# US 2021/0330985 A1 · Electrical stimulation device with minimally invasive delivery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0330985 A1 - Document ID: US20210330985A1 - Status: Published application - Kind: A1 - Application number: 16/857,747 - Filed: 2020-04-24 - Published: 2021-10-28 - Earliest claimed: 2020-04-24 - Assignees: Medtronic, Inc. - Applicants: Medtronic, Inc. - Inventors: Thomas F. Neils; Andrew J. Cleland; Phillip C. Falkner; Kyle Dahlstrom; Jonathan C. Sell; Jerel K. Mueller; Forrest C.M. Pape - Web page: https://patentgrep.com/patent/US20210330985A1 ## CPC - A61N 1/36071: {Pain} - A61N 1/3758: {Packaging of the components within the casing} - A61B 17/3468: {for implanting or removing devices, e.g. prostheses, implants, seeds, wires (devices for implanting seeds A61M37/0069)} - A61N 1/0551: {Spinal or peripheral nerve electrodes} - A61N 1/36128: {Control systems} - A61N 1/37229: {Shape or location of the implanted or external antenna} - A61N 1/37518: {Anchoring of the implants, e.g. fixation} - A61N 1/3787: {from an external energy source} - A61B 17/00234: {for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence)} - A61N 1/36057: {adapted for stimulating afferent nerves} - A61N 1/37211: {Means for communicating with stimulators} - 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) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract The disclosure describes example devices, systems, and techniques for delivering electrical stimulation to a patient. In some examples, an IMD includes a housing having a main portion and projection extending from the main portion. The projection of the housing may carry an electrode. Stimulation circuitry may be disposed within the main portion of the housing where the stimulation circuitry may generate electrical stimulation deliverable via the electrode. Processing circuitry may be disposed within the main portion of the housing where the processing circuitry may control the stimulation circuitry to generate the electrical stimulation. ## Claims ### Claim 1 An implantable medical device comprising: a housing comprising a main portion and projection extending from the main portion; an electrode carried by the projection of the housing; stimulation circuitry disposed within the main portion of the housing, wherein the stimulation circuitry is configured to generate electrical stimulation deliverable via the electrode; and processing circuitry disposed within the main portion of the housing, wherein the processing circuitry is configured to control the stimulation circuitry to generate the electrical stimulation. ### Claim 2 (depends on 1) The implantable medical device of claim 1, wherein the projection is a first projection, the electrode is a first electrode, and the housing comprises a second projection extending from the main portion, wherein the implantable medical device further comprises: a second electrode carried by the second projection of the housing, wherein the stimulation circuitry is configured to generate electrical stimulation deliverable via the first electrode and the second electrode. ### Claim 3 (depends on 2) The implantable medical device of claim 2, wherein the first projection and the second projection extend from the main portion in approximately a same direction, the first projection and the second projection configured to be disposed on opposing sides of a nerve. ### Claim 4 (depends on 2) The implantable medical device of claim 2, wherein both the first projection and the second projection extend straight out from the main portion of the housing. ### Claim 5 (depends on 2) The implantable medical device of claim 2, wherein: the first projection comprises a first curved distal portion curved towards the second projection; the second projection comprises a second curved distal portion curved towards the first projection; the first electrode is disposed proximal from a tip of the first projection; and the second electrode is disposed proximal from a tip of the second projection. ### Claim 6 (depends on 5) The implantable medical device of claim 5, wherein: the first projection and the second projection are pre-curved; both the first projection and the second projection define respective channels configured to receive a stylet, the first projection and the second projection configured to straighten in response to the stylet being inserted into the respective channels to implant the first and second projections around a target nerve; and removal of the stylet enables the first projection and the second projection to revert to the pre-curved form of the first projection and the second projection to capture the target nerve within the first projection and the second projection. ### Claim 7 (depends on 1) The implantable medical device of claim 1, wherein the electrode is a first electrode, and wherein the implantable medical device further comprises a second electrode carried by the main portion of the housing. ### Claim 8 (depends on 1) The implantable medical device of claim 1, further comprising: a secondary coil configured to receive power from an external primary coil; a rechargeable power source; and charging circuitry configured to control charging of the rechargeable power source using current generated from the secondary coil. ### Claim 9 (depends on 8) The implantable medical device of claim 8, wherein the secondary coil is disposed within the main portion of the housing. ### Claim 10 (depends on 8) The implantable medical device of claim 8, further comprising an appendage extending from the main portion of the housing, wherein the appendage comprises the secondary coil. ### Claim 11 (depends on 1) The implantable medical device of claim 1, further comprising one or more fixation structures extending from the main portion of the housing, each fixation structure of the one or more fixation structures configured to retain the implantable medical device at a target location. ### Claim 12 (depends on 1) The implantable medical device of claim 1, wherein the housing comprises a volume from approximately 1 cubic centimeter (cc) to approximately 2 cc. ### Claim 13 A method comprising: controlling, by processing circuitry disposed within a housing of an implantable medical device, stimulation circuitry of the implantable medical device to generate electrical stimulation, wherein: the housing comprises a main portion and a projection extending from the main portion, the projection of the housing carries an electrode, and the stimulation circuitry and the processing circuitry are disposed within the main portion of the housing; and delivering, via at least the electrode carried by the projection, the electrical stimulation to a target nerve. ### Claim 14 (depends on 13) The method of claim 13, wherein the projection is a first projection, the electrode is a first electrode, and the housing comprises a second projection extending from the main portion and carrying a second electrode, and wherein delivering the electrical stimulation to the target nerve further comprises delivering, via the first electrode and the second electrode, the electrical stimulation to the target nerve. ### Claim 15 (depends on 14) The method of claim 14, wherein the first projection and the second projection extend from the main portion in approximately a same direction. ### Claim 16 (depends on 14) The method of claim 14, wherein both the first projection and the second projection extend straight out from the main portion of the housing. ### Claim 17 (depends on 14) The method of claim 14, wherein: the first projection comprises a first curved distal portion curved towards the second projection; the second projection comprises a second curved distal portion curved towards the first projection; the first electrode is disposed proximal from a tip of the first projection; and the second electrode is disposed proximal from a tip of the second projection. ### Claim 18 (depends on 13) The method of claim 13, wherein the projection is a first projection, the electrode is a first electrode, and the housing comprises a second electrode on the main portion, and wherein delivering the electrical stimulation to the target nerve further comprises delivering, via the first electrode and the second electrode, the electrical stimulation to the target nerve. ### Claim 19 (depends on 13) The method of claim 13, further comprising: charging a rechargeable power source with charging circuitry configured to control charging of the rechargeable power source using current generated from a secondary coil configured to receive power from an external primary coil. ### Claim 20 An implantable medical device comprising: a housing comprising: a main portion; a first projection extending from the main portion; and a second projection extending from the main portion, wherein the first projection and the second projection are configured to be disposed on opposing sides of a nerve; a first electrode carried by the first projection of the housing; a second electrode carried by the second projection of the housing; stimulation circuitry disposed within the main portion of the housing, wherein the stimulation circuitry is configured to generate electrical stimulation deliverable via the first or second electrode; processing circuitry disposed within the main portion of the housing, wherein the processing circuitry is configured to control the stimulation circuitry to generate the electrical stimulation; and charging circuitry disposed within the main portion of the housing, wherein the charging circuitry is configured to control current from a secondary coil to a rechargeable power source of the implantable medical device.