Electrophysiological analysis system
First Claim
1. An electrophysiological analysis system comprising:
- (a) a series of electrodes intended to be placed in different regions of a human body;
(b) a direct current voltage source;
(c) a control circuit suitable for selectively applying direct current pulses, generated by the voltage source, to a pair of active electrodes, the active electrodes forming an anode and a cathode, and for connecting at least one other passive electrode with impedance, the passive electrode serving to measure potential reached by the human body, and the control circuit comprising an amplifier circuit between the direct current voltage source and one of the active electrodes, with a feedback loop controlling gain;
(d) a measurement circuit arranged to obtain data representative of the current at the cathode and the potentials on at least some of the electrodes connected with impedance, in response to the application of the pulses, the data being suitable for use to determining a value of electrochemical conductance of skin of the human body; and
(e) a third circuit controlling a difference between a potential of the anode and a potential reached by the body, according to the voltage delivered by the direct current voltage source.
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Accused Products
Abstract
The disclosure relates to an electrophysiological analysis system including: a series of electrodes intended to be placed in different regions of the human body; a direct current voltage source; a control device adapted (i) to selectively apply direct current pulses, generated by the voltage source, to a pair of so-called active electrodes, the active electrodes forming an anode and a cathode, and (ii) to connect at least one other so-called passive electrode with high-impedance, the electrode measuring the potential reached by the body; and a measurement device arranged to obtain data representative of the current at the cathode and the potentials on at least some of the electrodes connected with high impedance, in response to the application of the pulses, which data can be used to determine a value for the electrochemical conductance of the skin. The system also includes a device for controlling the difference between the potential at the anode and the potential reached by the body, according to the voltage delivered by the direct current voltage source.
43 Citations
17 Claims
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1. An electrophysiological analysis system comprising:
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(a) a series of electrodes intended to be placed in different regions of a human body; (b) a direct current voltage source; (c) a control circuit suitable for selectively applying direct current pulses, generated by the voltage source, to a pair of active electrodes, the active electrodes forming an anode and a cathode, and for connecting at least one other passive electrode with impedance, the passive electrode serving to measure potential reached by the human body, and the control circuit comprising an amplifier circuit between the direct current voltage source and one of the active electrodes, with a feedback loop controlling gain; (d) a measurement circuit arranged to obtain data representative of the current at the cathode and the potentials on at least some of the electrodes connected with impedance, in response to the application of the pulses, the data being suitable for use to determining a value of electrochemical conductance of skin of the human body; and (e) a third circuit controlling a difference between a potential of the anode and a potential reached by the body, according to the voltage delivered by the direct current voltage source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 15)
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8. An electrophysiological analysis method comprising:
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(a) a measurement step during which a direct current voltage source delivers a series of direct current pulses to an anode of active electrodes, and during which the circuit obtains data representative of the current in the active electrodes and potentials on at least some electrodes connected with impedance; (b) a determination step during which conductance of skin at the anode is determined, on the basis of the current passing through the anode and a difference in potential between the anode and the potential reached by a body; and (c) controlling the difference in potential between the anode and the potential reached by the body by the voltage delivered by the direct current voltage source. - View Dependent Claims (9, 16, 17)
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10. An electrophysiological analysis system comprising:
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(a) a series of electrodes intended to be placed in different regions of a human body; (b) a direct current voltage source; (c) at least one circuit selectively applying direct current pulses, generated by the voltage source, to a pair of active electrodes, the active electrodes forming an anode and a cathode, and for connecting at least one other passive electrode with impedance, the passive electrode serving to measure potential reached by the human body; (d) the at least one circuit obtaining data representative of the current at the cathode and the potentials on at least some of the electrodes connected with impedance, in response to the application of the pulses, the data being suitable for use to determining a value of electrochemical conductance of skin of the human body; (e) the at least one circuit directly setting a difference between a potential of the anode and a potential reached by the body, according to the voltage delivered by the direct current voltage source; and (f) the data assisting in evaluating sudomotor function of the human body. - View Dependent Claims (11, 12, 13)
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Specification