# US 12,594,404 B2 · Guide wire

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,594,404 B2
- Document ID: US12594404B2
- Status: Granted
- Kind: B2
- Application number: 17/982,672
- Filed: 2022-11-08
- Published: 2023-03-02
- Granted: 2026-04-07
- Earliest claimed: 2020-05-08
- Assignees: Asahi Intecc Co., Ltd.
- Applicants: Asahi Intecc Co., Ltd.
- Inventors: Keisuke Ushida; Masahiro Kashiwai
- Web page: https://patentgrep.com/patent/US12594404B2

## CPC

- A61M 25/09: Guide wires
- A61M 25/09016: {with mandrils}
- A61M 2025/09083: {having a coil around a core}
- A61M 2025/09108: {Methods for making a guide wire}
- A61M 2025/09133: {having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque}
- A61M 2025/09191: {made of twisted wires}
- 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 guide wire including a core shaft including a distal end portion having a pseudoelastic property, a tip joined to a distal end of the distal end portion of the core shaft, and an auxiliary wire that is arranged parallel to the distal end portion of the core shaft. The auxiliary wire has a distal end joined to the tip and a rear end joined to the core shaft. The auxiliary wire has a high flexibility, a high breaking strength, and a short breaking elongation compared to the distal end portion of the core shaft.

## Claims

### Claim 1

A guide wire comprising:
a core shaft including a distal end portion having a pseudoelastic property;
a tip joined to a distal end of the distal end portion of the core shaft; and
an auxiliary wire arranged parallel to the distal end portion of the core shaft, the auxiliary wire having a distal end joined to the tip and a rear end joined to the core shaft,
wherein the auxiliary wire is more flexible than the distal end portion of the core shaft,
a breaking strength of the auxiliary wire is higher than a breaking strength of the distal end portion of the core shaft,
a breaking elongation of the auxiliary wire is shorter than a breaking elongation of the distal end portion of the core shaft, and
the breaking elongation of the auxiliary wire is shorter than an elongation at a yield point of the distal end portion of the core shaft.

### Claim 2 (depends on 1)

The guide wire according to claim 1, wherein the auxiliary wire comprises a plurality of strands twisted together.

### Claim 3 (depends on 1)

The guide wire according to claim 1, wherein the pseudoelastic property is an elastic property that occurs in a mechanism other than elasticity resulting from changes in interatomic spacing.

### Claim 4 (depends on 1)

The guide wire according to claim 1, wherein the pseudoelastic property is at least one of transformation pseudoelasticity and twinning pseudoelasticity.