# US 10,441,754 B2 · Intravascular devices, systems, and methods having a core wire formed of multiple materials

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- Number: US 10,441,754 B2
- Document ID: US10441754B2
- Status: Granted
- Kind: B2
- Application number: 14/663,185
- Filed: 2015-03-19
- Published: 2015-10-01
- Granted: 2019-10-15
- Earliest claimed: 2014-03-26
- Assignees: Volcano Corporation
- Applicants: Volcano Corporation
- Inventors: Mark Richardson
- Web page: https://patentgrep.com/patent/US10441754B2

## CPC

- A61M 25/09: Guide wires
- A61B 5/0215: by means inserted into the body
- A61B 5/026: Measuring blood flow {(A61B3/1233, A61B3/1241 take precedence)}
- A61L 31/022: {Metals or alloys}
- A61L 31/10: Macromolecular materials
- A61B 5/02055: {Simultaneously evaluating both cardiovascular condition and temperature}
- A61M 2025/09075: {having a core without a coil possibly combined with a sheath}
- A61M 2025/09108: {Methods for making a guide wire}
- A61M 2025/09141: {made of shape memory alloys which take a particular shape at a certain temperature}
- A61M 2210/12: Blood circulatory system
- A61M 2230/30: Blood pressure (A61M2230/04 takes precedence)
- A61M 2230/50: Temperature
- Y10T 29/49169: Assembling electrical component directly to terminal or elongated conductor
- Y10T 29/49171: with encapsulating
- 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)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Intravascular devices, systems, and methods are disclosed. In some instances, the intravascular device is a guide wire having a core wire formed of multiple materials. For example, a sensing guide wire is provided that includes a core member having an inner section and an outer section surrounding the inner section, wherein the inner section is formed of a first material and the outer section is formed of a second material that is different than the first material; and a sensing element coupled to a distal portion of the core member. Methods of making, manufacturing, and/or assembling such intravascular devices and associated systems are also provided.

## Claims

### Claim 1

A sensing guide wire, comprising:
a core member comprising an inner section and an outer section surrounding the inner section, wherein the inner section is formed of a first material and the outer section is formed of a second material that is different than the first material;
a single outer layer surrounding the core member;
a flexible element coupled to a distal portion of the core member;
a sensing element adjacent to the flexible element;
a connector coupled to a proximal portion of the sensing guide wire; and
at least one communication line embedded within the single outer layer such that the at least one communication line and the core member are isolated by the single outer layer,
wherein the single outer layer is directly in contact with both the core member and the at least one communication line,
wherein the sensing element is communicatively coupled to the connector via the at least one communication line, and
wherein the at least one communication line comprises an exposed section at a distal portion of the sensing guide wire, wherein the exposed section is exposed by removal of a portion of the single outer layer at the distal portion of the sensing guide wire, and wherein the sensing element is electrically coupled to the at least one communication line by an electrical coupling between the exposed section and the at least one communication line.

### Claim 2 (depends on 1)

The guide wire of claim 1, wherein the sensing element includes at least one of a pressure sensor or a flow sensor.

### Claim 3 (depends on 1)

The guide wire of claim 1, wherein the single outer layer comprises a polymer outer layer.

### Claim 4 (depends on 1)

The guide wire of claim 1, wherein the at least one communication line includes at least one of a conductor or an optical fiber.

### Claim 5 (depends on 1)

The guide wire of claim 1, wherein the first material is Nitinol or other nickel titanium alloy.

### Claim 6 (depends on 5)

The guide wire of claim 5, wherein the second material is stainless steel or a high modulus alloy.

### Claim 7 (depends on 1)

The guide wire of claim 1, wherein the first material is stainless steel.

### Claim 8 (depends on 7)

The guide wire of claim 7, wherein the second material is Nitinol.

### Claim 9 (depends on 1)

The guide wire of claim 1, wherein the guide wire has an outer diameter of between about 0.014″ and about 0.038″.

### Claim 10 (depends on 9)

The guide wire of claim 9, wherein the inner section of the core member has an outer diameter between about 0.001″ and about 0.012″.

### Claim 11 (depends on 10)

The guide wire of claim 10, wherein the outer section of the core member has a thickness between about 0.001″ and about 0.0065″.

### Claim 12 (depends on 1)

The guide wire of claim 1, wherein at least the outer section is removed from a distal portion of the core member.

### Claim 13 (depends on 12)

The guide wire of claim 12, wherein the sensing element is positioned within a housing coupled to the distal portion of the core member.

### Claim 14 (depends on 13)

The guide wire of claim 13, wherein the flexible element is positioned around the distal portion of the core member proximal of the housing.

### Claim 15 (depends on 13)

The guide wire of claim 13, wherein diameters of the inner section and the outer section are substantially equal.

### Claim 16 (depends on 13)

The guide wire of claim 13, wherein a diameter of the inner section is larger than a diameter of the outer section.

### Claim 17 (depends on 1)

The guide wire of claim 1, wherein the at least one communication line comprises a plurality of communication lines, and wherein the plurality of communication lines are spaced substantially equally around a circumference of the guide wire.

### Claim 18 (depends on 1)

The guide wire of claim 1, wherein a portion of the single outer layer is directly in contact with an entire circumference of the core member and an entire circumference of the at least one communication line.

### Claim 19 (depends on 1)

The guide wire of claim 1, wherein the first material and second material comprise metallic materials, and wherein the single outer layer is in direct contact with the second material of the outer section of the core member.

### Claim 20 (depends on 1)

The guide wire of claim 1, wherein the at least one communication line comprises a proximal exposed section at the proximal portion of the sensing guide wire, wherein the proximal exposed section is exposed by removal of a portion of the single outer layer at the proximal portion of the sensing guide wire, and wherein the connector is communicatively coupled to the at least one communication line at the proximal exposed section.

### Claim 21 (depends on 1)

The guide wire of claim 1, wherein the at least one communication line comprises a conductor, and wherein the connector comprises a conductive connector.