Method and apparatus for the collection of physiological electrical potentials

• US 7,548,774 B2
• Filed: 03/15/2007
• Issued: 06/16/2009
• Est. Priority Date: 10/23/2003
• Status: Active Grant

• Current Assignee: Vivosonic, Inc.
• Original Assignee: Vivosonic, Inc.
• Inventors: Sokolov, Yuri, Kurtz, Isaac
• Primary Examiner(s): Cohen; Lee S
• Application Number:
  US11/686,549
• Publication Number:
  US 20070179391A1
• Time in Patent Office: 824 Days
• Field of Search: 600/372, 600/383
• US Class Current: 600/372
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/389 Electromyography [EMG]
• CPC Class Codes: A61B 5/6843 Monitoring or controlling sensor contact pressure

Abstract

An apparatus, method and system for collection of physiological electrical potential signals. In one embodiment, an apparatus for use in measuring electrical potentials in a subject (e.g. an animal or a human), having an amplifier being removably mountable to a ground electrode and electrically coupled to at least two signal electrodes, wherein the amplifier is configured to communicate with a signal processing device and indicate if one of the at least two signal electrodes is poorly affixed to, or detached from, said subject. In another embodiment, the at least two signal electrodes comprise a first signal electrode and a second signal electrode, and the amplifier is configured to detect differential electrical potential signals presented by the first signal electrode and the second signal electrode, amplify the differential electrical potential signals by a predetermined gain level to generate an amplified signal, and transmit the amplified signal to the signal processing device.

Claims

1. An amplifier module for use in measuring electrical potentials in a subject, said amplifier module comprising:

an amplifier removably mountable to a ground electrode, and electrically coupled to at least two signal electrodes;

wherein the amplifier is configured to communicate with a signal processing device and indicate which of the at least two signal electrodes is poorly affixed to, or detached from, said subject.

2. The amplifier module of claim 1, wherein the at least two signal electrodes comprise a first signal electrode and a second signal electrode, and the amplifier is configured to:

detect differential electrical potential signals presented by the first signal electrode and the second signal electrode,

amplify the differential electrical potential signals by a predetermined gain level to generate an amplified signal, and

transmit the amplified signal to the signal processing device.

3. The amplifier module of claim 2 further comprising filter circuitry for filtering the differential electrical potential signals received from the at least two signal electrodes to filter out noise.

4. The amplifier module of claim 3 wherein said filter circuitry filters the amplified electrical signal.

5. The amplifier module of claim 2 wherein the amplifier comprises a bipolar transistor amplifier, said bipolar transistor amplifier introducing a bias current into the differential electrical potential signals received from the first and second signal electrodes.

6. The amplifier module of claim 5 wherein the bipolar transistor amplifier generates an output proportional to the difference between the impedance presented to the bipolar transistor amplifier by the first and second signal electrodes to indicate if one of the at least two signal electrodes is poorly affixed to, or detached from, said subject.

7. The amplifier module of claim 2, wherein the amplifier indicates which of the at least two signal electrodes is poorly affixed to, or detached from, said subject based on a difference in impedance in the differential electrical potential signals presented by the first and second signal electrodes.

8. The amplifier module of claim 1 further comprising a wireless signal transmitter for wirelessly transmitting the amplified signal from the amplifier to the signal processing device.

9. The amplifier module of claim 8 wherein the wireless signal transmitter is configured to transmit a digital representation of the amplified signal to the signal processing device.

10. The amplifier module of claim 9, wherein the wireless transmitter comprises an analog-to-digital converter for generating the digital representation of the amplified signal.

11. The amplifier module of claim 1 wherein the amplifier comprises bipolar transistor inputs for indicating if one of the at least two signal electrodes is poorly affixed to, or detached from, said subject.

12. The amplifier module of claim 1 wherein the amplifier generates a sensory signal for presentation to an operator indicating which of the at least two signal electrodes is poorly affixed to, or detached from, said subject.

13. The amplifier module of claim 12 wherein the sensory signal comprises at least one of a visual signal, an audible signal and a tactile signal, for presentation to the operator by the signal processing device.