# US 2023/0141641 A1 · Balloon catheter

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- Number: US 2023/0141641 A1
- Document ID: US20230141641A1
- Status: Published application
- Kind: A1
- Application number: 17/915,927
- Filed: 2021-03-31
- Published: 2023-05-11
- Earliest claimed: 2020-03-31
- Assignees: Toray Industries, Inc.
- Applicants: Toray Industries, Inc.
- Inventors: Hiroyuki Harada; Yumi Oka; Kohei Fujii
- Web page: https://patentgrep.com/patent/US20230141641A1

## CPC

- A61B 18/04: by heating (by applying electromagnetic radiation A61B18/18)
- A61M 25/10181: {Means for forcing inflation fluid into the balloon}
- A61M 25/10185: {Valves}
- A61M 25/1025: {Connections between catheter tubes and inflation tubes}
- A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)}
- A61B 2018/0022: {Balloons}
- A61B 2018/00351: {Heart}
- A61B 2018/00595: {Cauterization}
- A61B 2018/046: {in liquid form}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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 balloon catheter includes a housing; a catheter shaft having a proximal end portion disposed in the housing and forming a liquid feeding path communicating with an inside of a balloon attached to a distal end portion; a supply-discharge line connection portion which has an internal space communicating with the liquid feeding path, and to which a supply-discharge line that supplies and discharges liquid to and from the liquid feeding path through the internal space can be connected; and a stopcock capable of closing the internal space of the supply-discharge line connection portion. A position of the supply-discharge line connection portion with respect to the housing is fixed.

## Claims

### Claim at position 1

1-8. (canceled)

### Claim 9

A balloon catheter comprising:
a housing;
a catheter shaft having a proximal end portion disposed in the housing and forming a liquid feeding path communicating with an inside of a balloon attached to a distal end portion of the catheter shaft;
a supply-discharge line connection portion having an internal space communicating with the liquid feeding path, and to which a supply-discharge line that supplies and discharges liquid to and from the liquid feeding path through the internal space can be connected; and
a valve capable of closing the internal space of the supply-discharge line connection portion,
wherein a position of the supply-discharge line connection portion with respect to the housing is fixed.

### Claim 10 (depends on 9)

The balloon catheter according to claim 9, further comprising:
a supply-discharge device connected to the supply-discharge line to supply and discharge liquid to and from the supply-discharge line,
wherein the supply-discharge line includes a soft tube having a length of 200 mm or more, and
the supply-discharge line is connected to the supply-discharge line connection portion.

### Claim 11 (depends on 9)

The balloon catheter according to claim 9, further comprising:
a stirring line connection portion having an internal space communicating with the liquid feeding path, and to which a stirring line that sucks and discharges liquid from and into the liquid feeding path through the internal space of the stirring line connection portion to stir liquid in the balloon can be connected,
wherein a connection portion between the internal space of the stirring line connection portion and the liquid feeding path is located closer to the distal end portion of the catheter shaft than a connection portion between the internal space of the supply-discharge line connection portion and the liquid feeding path.

### Claim 12 (depends on 9)

The balloon catheter according to claim 9,
wherein the catheter shaft includes an inner cylinder shaft to which a distal end of the balloon is fixed and an outer cylinder shaft to which a proximal end of the balloon is fixed, the outer cylinder shaft having a lumen into which the inner cylinder shaft is inserted to form the liquid feeding path between the outer cylinder shaft and the inner cylinder shaft, and
the housing is provided with an operation unit that extends the balloon by moving the inner cylinder shaft relative to the outer cylinder shaft along a first direction in which the proximal end portion of the catheter shaft extends.

### Claim 13 (depends on 9)

The balloon catheter according to claim 9, wherein the housing includes a narrow portion narrowed in a direction intersecting a first direction in which the proximal end portion of the catheter shaft extends, a first gripping portion connected to the narrow portion from one side in the first direction, and a second gripping portion connected to the narrow portion from the other side in the first direction.

### Claim 14 (depends on 13)

The balloon catheter according to claim 13,
wherein the catheter shaft includes an inner cylinder shaft to which a distal end of the balloon is fixed and an outer cylinder shaft to which a proximal end of the balloon is fixed, the outer cylinder shaft having a lumen into which the inner cylinder shaft is inserted to form the liquid feeding path between the outer cylinder shaft and the inner cylinder shaft,
a maximum outer radius of the first gripping portion about an axis extending along the first direction is larger than a maximum outer radius of the second gripping portion about an axis extending along the first direction, and
the first gripping portion is provided with an operation unit that moves the inner cylinder shaft relative to the outer cylinder shaft along the first direction to extend the balloon.

### Claim 15

A balloon catheter comprising:
a housing; and
a catheter shaft having a proximal end portion disposed in the housing and forming a liquid feeding path communicating with an inside of a balloon attached to a distal end portion of the catheter shaft,
wherein the housing includes a narrow portion narrowed in a direction intersecting a first direction in which the proximal end portion of the catheter shaft extends, a first gripping portion connected to the narrow portion from one side in the first direction, and a second gripping portion connected to the narrow portion from the other side in the first direction.

### Claim 16

A balloon catheter comprising:
a housing;
a catheter shaft having a proximal end portion disposed in the housing and forming a liquid feeding path communicating with an inside of a balloon attached to a distal end portion of the catheter shaft;
a supply-discharge line connection portion having an internal space communicating with the liquid feeding path, and to which a supply-discharge line that supplies and discharges liquid to and from the liquid feeding path through the internal space of the supply-discharge line connection portion can be connected; and
a stirring line connection portion having an internal space communicating with the liquid feeding path, and to which a stirring line that sucks and discharges liquid from and into the liquid feeding path through the internal space of the stirring line connection portion to stir liquid in the balloon can be connected,
wherein a connection portion between the internal space of the stirring line connection portion and the liquid feeding path is located closer to the distal end portion of the catheter than a connection portion between the internal space of the supply-discharge line connection portion and the liquid feeding path.