting tremor
• CPC Class Codes: A61B 5/4821 Determining level or depth of anaesthesia A61B5/1106 takes precedence
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61B 5/6821 Eye
• CPC Class Codes: A61B 5/725 using specific filters therefor, e.g. Kalman or adaptive filters A61B5/316 take precedence
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00

Abstract

An apparatus consistent with the present invention comprises a sensor for receiving a signal representing eye tremor and a processor for monitoring eye tremor while receiving the signal. A method consistent with the present invention includes receiving a signal representing eye tremor, comparing the received signal representing eye tremor to at least one reference value, and classifying a patient'"'"'s brain stem function using the comparison of the received signal representing eye tremor to at least one reference value. An embodiment consistent with the present invention includes an ocular micro tremor (OMT) sensor and associated signal processing hardware and software for clinical analyses.

Claims

1. An eye tremor monitoring system, comprising:

a sensor for receiving a signal representing eye tremor;

a filter for filtering microsaccades from the signal; and

a processor for monitoring eye tremor based on the filtered signal.

2. The system of claim 1, wherein the sensor is capable of receiving the signal representing eye tremor through a closed eye lid.

3. The system of claim 1, wherein the sensor comprises a piezoelectric element.

4. The system of claim 1, wherein the processor comprises a filter for selecting an eye tremor signal window.

5. The system of claim 1, wherein the processor comprises a self adjusting filter.

6. The system of claim 1, further comprising:

a wireless transmitter for transmitting the signal representing eye tremor.

7. The system of claim 1, further comprising:

a controller for generating a signal controlling medication dosage.

8. The system of claim 1, further comprising:

a controller for generating a control signal for a patient monitoring device.

9. The system of claim 1, wherein the processor comprises a peak counter.

10. The system of claim 1, further comprising:

a transmitter for transmitting a control signal to a patient monitoring device.

11. The system of claim 1, further comprising:

a display responsive to said signal.

12. The system of claim 1, further comprising:

a transmitter for transmitting said signal to an information system.

13. The system of claim 1, further comprising:

a wireless transmitter for transmitting a control signal to a patient monitoring device.

14. The system of claim 1, further comprising:

a self-test controller.

15. The system of claim 1, wherein the processor comprises a filter to reduce signal interference from a power supply.

16. The system of claim 1, wherein the processor comprises a filter to reduce the effect of a seismic event.

17. The system of claim 1, wherein the processor comprises:

a seismic event detector, and

a seismic event filter controllable by the seismic event detector for reducing an effect of a seismic event.

18. The system of claim 1, wherein the processor comprises a seismic event filter to reduce an effect of a seismic event caused by a surgical instrument.

19. The system of claim 1, further comprising:

a forehead-mounted sensor for reducing an effect of a seismic event.

20. The system of claim 1, wherein the processor comprises an amplitude gauge.

21. The system of claim 1, further comprising:

a wireless transmitter for transmitting said signal to an information system.

22. The system of claim 1, further comprising:

a sensor supporting mount that supports the sensor, wherein the mount includes a second sensor.

23. An eye tremor monitoring system, comprising:

a sensor for receiving a signal representing eye tremor;

a self-adjusting filter for filtering microsaccades from the signal;

a hinged sensor mount; and

a processor for monitoring eye tremor based on the filtered signal.