Method for measuring stable and reproducible electrode-tissue impedance
AssigneeSecond Sight Medical Products, Inc.
InventorsAmy Chu Peishuan Hines, Dao Min Zhou, Arup Roy, Rongqing Dai, Robert J. Greenberg
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Abstract
The present invention is a method for measuring stable and reproducible electrode-tissue impedance, comprising preconditioning an electrode-tissue interface. Further aspect of the invention is a stimulation system for a visual prosthesis generating a stimulation signal to precondition the electrode-tissue interface, comprising a computer; software, loaded in the computer, adapted to perform a stimulating method for a visual prosthesis having a plurality of electrodes; a video processing unit; and an implanted neuron-stimulator.
Claims9
A method for measuring stable and reproducible electrode-tissue impedance, comprising:
- providing a stimulation system including a computer;
- software, loaded in the computer, adapted to perform a stimulating method for a visual prosthesis having a plurality of electrodes;
- a video processing unit;
- and
- an implanted neuron-stimulator including at least one electrode;
- preconditioning the electrode-tissue interface by delivering a first stimulation signal, including charge balanced biphasic square wave current pulses for a duration suitable to precondition the electrode interface to the electrode, the duration being between 1 second and 10 minutes;
- stopping preconditioning at the end of the duration;
- measuring an impedance on the electrode at similar electrode-tissue interface conditions to the preconditioning step, after said preconditioning step within a predetermined delay;
- transmitting the impedance wirelessly to a computer;
- and
- estimating perceptual thresholds based on the impedance.
Dependencies are inferred from the claim text.