# US 12,178,975 B2 · Guidewire having enlarged, micro-fabricated distal section > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,975 B2 - Document ID: US12178975B2 - Status: Granted - Kind: B2 - Application number: 17/154,777 - Filed: 2021-01-21 - Published: 2021-07-29 - Granted: 2024-12-31 - Earliest claimed: 2020-01-23 - Assignees: Scientia Vascular, LLC - Applicants: SCIENTIA VASCULAR, Inc. - Inventors: John A. Lippert; Edward J. Snyder - Web page: https://patentgrep.com/patent/US12178975B2 ## CPC - A61M 25/09: Guide wires - A61M 25/09041: {Mechanisms for insertion of guide wires} - A61M 2025/09075: {having a core without a coil possibly combined with a sheath} - A61M 2025/09083: {having a coil around a core} - A61M 2025/09108: {Methods for making a guide wire} - A61M 2025/09166: {having radio-opaque features} - A61M 2025/09175: {having specific characteristics at the distal tip} - 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 Disclosed is a guidewire having a core wire and an outer tube within which the distal section of the core is inserted. The outer diameter of the tube is greater than the outer diameter of the proximal section of the core wire. The guidewire also includes a proximal coil and a distal, radiopaque coil each disposed over the distal section of the core. A bushing coil is disposed over the proximal coil and distal coil. The proximal coil, distal coil, and bushing coil aid in filling the annular space between the core and the tube and thereby centering and aligning the core and tube. ## Claims ### Claim 1 An intravascular device, comprising: a core having a proximal section and a distal section; an outer tube coupled to the core such that the distal section of the core passes into and is encompassed by the outer tube, the outer tube and the core defining an annular space between an inner surface of the outer tube and the distal section of the core disposed within the outer tube; a distal coil encompassing part of the distal section of the core; a proximal coil disposed proximal of the distal coil and encompassing part of the distal section of the core; and a bushing coil disposed over at least a portion of the distal coil and over at least a portion of the proximal coil, wherein the distal coil, proximal coil, and bushing coil fill at least a portion of the annular space, wherein an outer diameter of the outer tube is greater than an outer diameter of the proximal section of the core, and wherein the outer tube includes fenestrations that form a plurality of axially extending beams connecting circumferentially extending rings, wherein the fenestrations form a two-beam section proximal of a one-beam section proximal of a distal-most two-beam section. ### Claim 2 (depends on 1) The device of claim 1, wherein the distal coil is more radiopaque than stainless steel. ### Claim 3 (depends on 1) The device of claim 1, wherein the proximal coil is less radiopaque than the distal coil. ### Claim 4 (depends on 1) The device of claim 1, wherein a wire size of the distal coil, proximal coil, and/or bushing coil is about 0.006 inches or less. ### Claim 5 (depends on 1) The device of claim 1, wherein the bushing coil extends farther proximally than the proximal coil. ### Claim 6 (depends on 1) The device of claim 1, wherein the bushing coil has a length of at least about 60% of the length of the outer tube. ### Claim 7 (depends on 1) The device of claim 1, wherein at least one of the proximal coil, distal coil, and bushing coil is wound in a direction opposite the other coils. ### Claim 8 (depends on 7) The device of claim 7, wherein the proximal coil and the distal coil are each wound in a first direction, while the bushing coil is counter-wound in a second, opposite direction. ### Claim 9 (depends on 1) The device of claim 1, wherein the bushing coil has a pitch that is smaller than that of the proximal coil and/or distal coil. ### Claim 10 (depends on 1) The device of claim 1, wherein the proximal coil, distal coil, and bushing coil fill 50% or more of the volume of the annular space. ### Claim 11 (depends on 1) The device of claim 1, wherein the outer diameter of the outer tube is larger than the outer diameter of the proximal section of the core by 15% to 80%. ### Claim 12 (depends on 1) The device of claim 1, further comprising a bushing disposed at a proximal end of the outer tube to aid in coupling the outer tube to the core. ### Claim 13 (depends on 12) The device of claim 12, wherein the bushing comprises a chamfered or beveled proximal edge. ### Claim 14 (depends on 13) The device of claim 13, wherein the bushing also comprises a chamfered or beveled distal edge. ### Claim 15 (depends on 1) The device of claim 1, wherein the outer tube includes at least one of a three-beam section, a two-beam section, and a one-beam section. ### Claim 16 (depends on 1) The device of claim 1, wherein a flattened distal section of the core has a preferred bending plane and wherein the preferred bending plane of the flattened distal section is aligned with a preferred bending plane of a portion of the outer tube overlying the flattened distal section. ### Claim 17 (depends on 1) The device of claim 1, wherein the distal-most two-beam section is shorter than the one-beam section. ### Claim 18 An intravascular device, comprising: a core having a proximal section and a distal section; an outer tube coupled to the core such that the distal section of the core passes into and is encompassed by the outer tube, the outer tube and the core defining an annular space between an inner surface of the outer tube and the distal section of the core disposed within the outer tube, wherein an outer diameter of the outer tube is greater than an outer diameter of the proximal section of the core; a distal coil encompassing part of the distal section of the core; a proximal coil disposed proximal of the distal coil and encompassing part of the distal section of the core; a bushing coil disposed over the distal coil and the proximal coil; and a bushing disposed at a proximal end of the outer tube to aid in coupling the outer tube to the core, wherein the bushing comprises a chamfered or beveled proximal edge and a chamfered or beveled distal edge.