JP5131795B2 - Balloon catheter - Google Patents
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- JP5131795B2 JP5131795B2 JP2001163601A JP2001163601A JP5131795B2 JP 5131795 B2 JP5131795 B2 JP 5131795B2 JP 2001163601 A JP2001163601 A JP 2001163601A JP 2001163601 A JP2001163601 A JP 2001163601A JP 5131795 B2 JP5131795 B2 JP 5131795B2
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- guide wire
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Description
【0001】
【発明の属する技術分野】
本発明は例えばPTCA(経皮的冠動脈形成術)等で使用されるバルーンカテーテルのガイドワイヤー誘導ルーメンの改良に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
バルーンカテーテルを血管内に挿入し、ガイドワイヤー誘導ルーメンにガイドワイヤー(GW)を挿入する。
前記バルーンカテーテルを血管狭窄部にスムーズに配置する為に、バルーンの外周に親水性のポリマーをコーティングしたり、またGWの動きを良くする為にガイドワイヤー誘導ルーメンの内周面に滑りを良くする為の電解処置を施していた。
前記バルーンカテーテルのバルーンを血管内の狭窄部に配置し、バルーンを拡張させ狭窄部を拡張する。従来ガイドワイヤー誘導ルーメンの外周は前記バルーンを拡張する流体圧力に押圧されるのでこれに耐えうる硬い材質として、例えばポリアミド系やポリオレフィン系やポリイミド系の材質で形成されていた。
しかし前記のような硬い材質では、前記で述べたように、バルーンの配置やガイドワイヤーの動きをスムーズに行う為のコーティングが押圧力で勢いあまって滑ってしまい血管の狭窄部の位置からずれてしまうことが懸念される。
そこで本発明者は以上の課題を解決する為に鋭意検討を重ねた結果次の発明に達した。
【0003】
【課題を解決するための手段】
[1]本発明は、チューブ(3)と、ガイドワイヤー(GW)を挿入するガイドワイヤーチューブ(2GT)と、バルーン(4)とを有し、
前記チューブ(3)と、前記ガイドワイヤーチューブ(2GT)と、前記バルーン(4)とは、それぞれ長手方向と、当該長手方向と略垂直に交わる側部方向とを有し、
前記チューブ(3)と、前記ガイドワイヤーチューブ(2GT)と、前記バルーン(4)とは、それぞれ前記長手方向の前方側に遠位端を有し、かつ前記長手方向の後方側に近位端を有し、
前記チューブ(3)の遠位端側と前記バルーン(4)の近位端側とを、近位側接着部(4a)を介して装着し、
前記バルーン(4)の遠位端側と前記ガイドワイヤーチューブ(2GT)の遠位端側とを、遠位側接着部(4b)を介して装着し、
前記チューブ(3)の遠位端側内腔に、前記ガイドワイヤーチューブ(2GT)を配置し、当該ガイドワイヤーチューブ(2GT)は、内腔にガイドワイヤー誘導ルーメン(2)を有し、
当該ガイドワイヤー誘導ルーメン(2)は、先端開口部(2OF)と、後端開口部(2OB)とを有し、
前記先端開口部(2OF)は、前記バルーン(4)の内腔を経て前記バルーン(4)の遠位端側に配置され、
前記後端開口部(2OB)は、前記チューブ(3)の遠位端側内腔を経て当該チューブ(3)の遠位端側寄りの側部に配置され、
前記ガイドワイヤーチューブ(2GT)は、遠位端側の前方部(2TF)と、近位端側の後方部(2TB)とを有し、
前記ガイドワイヤーチューブ(2GT)は、前記ガイドワイヤー誘導ルーメン(2)の先端開口部(2OF)から前記後端開口部(2OB)の近傍にわたって、連続して略同一径に形成し、
前記ガイドワイヤーチューブ(2GT)の前記前方部(2TF)は、前記後方部(2TB)よりも弾性力が強く且つ復元力が高い材質で形成し、当該後方部(2TB)は前記前方部(2TF)よりも硬い材質で形成し、
前記ガイドワイヤーチューブ(2GT)の前記前方部(2TF)と前記後方部(2TB)とを、前記近位側接着部(4a)近傍で接続し、
前記ガイドワイヤーチューブ(2GT)の前方部(2TF)を、前記近位側接着部(4a)と前記遠位側接着部(4b)との間に配置し、前記バルーン(4)の近位端から当該バルーン(4)の内部を経て当該バルーン(4)の遠位端まで延設して、当該バルーン(4)の内部全域にわたって形成し、
前記ガイドワイヤーチューブ(2GT)の遠位端側と、前記バルーン(4)の遠位端側との接着部(4b)より、さらに遠位端側に、前記前方部(2TF)の遠位端側の先端部(7)を突設し、当該先端部(7)を前記後方部(2TB)と同様に前記前方部(2TF)よりも硬い材質で形成したバルーンカテーテル(1)を提供する。
[2]本発明は、前記ガイドワイヤーチューブ(2GT)の前方部(2TF)はポリウレタン系の材質で形成し、前記後方部(2TB)はポリアミド系またはポリオレフィン系またはポリイミド系の中から選ばれる材質で形成した[1]に記載のバルーンカテーテル(1)を提供する。
【0004】
【発明の実施の形態】
図1は本発明のバルーンカテーテル1の断面図である。
前記バルーンカテーテル(以後「カテーテル」と略記する)1は、チューブ3と、ガイドワイヤーGWを挿入するガイドワイヤーチューブ2GTと、バルーン4とを有する。
チューブ3と、ガイドワイヤーチューブ2GTと、バルーン4とは、それぞれ長手方向と、当該長手方向と略垂直に交わる側部方向とを有する。チューブ3と、ガイドワイヤーチューブ2GTと、バルーン4とは、それぞれ長手方向の前方側に遠位端を有し、かつ長手方向の後方側に近位端を有する。
チューブ3の遠位端側とバルーン4の近位端側とを、近位側接着部4aを介して装着し、バルーン4の遠位端側とガイドワイヤーチューブ2GTの遠位端側とを、遠位側接着部4bを介して装着している。
チューブ3の遠位側内腔に、ガイドワイヤーチューブ2GTを配置し、当該ガイドワイヤーチューブ2GTは、内腔にガイドワイヤー誘導ルーメン2を有する。
ガイドワイヤー誘導ルーメン2は、先端開口部2OFと、後端開口部2OBとを有し、先端開口部2OFは、バルーン4の内腔を経て前記バルーン4の遠位端に配置され、後端開口部2OBは、チューブ3の遠位側内腔を経て当該チューブ3の遠位側寄りの側部に配置されている。
ガイドワイヤーチューブ2GTは、遠位端側の前方部2TFと、近位端側の後方部2TBとを有し、ガイドワイヤーチューブ2GTは、ガイドワイヤー誘導ルーメン2先端開口部2OFから後端開口部2OBの近傍にわたって、連続して略同一径に形成している。
ガイドワイヤーチューブ2GTの前方部2TFは、後方部2TBよりも弾性力が強く且つ復元力が高い材質で形成し、後方部2TBは前方部2TFよりも硬い材質で形成している。
ガイドワイヤーチューブ2GTの前方部2TFと後方部2TBとを、近位側接着部4a近傍で接続部5を介して接続し、ガイドワイヤーチューブ2GTの前方部2TFを、近位側接着部4aと遠位側接着部4bとの間に配置している。
換言すれば、ガイドワイヤーチューブ2GTの前記前方部2TFは、バルーン4の遠位端側から近位端側に亘って形成している。
【0005】
前記ガイドワイヤーチューブ2GTの前方部2TFを後方部2TBより弾性力が強く且つ復元力が強い材質を接続することで、「バルーン4を拡張する流体圧力とガイドワイヤーGWのグリップ効果」により、バルーン4の滑りによる狭窄部からの位置ずれを防止することができる。
前記「バルーン4を拡張する流体圧力とガイドワイヤーGWのグリップ効果」とは具体的に、ガイドワイヤーGWを挿入したカテーテル1のバルーン4を血管内の狭窄部で拡張した時、ガイドワイヤーチューブ2GTの前方部2TFは弾力性があり、バルーン4を拡張する流体圧力とガイドワイヤーGWにより外周からの押圧力が適宜吸収、緩和されるのでこれらの押圧力により、従来のように勢いあまって血管の狭窄部の位置からすべることを防止することができ、前方部2TFを適度に滑らないように挟持することができる。
従ってバルーン4の位置がずれることなく血管壁の狭窄部に安定して固定することができる。
さらに前記挟持された前方部2TFに高い復元力を兼ねることで、拡張したバルーン4を減圧してバルーン4を移動させる時、前記前方部2TFが元の形状に戻るのでガイドワイヤーGWの動きがスムーズになる。
【0006】
前方部2TFは例えばポリウレタン系の材質(一例としてポリウレタンエーテルウレア等)、またこれと同等の弾力性があり且つ復元力が高い材質を使用することができる。
前記後方部2TBは例えばポリアミド系またはポリオレフィン系またはポリイミド系等の中から選ばれる硬い材質、またこれらと同等の硬い材質を使用することができる。
バルーンカテーテル1の先端の動きを誘導しやすくする為に、ガイドワイヤーチューブ2GTの遠位端側と、バルーン4の遠位端側との遠位側接着部4bより、さらに遠位端側に、前方部2TFの遠位端側の先端部7を突設し、当該先端部7を前記後方部2TBと同様に前方部2TFよりも硬い材質で形成している。
ガイドワイヤーチューブ2GTの前方部2TFと後方部2TBとの接続は、遠位チューブ3の先端から近位側接着部4aの間、または近位側接続部4aから後端開口部(ガイドワイヤー挿入口)2OBの間で行ってもよいが、より好ましくは近位側接着部4a後端またはこの前後で接続するのが望ましい。換言すればガイドワイヤーチューブ2GTの前方部2TFと後方部2TBとを、近位側接着部4a近傍で接続部5を介して接続するのが好ましい。
なお前記接続部5をバルーン4内に形成すると、前方部2FTの材質による弾性力並びに復元力の効果が薄れるので好ましくない。
【0008】
【発明の作用効果】
本発明のバルーンカテーテル1に装着したガイドワイヤーチューブ2GT(ガイドワイヤー誘導ルーメン2)を前方部2TFと後方部2TBより形成し、前記前方部2TFは後方部2TBより弾性力が強く且つ復元力の高い材質を用いることで、バルーン4を拡張する際の流体の圧力とガイドワイヤーGWにより前方部2FTを挟持する「バルーン4を拡張する流体圧力とガイドワイヤーGWのグリップ効果」を高めることができバルーン4の拡張位置のずれをなくすとともに、バルーン4を減圧した後、前方部2TFの形状が復元しガイドワイヤーGWの操作性をスムーズにすることができる。
【図面の簡単な説明】
【図1】本発明のバルーンカテーテル1の断面図
【符号の説明】
1 バルーンカテーテル
2 ガイドワイヤー誘導ルーメン
2GT ガイドワイヤーチューブ
2TF 前方部
2TB 後方部
2OF 先端開口部
2OB 後端開口部(ガイドワイヤー挿入口)
3 チューブ
4 バルーン
4a 近位側接着部
4b 遠位側接着部
5 接続部
7 先端部
GW ガイドワイヤー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a guide wire guiding lumen of a balloon catheter used in, for example, PTCA (percutaneous coronary angioplasty).
[0002]
[Prior art and problems to be solved by the invention]
A balloon catheter is inserted into the blood vessel, and a guide wire (GW) is inserted into the guide wire guide lumen.
In order to smoothly place the balloon catheter in the stenosis of the blood vessel, the outer periphery of the balloon is coated with a hydrophilic polymer, and in order to improve the movement of the GW, the inner peripheral surface of the guide wire guide lumen is made slippery. Electrolytic treatment was performed.
The balloon of the balloon catheter is placed in a stenosis in the blood vessel, and the balloon is expanded to expand the stenosis. Conventionally, since the outer periphery of the guide wire guide lumen is pressed by the fluid pressure that expands the balloon, it has been formed of, for example, a polyamide, polyolefin, or polyimide material as a hard material that can withstand this.
However, in the hard material as described above, as described above, the coating for smoothly moving the balloon and the guide wire moves with the pressing force and slips away from the position of the narrowed portion of the blood vessel. There is a concern that
Therefore, the present inventor has intensively studied in order to solve the above problems, and has reached the following invention.
[0003]
[Means for Solving the Problems]
[1] The present invention includes a tube (3), a guide wire tube (2GT) into which a guide wire (GW) is inserted, and a balloon (4).
The tube (3), the guide wire tube (2GT), and the balloon (4) each have a longitudinal direction and a side direction that intersects the longitudinal direction substantially perpendicularly.
The tube (3), the guide wire tube (2GT), and the balloon (4) each have a distal end on the front side in the longitudinal direction and a proximal end on the rear side in the longitudinal direction. Have
The distal end side of the tube (3) and the proximal end side of the balloon (4) are attached via a proximal adhesive part (4a),
A distal end side of the balloon (4) and a distal end side of the guide wire tube (2GT) are attached via a distal side adhesive portion (4b),
The guide wire tube (2GT) is arranged in the distal end side lumen of the tube (3), and the guide wire tube (2GT) has a guide wire guide lumen (2) in the lumen;
The guide wire guide lumen (2) has a front end opening (2OF) and a rear end opening (2OB),
The tip opening (2OF) is disposed on the distal end side of the balloon (4) through the lumen of the balloon (4),
The rear end opening (2OB) is disposed on the side near the distal end of the tube (3) through the distal end side lumen of the tube (3),
The guide wire tube (2GT) has a front part (2TF) on the distal end side and a rear part (2TB) on the proximal end side,
The guide wire tube (2GT) is formed to have substantially the same diameter continuously from the front end opening (2OF) of the guide wire guiding lumen (2) to the vicinity of the rear end opening (2OB),
The front portion (2TF) of the guide wire tube (2GT) is formed of a material having a stronger elastic force and higher restoring force than the rear portion (2TB), and the rear portion (2TB) is formed of the front portion (2TF). ) Made of a harder material,
The front part (2TF) and the rear part (2TB) of the guide wire tube (2GT) are connected in the vicinity of the proximal adhesive part (4a),
A front part (2TF) of the guide wire tube (2GT) is disposed between the proximal adhesive part (4a) and the distal adhesive part (4b), and the proximal end of the balloon (4) Extending from the inside of the balloon (4) to the distal end of the balloon (4) and formed over the entire interior of the balloon (4),
The distal end of the front portion (2TF) is located further to the distal end side than the adhesive portion (4b) between the distal end side of the guide wire tube (2GT) and the distal end side of the balloon (4). Provided is a balloon catheter (1) in which a distal end portion (7) on the side is protruded, and the distal end portion (7) is formed of a material harder than the front portion (2TF), similarly to the rear portion (2TB).
[2] In the present invention, the front portion (2TF) of the guide wire tube (2GT) is formed of a polyurethane material, and the rear portion (2TB) is a material selected from polyamide, polyolefin, or polyimide. The balloon catheter (1) according to [1] formed in (1) is provided.
[0004]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a sectional view of a balloon catheter 1 of the present invention.
The balloon catheter (hereinafter abbreviated as “catheter”) 1 includes a tube 3 , a guide wire tube 2 GT into which a guide wire GW is inserted, and a balloon 4.
The tube 3 , the guide wire tube 2GT, and the balloon 4 each have a longitudinal direction and a side direction that intersects the longitudinal direction substantially perpendicularly. The tube 3 , the guide wire tube 2GT, and the balloon 4 each have a distal end on the front side in the longitudinal direction and a proximal end on the rear side in the longitudinal direction.
The distal end side of the tube 3 and the proximal end side of the balloon 4 are attached via the proximal side adhesive portion 4a, and the distal end side of the balloon 4 and the distal end side of the guide wire tube 2GT are attached. It is mounted via the distal adhesive portion 4b.
A guide wire tube 2GT is disposed in the distal lumen of the tube 3 , and the guide wire tube 2GT has a guide wire guide lumen 2 in the lumen.
The guide wire guide lumen 2 has a front end opening 2OF and a rear end opening 2OB. The front end opening 2OF is disposed at the distal end of the balloon 4 through the lumen of the balloon 4, and the rear end opening is opened. part 2OB is located on the side of the distal side of the said tube 3 through the distal lumen of the tube 3.
The guide wire tube 2GT has a front portion 2TF on the distal end side and a rear portion 2TB on the proximal end side, and the guide wire tube 2GT extends from the guide wire guide lumen 2 tip opening portion 2OF to the rear end opening portion 2OB. Are continuously formed to have substantially the same diameter over the vicinity.
The front part 2TF of the guide wire tube 2GT is made of a material having a stronger elastic force and a higher restoring force than the rear part 2TB, and the rear part 2TB is made of a material harder than the front part 2TF.
The front portion 2TF and the rear portion 2TB of the guide wire tube 2GT are connected via the connecting portion 5 in the vicinity of the proximal side adhesive portion 4a, and the front portion 2TF of the guide wire tube 2GT is connected to the proximal side adhesive portion 4a. It arrange | positions between the position side adhesion parts 4b.
In other words, the front portion 2TF of the guide wire tube 2GT is formed from the distal end side to the proximal end side of the balloon 4.
[0005]
The guide wire forward section 2 TF tube 2GT by elastic force from the rear portion 2 T B is strong and restoring force to connect a stronger material, by "gripping effect of the fluid pressure and the guidewire GW to expand the balloon 4 ' In addition, it is possible to prevent displacement from the constriction due to the sliding of the balloon 4.
Specifically, the “fluid pressure to expand the balloon 4 and the grip effect of the guide wire GW” specifically means that when the balloon 4 of the catheter 1 into which the guide wire GW has been inserted is expanded at the narrowed portion in the blood vessel, the guide wire tube 2GT The front portion 2TF is elastic, and the fluid pressure for expanding the balloon 4 and the pressing force from the outer periphery are appropriately absorbed and relaxed by the guide wire GW. it is possible to prevent the slip from the position of the stenosis, it can be clamped so as not slide in moderate front portion 2 TF.
Accordingly, the balloon 4 can be stably fixed to the narrowed portion of the blood vessel wall without being displaced.
Furthermore, when the expanded balloon 4 is depressurized and the balloon 4 is moved by combining the sandwiched front part 2TF with a high restoring force, the front part 2TF returns to its original shape, so that the movement of the guide wire GW Becomes smooth.
[0006]
The front portion 2TF can be made of, for example, a polyurethane-based material (for example, polyurethane ether urea), or a material having the same elasticity and high restoring force.
The rear portion 2 TB can be made of a hard material selected from, for example, polyamide, polyolefin, polyimide, or the like, or a hard material equivalent to these.
In order to facilitate the movement of the tip of the balloon catheter 1, the distal end side of the guide wire tube 2GT and the distal side adhesive portion 4b between the distal end side of the balloon 4 and further to the distal end side, A front end portion 7 on the distal end side of the front portion 2TF is projected, and the front end portion 7 is formed of a material harder than the front portion 2TF, like the rear portion 2TB.
Guide connection between the front portion 2 TF and the rear portion 2 T B of the wire tube 2GT is between the tip of the distal tube 3 of the proximal adhesive portion 4a or rear end opening from the proximal side connecting portion 4a, (guide The wire insertion port 2OB may be performed, but it is more preferable that the connection is made at the rear end of the proximal side adhesive portion 4a or at the front and rear thereof. In other words, it is preferable to connect the front part 2TF and the rear part 2TB of the guide wire tube 2GT via the connection part 5 in the vicinity of the proximal side adhesive part 4a.
Still to form the connecting portions 5 into the balloon 4, the fade effect of the elastic force and restoring force due to the material of the front portion 2 FT undesirable.
[0008]
[Effects of the invention]
Guidewire tube 2GT mounted on the balloon catheter 1 of the present invention (guide wire induction lumen 2) formed from the front portion 2 TF and the rear portion 2 T B, the front portion 2 TF elastic force from the rear portion 2 T B is By using a material that is strong and has high restoring force, the fluid pressure when expanding the balloon 4 and the guide wire GW sandwich the front part 2 FT “the fluid pressure that expands the balloon 4 and the grip effect of the guide wire GW” together eliminate the deviation of the extended position of the can the balloon 4 be increased, after the balloon 4 under reduced pressure, it is possible to smoothly operability of restoring the shape of the front portion 2 TF guide wire GW.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a balloon catheter 1 of the present invention.
DESCRIPTION OF SYMBOLS 1 Balloon catheter 2 Guide wire guide lumen 2GT Guide wire tube 2TF Front part 2TB Rear part 2OF Front end opening 2OB Rear end opening (guide wire insertion port)
3 Tube 4 Balloon 4a Proximal side adhesion part 4b Distal side adhesion part 5 Connection part 7 Tip part GW Guide wire
Claims (2)
前記チューブ(3)と、前記ガイドワイヤーチューブ(2GT)と、前記バルーン(4)とは、それぞれ長手方向と、当該長手方向と略垂直に交わる側部方向とを有し、
前記チューブ(3)と、前記ガイドワイヤーチューブ(2GT)と、前記バルーン(4)とは、それぞれ前記長手方向の前方側に遠位端を有し、かつ前記長手方向の後方側に近位端を有し、
前記チューブ(3)の遠位端側と前記バルーン(4)の近位端側とを、近位側接着部(4a)を介して装着し、
前記バルーン(4)の遠位端側と前記ガイドワイヤーチューブ(2GT)の遠位端側とを、遠位側接着部(4b)を介して装着し、
前記チューブ(3)の遠位端側内腔に、前記ガイドワイヤーチューブ(2GT)を配置し、当該ガイドワイヤーチューブ(2GT)は、内腔にガイドワイヤー誘導ルーメン(2)を有し、
当該ガイドワイヤー誘導ルーメン(2)は、先端開口部(2OF)と、後端開口部(2OB)とを有し、
前記先端開口部(2OF)は、前記バルーン(4)の内腔を経て前記バルーン(4)の遠位端側に配置され、
前記後端開口部(2OB)は、前記チューブ(3)の遠位端側内腔を経て当該チューブ(3)の遠位端側寄りの側部に配置され、
前記ガイドワイヤーチューブ(2GT)は、遠位端側の前方部(2TF)と、近位端側の後方部(2TB)とを有し、
前記ガイドワイヤーチューブ(2GT)は、前記ガイドワイヤー誘導ルーメン(2)の先端開口部(2OF)から前記後端開口部(2OB)の近傍にわたって、連続して略同一径に形成し、
前記ガイドワイヤーチューブ(2GT)の前記前方部(2TF)は、前記後方部(2TB)よりも弾性力が強く且つ復元力が高い材質で形成し、当該後方部(2TB)は前記前方部(2TF)よりも硬い材質で形成し、
前記ガイドワイヤーチューブ(2GT)の前記前方部(2TF)と前記後方部(2TB)とを、前記近位側接着部(4a)近傍で接続し、
前記ガイドワイヤーチューブ(2GT)の前方部(2TF)を、前記近位側接着部(4a)と前記遠位側接着部(4b)との間に配置し、前記バルーン(4)の近位端から当該バルーン(4)の内部を経て当該バルーン(4)の遠位端まで延設して、当該バルーン(4)の内部全域にわたって形成し、
前記ガイドワイヤーチューブ(2GT)の遠位端側と、前記バルーン(4)の遠位端側との接着部(4b)より、さらに遠位端側に、前記前方部(2TF)の遠位端側の先端部(7)を突設し、当該先端部(7)を前記後方部(2TB)と同様に前記前方部(2TF)よりも硬い材質で形成したことを特徴とするバルーンカテーテル(1)。A tube (3), a guide wire tube (2GT) for inserting a guide wire (GW), and a balloon (4);
The tube (3), the guide wire tube (2GT), and the balloon (4) each have a longitudinal direction and a side direction that intersects the longitudinal direction substantially perpendicularly.
The tube (3), the guide wire tube (2GT), and the balloon (4) each have a distal end on the front side in the longitudinal direction and a proximal end on the rear side in the longitudinal direction. Have
The distal end side of the tube (3) and the proximal end side of the balloon (4) are attached via a proximal adhesive part (4a),
A distal end side of the balloon (4) and a distal end side of the guide wire tube (2GT) are attached via a distal side adhesive portion (4b),
The guide wire tube (2GT) is arranged in the distal end side lumen of the tube (3), and the guide wire tube (2GT) has a guide wire guide lumen (2) in the lumen;
The guide wire guide lumen (2) has a front end opening (2OF) and a rear end opening (2OB),
The tip opening (2OF) is disposed on the distal end side of the balloon (4) through the lumen of the balloon (4),
The rear end opening (2OB) is disposed on the side near the distal end of the tube (3) through the distal end side lumen of the tube (3),
The guide wire tube (2GT) has a front part (2TF) on the distal end side and a rear part (2TB) on the proximal end side,
The guide wire tube (2GT) is formed to have substantially the same diameter continuously from the front end opening (2OF) of the guide wire guiding lumen (2) to the vicinity of the rear end opening (2OB),
The front portion (2TF) of the guide wire tube (2GT) is formed of a material having a stronger elastic force and higher restoring force than the rear portion (2TB), and the rear portion (2TB) is formed of the front portion (2TF). ) Made of a harder material,
The front part (2TF) and the rear part (2TB) of the guide wire tube (2GT) are connected in the vicinity of the proximal adhesive part (4a),
A front part (2TF) of the guide wire tube (2GT) is disposed between the proximal adhesive part (4a) and the distal adhesive part (4b), and the proximal end of the balloon (4) Extending from the inside of the balloon (4) to the distal end of the balloon (4) and formed over the entire interior of the balloon (4),
The distal end of the front portion (2TF) is located further to the distal end side than the adhesive portion (4b) between the distal end side of the guide wire tube (2GT) and the distal end side of the balloon (4). A balloon catheter (1), wherein a distal end (7) on the side is protruded, and the distal end (7) is made of a material harder than the front portion (2TF), similarly to the rear portion (2TB). ).
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JP2001163601A JP5131795B2 (en) | 2001-05-31 | 2001-05-31 | Balloon catheter |
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JP2001163601A JP5131795B2 (en) | 2001-05-31 | 2001-05-31 | Balloon catheter |
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JP5131795B2 true JP5131795B2 (en) | 2013-01-30 |
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CA2560063A1 (en) * | 2004-03-17 | 2005-09-29 | Cook Incorporated | Second wire apparatus and installation procedure |
JP4492183B2 (en) * | 2004-03-31 | 2010-06-30 | 日本ゼオン株式会社 | Balloon catheter |
JP4492182B2 (en) * | 2004-03-31 | 2010-06-30 | 日本ゼオン株式会社 | Intra-aortic balloon catheter |
JPWO2022138813A1 (en) * | 2020-12-25 | 2022-06-30 |
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US4932959A (en) * | 1988-12-01 | 1990-06-12 | Advanced Cardiovascular Systems, Inc. | Vascular catheter with releasably secured guidewire |
EP0972535B1 (en) * | 1991-09-12 | 2005-12-28 | Advanced Cardiovascular Systems, Inc. | Inflatable member having elastic expansion with limited range |
JP2001029449A (en) * | 1999-07-19 | 2001-02-06 | Nippon Zeon Co Ltd | Balloon for balloon catheter and its manufacture |
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