IP Library › Granted Patent US 12697470

Granted Patent B2

US 12697470 · App. 18/923,852 · Granted Aug 4, 2026

MRI compatible interventional wireguide

Inventors: Ram H Paul (Bloomington, IN); Richard Swift (South Bend, IN); Shuo Yang (West Lafayette, IN); Tracy Willis (Bloomington, IN); Gary Neff (Bloomington, IN)

Assignee: Cook Medical Technologies LLC

A61M25/09 G01R33/285 G01R33/286 G01R33/3685 A61M2025/09083 A61M2025/09133

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Quick Facts

Patent No.: US 12697470
App. No.: 18/923,852
Granted: Aug 4, 2026
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

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 (49)

1 . A wireguide, comprising:

a first segment having a first segment main body and a first segment coating disposed on the first segment main body, the first segment main body defining a first segment stem; and

a second segment having a second segment main body and a second segment coating disposed on the second segment main body, the second segment main body defining a second segment recess;

wherein the first segment stem is disposed within the second segment recess.

2 . The wireguide of claim 1 , wherein the first segment has a first segment first end, a first segment second end, and the first segment main body defines a first segment recess;

wherein the first segment recess extends into the first segment main body from the first segment second end toward the first segment first end; and

wherein the first segment stem extends from the first segment first end toward the first segment second end.

3 . The wireguide of claim 2 , wherein the second segment has a second segment first end, a second segment second end, and the second segment main body defines a second segment stem;

wherein the second segment recess extends into the second segment main body from the second segment second end toward the second segment first end; and

wherein the second segment stem extends from the second segment first end toward the second segment second end.

4 . The wireguide of claim 1 , wherein the first segment main body defines a first segment recess having a first segment recess inside diameter and a first segment recess depth;

wherein the first segment stem has a first segment stem outside diameter and a first segment stem length;

wherein the first segment stem outside diameter is less than the first segment recess inside diameter; and

wherein the first segment stem length is less than the first segment recess depth.

5 . The wireguide of claim 1 , wherein the first segment has a first segment first end, a first segment second end, and the first segment main body defines a first segment recess;

wherein the first segment recess has a first segment recess inside diameter;

wherein the first segment stem has a first segment stem outside diameter; and

wherein the first segment main body has a first segment main body outside diameter between the first segment second end and the first segment stem that is greater than the first segment recess inside diameter and the first segment stem outside diameter.

6 . The wireguide of claim 1 , wherein the second segment recess has a second segment recess inside diameter and a second segment recess depth;

wherein the second segment main body defines a second segment stem having a second segment stem outside diameter and a second segment stem length;

wherein the second segment stem outside diameter is less than the second segment recess inside diameter; and

wherein the second segment stem length less than the second segment recess depth.

7 . The wireguide of claim 1 , wherein the second segment has a second segment first end, a second segment second end, and the second segment main body defines a second segment stem;

wherein the second segment recess has a second segment recess inside diameter;

wherein the second segment stem has a second segment stem outside diameter; and

wherein the second segment main body has a second segment main body outside diameter between the second segment second end and the second segment stem that is greater than the second segment recess inside diameter and the second segment stem outside diameter.

8 . The wireguide of claim 1 , further comprising an adhesive disposed in the second segment recess.

9 . The wireguide of claim 1 , wherein each of the first segment coating and the second segment coating comprises a polymeric material.

10 . The wireguide of claim 9 , wherein each of the first segment coating and the second segment coating comprises a polyimide.

11 . The wireguide of claim 1 , wherein the first segment coating is disposed on the first segment stem.

12 . The wireguide of claim 1 , wherein the second segment coating is disposed within the second segment recess.

13 . The wireguide of claim 1 , wherein the first segment coating is disposed on the first segment stem; and

wherein the second segment coating is disposed within the second segment recess.

14 . The wireguide of claim 1 , wherein the first segment coating is disposed on the entire first segment main body; and

wherein the second segment coating is disposed on the entire second segment main body.

15 . The wireguide of claim 1 , wherein the first segment coating has a thickness between about 0.0001 inches and about 0.005 inches.

16 . The wireguide of claim 1 , further comprising a marker disposed on one of the first segment and the second segment; and

wherein the marker comprises a material that is visible under MRI.

17 . The wireguide of claim 1 , wherein each of the first segment and the second segment comprises Nitinol.

18 . The wireguide of claim 1 , further comprising a wireguide coating disposed over the first segment coating and the second segment coating.

19 . A wireguide, comprising:

a first segment having a first segment first end, a first segment second end, a first segment main body, and a first segment polymeric coating disposed on the first segment main body, the first segment main body defining a first segment recess and a first segment stem, the first segment recess extending into the first segment main body from the first segment second end toward the first segment first end, the first segment stem extending from the first segment first end toward the first segment second end; and

a second segment having a second segment first end, a second segment second end, a second segment main body, and a second segment polymeric coating disposed on the second segment main body, the second segment main body defining a second segment recess and a second segment stem, the second segment recess extending into the second segment main body from the second segment second end toward the second segment first end, the second segment stem extending from the second segment first end toward the second segment second end; and

wherein the first segment stem is disposed within the second segment recess.

20 . A wireguide, comprising:

a first segment having a first segment first end, a first segment second end, a first segment main body, and a first segment polymeric coating disposed on the entire first segment main body, the first segment main body defining a first segment recess and a first segment stem, the first segment recess extending into the first segment main body from the first segment second end toward the first segment first end, the first segment stem extending from the first segment first end toward the first segment second end;

a second segment having a second segment first end, a second segment second end, a second segment main body, and a second segment polymeric coating disposed on the entire second segment main body, the second segment main body defining a second segment recess and a second segment stem, the second segment recess extending into the second segment main body from the second segment second end toward the second segment first end, the second segment stem extending from the second segment first end toward the second segment second end;

an adhesive disposed in the second segment recess; and

wherein the first segment stem is disposed within the second segment recess.