JP2018007873A5

JP2018007873A5 -

Info

Publication number: JP2018007873A5
Application number: JP2016139386A
Authority: JP
Filing date: 2016-07-14
Publication date: 2018-08-16
Anticipated expiration: 2036-07-14

Description

（１）本発明のバルーンカテーテルは、アウターチューブと、
拡張収縮するバルーン部の両端にネック部を有してなり、前記アウターチューブの先端部に基端側のネック部が固定されているバルーンと、
前記アウターチューブのルーメンおよび前記バルーンの内部に挿通されてガイドワイヤルーメンを形成し、前記バルーンの先端側ネック部に固定されている先端部を有するインナーチューブと、
前記バルーンの先端側ネック部に固定されている基端部を有し、前記インナーチューブのルーメンに連通するルーメンを形成し、その先端が開口している軟質チューブ材料からなる先端チップとを備えてなり；
前記バルーンの先端側ネック部は、第１外径（Ｄ１）および第１内径（ｄ１）を有する基端部と、前記第１内径（ｄ１）より小さな第２内径（ｄ２）を有する先端部と、前記基端部と前記先端部との境界に形成される段差部とを有し；
前記インナーチューブの先端部は、その先端面と前記先端側ネック部の段差部とが溶着、接着または当接された状態で、その外周面と前記先端側ネック部の基端部の内周面とが溶着または接着されることにより、前記先端側ネック部の基端部に固定され、
前記先端チップの基端部は、前記先端側ネック部の先端部に溶着されることにより固定され、
前記先端側ネック部の先端部は、前記第１外径（Ｄ１）を最大外径とし、第２外径（Ｄ２）を最小外径として先端方向に外径が縮小するテーパ部分を有し、
前記先端チップの基端部は、前記第１外径（Ｄ１）と略同一の内径を最大内径とし、前記第２外径（Ｄ２）と略同一の内径を最小内径として先端方向に内径が縮小するテーパ部分を有し、
前記先端チップの基端部の内周面と前記先端側ネック部の先端部の外周面とが溶着されることにより、前記先端チップの基端部が、前記先端側ネック部の先端部に固定されていることを特徴とする。 (1) The balloon catheter of the present invention comprises an outer tube,
A balloon having neck portions at both ends of a balloon portion that expands and contracts, and a proximal neck portion fixed to the distal end portion of the outer tube; and
An inner tube having a distal end portion that is inserted into the lumen of the outer tube and the balloon to form a guide wire lumen, and is fixed to the distal end side neck portion of the balloon;
A distal end tip made of a soft tube material having a proximal end portion fixed to the distal end neck portion of the balloon, forming a lumen communicating with the lumen of the inner tube, and having an opening at the distal end thereof; Become;
The distal neck portion of the balloon includes a proximal end portion having a first outer diameter (D1) and a first inner diameter (d1), and a distal end portion having a second inner diameter (d2) smaller than the first inner diameter (d1). A step portion formed at a boundary between the base end portion and the tip end portion;
The distal end portion of the inner tube has an outer peripheral surface thereof and an inner peripheral surface of the proximal end portion of the distal end side neck portion in a state where the distal end surface and the stepped portion of the distal end side neck portion are welded, bonded, or abutted. Is fixed to the proximal end of the distal end side neck portion by being welded or bonded,
The proximal end portion of the distal tip is fixed by being welded to the distal end portion of the distal neck portion,
The distal end portion of the distal neck portion has a tapered portion in which the first outer diameter (D1) is the maximum outer diameter and the second outer diameter (D2) is the minimum outer diameter, and the outer diameter decreases in the distal direction.
The proximal end portion of the tip has a maximum inner diameter substantially the same as the first outer diameter (D1) and a minimum inner diameter substantially the same as the second outer diameter (D2). Having a tapered portion
The proximal end portion of the distal end tip is fixed to the distal end portion of the distal end side neck portion by welding the inner peripheral surface of the proximal end portion of the distal end tip and the outer peripheral surface of the distal end portion of the distal end side neck portion. It is characterized by being.

また、このような構成のバルーンカテーテルによれば、先端側ネック部の先端部と先端チップの基端部との溶着部分における硬度を軸方向に連続的に変化させることができ、当該溶着部分におけるキンクも確実に防止することができる。 Further , according to the balloon catheter having such a configuration, the hardness in the welded portion between the distal end portion of the distal end side neck portion and the proximal end portion of the distal end tip can be continuously changed in the axial direction. Kink can also be reliably prevented.

（２）本発明のバルーンカテーテルにおいて、前記インナーチューブがＰＥＥＫ樹脂により構成されることが好ましい。 (2) In the balloon catheter of the present invention, it is preferable that the inner tube is made of PEEK resin.

（３）本発明のバルーンカテーテルは、前記アウターチューブの基端に接続された金属チューブと、前記金属チューブの基端に接続されたハブとを備えてなり、ＰＴＣＡ（経皮的冠動脈形成術）に使用されることが好ましい。 (3) The balloon catheter of the present invention comprises a metal tube connected to the proximal end of the outer tube and a hub connected to the proximal end of the metal tube, and is a PTCA (percutaneous coronary angioplasty). It is preferable to be used for.

（４）本発明のバルーンカテーテルは、前記アウターチューブの基端に接続されたハブを備えてなり、末梢ＰＴＡ（経皮的血管形成術）に使用されることが好ましい。 (4) The balloon catheter of the present invention preferably comprises a hub connected to the proximal end of the outer tube and is used for peripheral PTA (percutaneous angioplasty).

Claims

An outer tube,
A balloon having neck portions at both ends of the balloon portion that expands and contracts, and a proximal neck portion fixed to the distal end portion of the outer tube;
An inner tube having a distal end portion that is inserted into the lumen of the outer tube and the balloon to form a guide wire lumen, and is fixed to the distal end side neck portion of the balloon;
A distal end tip made of a soft tube material having a proximal end portion fixed to the distal end neck portion of the balloon, forming a lumen communicating with the lumen of the inner tube, and having an opening at the distal end thereof; Become;
The distal neck portion of the balloon includes a proximal end portion having a first outer diameter (D1) and a first inner diameter (d1), and a distal end portion having a second inner diameter (d2) smaller than the first inner diameter (d1). A step portion formed at a boundary between the base end portion and the tip end portion;
The distal end portion of the inner tube has an outer peripheral surface thereof and an inner peripheral surface of the proximal end portion of the distal end side neck portion in a state where the distal end surface and the stepped portion of the distal end side neck portion are welded, bonded, or abutted. Is fixed to the proximal end of the distal end side neck portion by being welded or bonded,
The proximal end portion of the distal tip is fixed by being welded to the distal end portion of the distal neck portion ,
The distal end portion of the distal neck portion has a tapered portion in which the first outer diameter (D1) is the maximum outer diameter and the second outer diameter (D2) is the minimum outer diameter, and the outer diameter decreases in the distal direction.
The proximal end portion of the tip has a maximum inner diameter substantially the same as the first outer diameter (D1) and a minimum inner diameter substantially the same as the second outer diameter (D2). Having a tapered portion
The proximal end portion of the distal end tip is fixed to the distal end portion of the distal end side neck portion by welding the inner peripheral surface of the proximal end portion of the distal end tip and the outer peripheral surface of the distal end portion of the distal end side neck portion. The balloon catheter characterized by the above-mentioned.

The balloon catheter according to claim 1, wherein the inner tube is made of PEEK resin.

Wherein a metal tube connected to the proximal end of the outer tube, it comprises a hub connected to the proximal end of the metal tube, PTCA to claim 1 or 2 is used (percutaneous transluminal coronary angioplasty) The balloon catheter described .

The balloon catheter according to claim 1 or 2 , comprising a hub connected to a proximal end of the outer tube and used for peripheral PTA (percutaneous angioplasty).