# US 2019/0167952 A1 · MRI Compatible Interventional Wireguide > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167952 A1 - Document ID: US20190167952A1 - Status: Published application - Kind: A1 - Application number: 16/207,391 - Filed: 2018-12-03 - Published: 2019-06-06 - Earliest claimed: 2017-12-03 - Assignees: Cook Medical Technologies LLC - Inventors: Ram H Paul, JR.; Richard Swift; Shuo Yang; Tracy Willis; Gary Neff - Web page: https://patentgrep.com/patent/US20190167952A1 ## CPC - A61M 25/09: Guide wires - G01R 33/285: {Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR} - G01R 33/286: {involving passive visualization of interventional instruments, i.e. making the instrument visible as part of the normal MR process} - G01R 33/3685: {Means for reducing sheath currents, e.g. RF traps, baluns} - A61B 5/065: {Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe} - A61M 2025/09083: {having a coil around a core} - A61M 2025/09133: {having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque} - 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)} - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract The disclosure relates to medical devices and methods of assembling medical devices, such as MRI-compatible interventional wireguides. An example of a wireguide includes a series of individual segments, a plurality of connectors, and a plurality of spacers. Each segment in the series of individual segments has a first end and a second end. Each connector of the plurality of connectors joins adjacent segments in the series of individual segments to one another such that a first end of a first segment and a second end of a second segment in the series of individual segments are attached to a connector of the plurality of connectors. A spacer of the plurality of spacers is disposed between each pair of adjacent segments in the series of individual segments. Each of the segments in the series of individual segments is electrically insulated from an adjacent segment in the series of individual segments. ## Claims ### Claim 1 A wireguide, comprising: a series of individual segments, each segment in the series of individual segments having a first end and a second end; a plurality of connectors, each connector of the plurality of connectors joining adjacent segments in the series of individual segments to one another such that a first end of a first segment and a second end of a second segment in the series of individual segments are attached to a connector of the plurality of connectors; and a plurality of spacers, a spacer of the plurality of spacers disposed between each pair of adjacent segments in the series of individual segments; wherein each of the segments in the series of individual segments is electrically insulated from an adjacent segment in the series of individual segments. ### Claim 2 (depends on 1) The wireguide of claim 1, wherein each segment in the series of individual segments has a main body that defines a first plurality of recesses and a second plurality of recesses, the first plurality of recesses defined between the first end of a segment in the series of individual segments and the second end of the segment in the series of individual segments, the second plurality of recesses defined between the first plurality of recesses and the second end of the segment in the series of individual segments. ### Claim 3 (depends on 2) The wireguide of claim 2, wherein each recess in the first plurality of recesses and the second plurality of recesses has a hemispheroid configuration. ### Claim 4 (depends on 2) The wireguide of claim 2, wherein each connector in the plurality of connectors has a main body that defines a first passageway and a plurality of passageways, each passageway of the plurality of passageways extending through the main body and in communication with the first passageway, a portion of the plurality of passageways aligned with a recess of the plurality of recesses. ### Claim 5 (depends on 1) The wireguide of claim 1, wherein a segment in the series of individual segments includes a segment coating formed of an electrically insulating material. ### Claim 6 (depends on 5) The wireguide of claim 5, wherein each spacer of the plurality of spacers is a separate member relative to the segment coating. ### Claim 7 (depends on 5) The wireguide of claim 5, wherein the segment coating is formed of a polymer. ### Claim 8 (depends on 1) The wireguide of claim 1, wherein each spacer of the plurality of spacers is formed of an electrically insulating material. ### Claim 9 (depends on 1) The wireguide of claim 1, further comprising an atraumatic distal tip on the second end of a segment in the series of individual segments. ### Claim 10 (depends on 9) The wireguide of claim 9, wherein the atraumatic distal tip is a separate member attached to the second end of the segment in the series of individual segments. ### Claim 11 (depends on 1) The wireguide of claim 1, wherein each segment in the series of individual segments has a length that is between about 12 centimeters and about 30 centimeters. ### Claim 12 (depends on 1) The wireguide of claim 1, further comprising a wireguide coating disposed over the series of individual segments and the plurality of connectors. ### Claim 13 (depends on 12) The wireguide of claim 12, wherein the wireguide coating is formed of an electrically insulating material. ### Claim 14 (depends on 1) The wireguide of claim 1, further comprising a plurality of markers attached to series of individual segments, each marker of the plurality of markers formed of a material that is visible under MRI. ### Claim 15 (depends on 14) The wireguide of claim 14, further comprising an atraumatic distal tip on the second end of a segment in the series of individual segments; wherein a distal tip marker of the plurality of markers is disposed on the atraumatic distal tip, the distal tip marker being distinguishable from each remaining marker of the plurality of markers under MRI. ### Claim 16 (depends on 1) The wireguide of claim 1, wherein each segment in the series of individual segments is formed of Nitinol. ### Claim 17 (depends on 1) The wireguide of claim 1, wherein each connector of the plurality of connectors is formed of Nitinol. ### Claim 18 (depends on 1) The wireguide of claim 1, wherein each segment of the series of individual segments has a diameter between about 0.022 inches and about 0.024 inches. ### Claim 19 A wireguide, comprising: a series of individual segments, each segment in the series of individual segments having a first end, a second end, and a main body, each segment in the series of individual segments including a segment coating formed of an electrically insulating material, the main body of each segment in the series of individual segments defining a first plurality of recesses and a second plurality of recesses, the first plurality of recesses defined between the first end of a segment in the series of individual segments and the second end of the segment in the series of individual segments, the second plurality of recesses defined between the first plurality of recesses and the second end of the segment in the series of individual segments; a plurality of connectors, each connector of the plurality of connectors joining adjacent segments in the series of individual segments to one another such that a first end of a first segment and a second end of a second segment in the series of individual segments are attached to a connector of the plurality of connectors, each connector in the plurality of connectors having a main body defining a first passageway and a plurality of passageways, each passageway of the plurality of passageways extending through the main body and in communication with the first passageway, a portion of the plurality of passageways aligned with a recess of the plurality of recesses; and a plurality of spacers, a spacer of the plurality of spacers disposed between each pair of adjacent segments in the series of individual segments, each spacer of the plurality of spacers being a separate member relative to the segment coating and formed of an electrically insulating material; wherein each of the segments in the series of individual segments is electrically insulated from an adjacent segment in the series of individual segments. ### Claim 20 A wireguide, comprising: a series of individual segments, each segment in the series of individual segments formed of Nitinol and having a first end, a second end, and a main body, each segment in the series of individual segments including a segment coating formed of a polymer and having a length that is less than 10 centimeters, the main body of each segment in the series of individual segments defining a first plurality of recesses and a second plurality of recesses, the first plurality of recesses defined between the first end of a segment in the series of individual segments and the second end of the segment in the series of individual segments, the second plurality of recesses defined between the first plurality of recesses and the second end of the segment in the series of individual segments, each recess of the first plurality of recesses and the second plurality of recesses having a hemispheroid configuration; a plurality of connectors, each connector of the plurality of connectors joining adjacent segments in the series of individual segments to one another such that a first end of a first segment and a second end of a second segment in the series of individual segments are attached to a connector of the plurality of connectors, each connector in the plurality of connectors having a main body defining a first passageway and a plurality of passageways, each passageway of the plurality of passageways extending through the main body and in communication with the first passageway, a portion of the plurality of passageways aligned with a recess of the plurality of recesses; and a plurality of spacers, a spacer of the plurality of spacers disposed between each pair of adjacent segments in the series of individual segments, each spacer of the plurality of spacers being a separate member relative to the segment coating and formed of an electrically insulating material; a wireguide coating disposed over the series of individual segments and the plurality of connectors, the wireguide coating formed of an electrically insulating material; and a plurality of markers attached to series of individual segments, each marker of the plurality of markers formed of a material that is visible under MRI; wherein each of the segments in the series of individual segments is electrically insulated from an adjacent segment in the series of individual segments.