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Quadrupoles for Remote Electrostimulation Incorporating Bipolar Cancellation.

Shu Xiao^1,2, Ryo Yamada³, Carol Zhou¹

¹Frank Reidy Research Center for Bioelectrics, Old Dominion University, Norfolk, Virginia, USA.

|September 3, 2021

Summary

Cancellation of cancellation (CANCAN) enables remote, focused electrical stimulation. The plate quadrupole configuration shows the most promise for CANCAN, facilitating targeted biological effects like membrane electropermeabilization.

Keywords:

bipolar cancellation electric fields nanosecond pulses quadrupole remote stimulation

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Area of Science:

Biomedical Engineering
Electrophysiology
Neuroscience

Background:

Nanosecond bipolar cancellation (BPC) is used to suppress biological responses.
Achieving focused stimulation remotely is a significant challenge in electrophysiology.

Purpose of the Study:

To define requirements for cancellation of cancellation (CANCAN) implementation.
To identify optimal quadrupole electrode configurations for CANCAN.
To demonstrate CANCAN for remote, focused stimulation.

Main Methods:

Investigated three quadrupole electrode configurations: rod, plate (Plate-Q), and resistor.
Analyzed electric field pulse shapes: monophasic, cancellation, and additive.
Evaluated spatial focusing capabilities and cancellation efficiency.

Main Results:

The Plate-Q configuration demonstrated the highest percentage of cancellation pulses across pulse shapes.
Plate-Q offers superior spatial focusing for CANCAN.
The bipolar field magnitude in Plate-Q is twice the unipolar field, enabling electropermeabilization.

Conclusions:

The Plate-Q configuration is optimal for CANCAN implementation.
CANCAN effectively enables remote, focused electrical stimulation.
This method holds potential for applications requiring precise biological manipulation, such as membrane electropermeabilization.