# US 11,439,352 B2 · Medical device with adhesive patch longevity > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,352 B2 - Document ID: US11439352B2 - Status: Granted - Kind: B2 - Application number: 16/248,623 - Filed: 2019-01-15 - Published: 2019-07-18 - Granted: 2022-09-13 - Earliest claimed: 2018-01-17 - Assignees: Medtronic MiniMed, Inc. - Applicants: Medtronic Minimed, Inc. - Inventors: Matthew William Yavorsky; Sarnath Chattaraj; Kiem H. Dang; Guangping Zhang - Web page: https://patentgrep.com/patent/US11439352B2 ## CPC - A61B 5/6833: {Adhesive patches} - A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement} - A61B 5/1486: using enzyme electrodes, e.g. with immobilised oxidase - A61M 5/14: Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor - A61M 5/142: Pressure infusion, e.g. using pumps - A61M 5/158: Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} - A61M 39/00: Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use (for respiratory devices, e.g. tracheal tubes, A61M16/00; artificial heart valves A61F2/24) - A61M 39/0247: {Transcutaneous or percutaneous access sites to the inside of the body} - A61B 2505/07: Home care - A61M 2005/1586: {Holding accessories for holding infusion needles on the body} - A61M 2005/1588: {having means for monitoring, controlling or visual inspection, e.g. for patency check or for avoiding extravasation} - A61M 2039/0261: {Means for anchoring port to the body, or ports having a special shape or being made of a specific material to allow easy implantation/integration in the body} - A61M 2205/3569: sublocal, e.g. between console and disposable - A61M 2205/502: User interfaces, e.g. screens or keyboards - A61M 2230/201: Glucose concentration - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A medical device includes a hub and an adhesive patch coupled to the hub. The adhesive patch is to couple the hub to an anatomy. The adhesive patch defines an edge that extends along a perimeter of the adhesive patch. The medical device includes an anisotropic shim coupled to the adhesive patch along the perimeter of the adhesive patch proximate the edge to resist an uncoupling of the adhesive patch from the anatomy. The anisotropic shim has an inner periphery spaced apart from an outer periphery and the anisotropic shim is locally rigid between the inner periphery and the outer periphery. ## Claims ### Claim 1 A medical device, comprising: a hub; an adhesive patch coupled to the hub, the adhesive patch to couple the hub to an anatomy, the adhesive patch defining an edge that extends along a perimeter of the adhesive patch; and an anisotropic shim coupled to the adhesive patch along the perimeter of the adhesive patch proximate the edge to resist an uncoupling of the adhesive patch from the anatomy, the anisotropic shim having an inner periphery spaced apart from an outer periphery, the anisotropic shim is locally rigid between the inner periphery and the outer periphery, the anisotropic shim includes a first slit defined at the outer periphery, the first slit extends radially inward toward the inner periphery and terminates at a first bore defined through the anisotropic shim, a second slit defined at the inner periphery, the second slit extends radially outward toward the outer periphery and terminates at a second bore defined through the anisotropic shim, and the first bore has a first radial distance defined between the first bore and the inner periphery that is different than a second radial distance defined between the second bore and the inner periphery. ### Claim 2 (depends on 1) The medical device of claim 1, wherein the anisotropic shim extends along a longitudinal axis and the anisotropic shim is flexible along the longitudinal axis. ### Claim 3 (depends on 1) The medical device of claim 1, wherein the anisotropic shim has a first side opposite a second side, a thickness defined between the first side and the second side, and the thickness is uniform between the inner periphery and the outer periphery. ### Claim 4 (depends on 3) The medical device of claim 3, wherein the first slit, the first bore, the second slit and the second bore are each defined through the anisotropic shim from the first side to the second side. ### Claim 5 (depends on 1) The medical device of claim 1, wherein the anisotropic shim has a first side opposite a second side, a thickness defined between the first side and the second side, and the thickness varies between the inner periphery and the outer periphery. ### Claim 6 (depends on 5) The medical device of claim 5, wherein the thickness decreases monotonically between the inner periphery and the outer periphery. ### Claim 7 (depends on 1) The medical device of claim 1, wherein the anisotropic shim further comprises a pattern including the first slit, the first bore, the second slit and the second bore that is repeated about a perimeter of the anisotropic shim. ### Claim 8 (depends on 1) The medical device of claim 1, wherein the medical device is an infusion unit, the hub defines a fluid flow path to receive a fluid the infusion unit is fluidly coupled to a fluid infusion device to receive the fluid, the anisotropic shim defines a central bore and the anisotropic shim is coupled to the adhesive patch such that the central bore is positioned about the hub. ### Claim 9 (depends on 1) The medical device of claim 1, wherein the medical device is a physiological characteristic sensor to be coupled to the anatomy to observe a physiological characteristic. ### Claim 10 (depends on 1) The medical device of claim 1, wherein the medical device is a fluid infusion system to be coupled to the anatomy to define a fluid flow path into the anatomy. ### Claim 11 (depends on 1) The medical device of claim 1, wherein the first bore and the second bore are defined through the anisotropic shim between the inner periphery and the outer periphery. ### Claim 12 (depends on 1) The medical device of claim 1, wherein the anisotropic shim is spaced a distance apart from the edge of the adhesive patch. ### Claim 13 An infusion unit, comprising: a hub to define a fluid flow path to receive a fluid; an adhesive patch coupled to the hub, the adhesive patch to couple the hub to an anatomy, the adhesive patch defining an edge that extends along a perimeter of the adhesive patch; and an anisotropic shim coupled to the adhesive patch along the perimeter of the adhesive patch proximate the edge to resist an uncoupling of the adhesive patch from the anatomy, the anisotropic shim defining a central bore and coupled to the adhesive patch such that the central bore is positioned about the hub, the anisotropic shim extends along a longitudinal axis and has an inner periphery spaced apart from an outer periphery, the anisotropic shim is locally rigid between the inner periphery and the outer periphery and flexible along the longitudinal axis, the anisotropic shim includes at least one first slit defined at the outer periphery, the at least one first slit extends radially inward toward the inner periphery and terminates at a first bore defined through the anisotropic shim, at least one second slit defined at the inner periphery, the at least one second slit extends radially outward toward the outer periphery and terminates at a second bore defined through the anisotropic shim, and the first bore has a first radial distance defined between the first bore and the inner periphery that is different than a second radial distance defined between the second bore and the inner periphery. ### Claim 14 (depends on 13) The infusion unit of claim 13, wherein the hub defines a central axis, the anisotropic shim has a center point defined on the central axis, and the first bore and the second bore are radially offset relative to the center point. ### Claim 15 An infusion unit, comprising: a hub to define a fluid flow path to receive a fluid; an adhesive patch coupled to the hub, the adhesive patch to couple the hub to an anatomy, the adhesive patch defining an edge that extends along a perimeter of the adhesive patch; and an anisotropic shim coupled to the adhesive patch along the perimeter of the adhesive patch proximate the edge to resist an uncoupling of the adhesive patch from the anatomy, the anisotropic shim spaced a distance apart from the edge of the adhesive patch, the anisotropic shim defining a central bore and coupled to the adhesive patch such that the central bore is positioned about the hub, the anisotropic shim extends along a longitudinal axis and has an inner periphery spaced apart from an outer periphery, the inner periphery spaced apart from the hub by a distance, the anisotropic shim is locally rigid between the inner periphery and the outer periphery and flexible along the longitudinal axis, the anisotropic shim includes at least one first slit defined at the outer periphery, the at least one first slit extends radially inward toward the inner periphery and terminates at a first bore defined through the anisotropic shim, at least one second slit defined at the inner periphery, the at least one second slit extends radially outward toward the outer periphery and terminates at a second bore defined through the anisotropic shim, the first bore has a first radial distance defined between the first bore and the inner periphery that is different than a second radial distance defined between the second bore and the inner periphery, and the first bore and the second bore are defined through the anisotropic shim between the inner periphery and the outer periphery.