Case Western Reserve University

Vanderbilt University

National Institutes of Health, a Component of the US Dept. of Health & Human Services

Narendra Bhadra

Kevin L Kilgore

Niloy Bhadra

Tina L Vrabec

Jesse S Wainright

Manfred Franke

Scott Lempka

Douglas Michael Ackermann, Jr

Joe H Payer

Hillel Judah Chiel

Emilie Lothet

Eric Duco Jansen

Mike Jenkins

Kenneth J Gustafson

Douglas Michael Ackermann

David M Roberts

Timothy Y Mariano

Laura Shaw

Jaime L McCoin

Tim Bruns

The present disclose relates to intravertebral electrical block of spinal transmission of neural signals (at least a portion of sensory signals from the peripheral nervous system and/or at least a portion of motor signals to the peripheral nervous system). At least one intravertebral electrode can be located at a level of a spinal cord of a subject. At least one waveform generator can be coupled to the at least one intravertebral electrode and configured to generate an electrical signal that is sent to the at least one intravertebral electrode for application to the level of the spinal cord of the subject.

Intravertebral direct current block of spinal transmission of neural signals

Devices and methods for blocking signal transmission through neural tissue. One step of a method includes placing a therapy delivery device into electrical communication with the neural tissue. The therapy delivery device includes an electrode contact having a high charge capacity material. A multi-phase direct current (DC) can be applied to the neural tissue without damaging the neural tissue. The multi-phase DC includes a cathodic DC phase and anodic DC phase that collectively produce a neural block and reduce the charge delivered by the therapy delivery device. The DC delivery can be combined with high frequency alternating current (HFAC) block to produce a system that provides effective, safe, long term block without inducing an onset response.

Therapy delivery devices and methods for non-damaging neural tissue conduction block

A modified nerve cuff electrode is designed to enhance the stability of neural recording and/or nerve stimulation. Any nerve cuff electrode includes a nerve cuff and a plurality of electrodes within the nerve cuff. While traditional nerve cuff electrodes have every one of the plurality of electrode contacts on the inner surface of the nerve cuff, in the modified nerve cuff electrode each of an inner surface and an outer surface of the nerve cuff has at least one electrode contact. The at least one electrode contact on the outer surface can be electrically isolated from the peripheral nerve to provide a stable reference or ground during recording or a stable pathway for a return current during stimulation to enhance the stability of the recording or the stimulation.

Modified nerve cuff electrode design for stable recording and/or stimulation

Described herein are systems and methods for the treatment of pain using electrical nerve conduction block (ENCB). Contrary to other methods of pain treatment, the ENCB can establish a direct block of neural activity, thereby eliminating the pain. Additionally, the ENCB can be administered without causing electrochemical damage. An example method can include: placing at least one electrode contact in electrical communication with a region of a subject's spinal cord; applying an electrical nerve conduction block (ENCB) to a nerve in the region through the at least one electrode contact; and blocking neural activity with the ENCB to reduce the pain or other unwanted sensation in the subject.

Treatment of pain using electrical nerve conduction block

Systems and methods that deliver a continuous partial nerve conduction block are described. A waveform generator can configure one or more direct current (DC) waveforms to provide a continuous partial nerve conduction block. One or more electrodes can deliver the one or more DC waveforms to provide the partial block to the neural structure. Feedback can be provided to the waveform generator related to the partial block. The feedback includes monitoring a property associated with the partial block and altering a parameter associated with the one or more direct current waveforms in response to the property associated with the partial block.

Partial nerve conduction block using a separated interface nerve electrode (SINE)

One aspect of the present disclosure is a system including a waveform generator, a controller, and an electrical contact. The waveform generator is for generating an electrical nerve conduction block (ENCB). The controller is coupled with the waveform generator. The controller is configured to receive an input comprising at least one parameter to adjust the ENCB. The electrical contact is coupled with the waveform generator. The electrical contact is configured to be placed into contact with a nerve. The electrical contact comprises a high charge capacity material that prevents formation of damaging electro-chemical products at a charge delivered by the ENCB. The electrical contact is configured to deliver the ENCB to the nerve to block transmission of a signal related to a pain through the nerve.

Systems for treatment of a neurological disorder using electrical nerve conduction block

The present disclosure relates to subcutaneous direct current (DC) nerve conduction block. A subcutaneous electrode can be implanted under a subject's skin between the subject's skin and a neural structure within the subject's body. The subcutaneous electrode can be coupled to a current generator. A DC can be configured by the current generator and delivered through the subcutaneous electrode to block conduction in the neural structure. The subcutaneous electrode eliminates an effect of an impedance of the subject's skin on the DC. The DC can be returned to the current generator by a return electrode.

Subcutaneous direct current nerve conduction block

A capacity-expanding separated interface nerve electrode (SINE) can be used to deliver a nerve conduction block to one or more nerves. The SINE can include a source electrode coupled to a waveform generator. The source electrode can deliver an electrical neuromodulation signal (e.g., a direct current (DC) signal) to an ionically conductive medium. The SINE can also include a vessel holding the ionically conductive medium, which can include a material that facilitates a transformation of the electrical neuromodulation signal to an ionic neuromodulation signal with a high charge capacity. The SINE can also include a nerve interface that can deliver the ionic neuromodulation signal to a nerve. The SINE can be used in combination with a return electrode that is also coupled to the waveform generator.

Charge capacity expanding separated interface nerve electrode (SINE)

One aspect of the present disclosure relates a system that can quickly and reversibly block conduction in a nerve. The system can include a first nerve block modality that provides heat to the nerve to block conduction in the nerve. For example, the heat can provide the quick nerve block. The system can also include a second nerve block modality that provides an electrical signal to the nerve to block the conduction in the nerve. For example, the electrical signal can provide the reversibility. In some instances, the heat can be provided by an infrared light signal and the electrical signal can be provided by a kilohertz frequency alternating current (KHFAC) signal or a direct current (DC) signal.

Systems and methods for fast and reversible nerve block

One aspect of the present disclosure is a system including a waveform generator, a controller, and an electrical contact. The waveform generator is for generating an electrical nerve conduction block (ENCB). The controller is coupled with the waveform generator. The controller is configured to receive an input comprising at least one parameter to adjust the ENCB. The electrical contact is coupled with the wave-form generator. The electrical contact is configured to be placed into contact with a nerve. The electrical contact comprises a high charge capacity material that prevents formation of damaging electro-chemical products at a charge delivered by the ENCB. The electrical contact is configured to deliver the ENCB to the nerve to block transmission of a signal related to a pain through the nerve.

The present disclose generally relates to high-charge capacity electrodes that include a substrate and a coating covering at least a portion of the substrate that includes active particles held together by a biocompatible binding material. One aspect of the present disclosure relates a system that can block conduction in a nerve. The system can include a current generator that generates a direct current (DC). The system can also include a high-charge capacity electrode that can be coupled to the current generator to deliver the DC to block conduction in a nerve.

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Chesterland, OH, United States of America

Narendra Bhadra