# US 10,369,351 B2 · Electrode interfaces and electrode assemblies for performing transcranial direct current stimulation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,369,351 B2 - Document ID: US10369351B2 - Status: Granted - Kind: B2 - Application number: 15/784,697 - Filed: 2017-10-16 - Published: 2018-05-10 - Granted: 2019-08-06 - Earliest claimed: 2016-10-14 - Assignees: Wright State University - Applicants: Michael P. Weisend; Matthew S. Sherwood; Megan K. Howes - Inventors: Michael P. Weisend; Matthew S. Sherwood; Megan K. Howes - Web page: https://patentgrep.com/patent/US10369351B2 ## CPC - A61N 1/0456: {Specially adapted for transcutaneous electrical nerve stimulation [TENS]} - A61N 1/0476: {Array electrodes (including any electrode arrangement with more than one electrode for at least one of the polarities)} - A61N 1/20: continuous direct currents - A61N 1/36025: {for treating a mental or cerebral condition} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract Electrode interfaces and electrode assemblies for performing transcranial direct current stimulation. The electrode interfaces include a body configured to be coupled to an electrode for delivery of electrical current therethrough. The body includes a non-contact surface and a contact surface opposing the non-contact surface. The body defines a plurality of conductivity passages extending therethrough from the non-contact surface to the contact surface. Each conductivity passage is disposed along a central axis and includes at least one branching inlet and at least one branching subpassage extending from the at least one branching inlet to the contact surface. Each branching subpassage defines a plurality of branches, and each branch diverges from the central axis and then extends to the contact surface. The electrode assemblies include a neurostimulation device, at least two electrodes coupled to the neurostimulation device, and an electrode interface including a body coupled to each electrode. ## Claims ### Claim 1 An electrode interface comprising: a body configured to be coupled to an electrode for delivery of electrical current therethrough, wherein the body comprises a non-contact surface and a contact surface opposing the non-contact surface, wherein the body defines a plurality of conductivity passages extending therethrough from the non-contact surface to the contact surface, and wherein each conductivity passage is disposed along a central axis and comprises: at least one branching inlet; and at least one branching subpassage extending from the at least one branching inlet to the contact surface, wherein each branching subpassage defines a plurality of branches, and wherein each branch diverges from the central axis and then extends to the contact surface. ### Claim 2 (depends on 1) The electrode interface of claim 1, wherein the body comprises a rim region and a recessed region for accommodating the electrode. ### Claim 3 (depends on 1) The electrode interface of claim 1, wherein the non-contact surface and the contact surface are parallel. ### Claim 4 (depends on 1) The electrode interface of claim 1, wherein each conductivity passage extends from a conductivity inlet defined by the body to a conductivity outlet defined by the body. ### Claim 5 (depends on 1) The electrode interface of claim 1, wherein the body defines at least six conductivity passages extending therethrough. ### Claim 6 (depends on 5) The electrode interface of claim 5, wherein the at least six conductivity passages are arranged in a hexagon configuration or a triangle configuration. ### Claim 7 (depends on 5) The electrode interface of claim 5, wherein the at least six conductivity passages are arranged in a hexagram configuration. ### Claim 8 (depends on 1) The electrode interface of claim 1, wherein each conductivity passage is tubular. ### Claim 9 (depends on 1) The electrode interface of claim 1, wherein the at least one branching subpassage defines at least two branches which diverge from the central axis and branch toward the contact surface. ### Claim 10 (depends on 1) The electrode interface of claim 1, wherein the at least one branching subpassage defines at least three branches which diverge from the central axis and branch toward the contact surface. ### Claim 11 (depends on 1) The electrode interface of claim 1, wherein each branch extends from the at least one branching inlet to a branching outlet defined by the body. ### Claim 12 (depends on 1) The electrode interface of claim 1, wherein: each conductivity passage includes a conductivity outlet defined by the body; each branching subpassage includes a plurality of branching outlets defined by the body, and the conductivity outlet of each conductivity passage and the respective branching outlets of each branching subpassage thereof are arranged in an inline configuration or a cross configuration. ### Claim 13 An electrode assembly for performing transcranial direct current stimulation, the electrode assembly comprising: a neurostimulation device; at least two electrodes coupled to the neurostimulation device; and an electrode interface comprising a body coupled to each electrode for delivery of electrical current therethrough, wherein the body comprises a non-contact surface and a contact surface opposing the non-contact surface, wherein the body defines a plurality of conductivity passages extending therethrough from the non-contact surface to the contact surface, and wherein each conductivity passage is disposed along a central axis and comprises: at least one branching inlet; and at least one branching subpassage extending from the at least one branching inlet to the contact surface, wherein each branching subpassage defines a plurality of branches, and wherein each branch diverges from the central axis and then extends to the contact surface. ### Claim 14 (depends on 13) The electrode assembly of claim 13, wherein the at least two electrodes are ring electrode. ### Claim 15 (depends on 13) The electrode assembly of claim 13, further comprising a conductive contact medium disposed within the plurality of conductivity passages and the at least one branching subpassage.