Method and apparatus to provide safety checks for neural stimulation
First Claim
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1. A method of controlling the stimulation of neural tissue comprising:
- providing an implantable neural stimulator driving an array of electrodes suitable to stimulate neural tissue;
generating a test current pulse in said implantable neural stimulator applied to an electrode of said array of electrodes during stimulation of tissue;
shorting said electrode to ground;
taking at least one measurement of an IR voltage drop across said electrode during stimulation of tissue;
calculating a maximum voltage prior to shorting said electrode to ground, from at least one IR voltage drop measurement; and
comparing said maximum voltage to a predetermined voltage value.
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Abstract
Electronic neural tissue stimulators for controlling the level of electrical stimulation in order to prevent damage to the neural tissue. Methods presented in the disclosure include detecting current leakage via electrode impedance measurement, electrode capacitance measurement, and testing the electrode response to a test current pulse. Apparatus presented in the disclosure include circuitry and systems capable of performing the methods disclosed.
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6 Claims
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1. A method of controlling the stimulation of neural tissue comprising:
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providing an implantable neural stimulator driving an array of electrodes suitable to stimulate neural tissue; generating a test current pulse in said implantable neural stimulator applied to an electrode of said array of electrodes during stimulation of tissue; shorting said electrode to ground; taking at least one measurement of an IR voltage drop across said electrode during stimulation of tissue; calculating a maximum voltage prior to shorting said electrode to ground, from at least one IR voltage drop measurement; and comparing said maximum voltage to a predetermined voltage value. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification