JP2008206702A - Catheter balloon - Google Patents

Catheter balloon Download PDF

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JP2008206702A
JP2008206702A JP2007046168A JP2007046168A JP2008206702A JP 2008206702 A JP2008206702 A JP 2008206702A JP 2007046168 A JP2007046168 A JP 2007046168A JP 2007046168 A JP2007046168 A JP 2007046168A JP 2008206702 A JP2008206702 A JP 2008206702A
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balloon
expansion
catheter
end portion
support member
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Toshiaki Masuda
利明 増田
Shinji Momotani
伸ニ 桃谷
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Nipro Corp
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Nipro Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3205—Excision instruments
    • A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
    • A61B17/320725—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with radially expandable cutting or abrading elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
    • A61B2017/22061—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation for spreading elements apart

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Materials For Medical Uses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a catheter balloon which is easily positioned in a gap between a balloon and a part to be expanded in a bent region and is equipped with an expansion auxiliary member designed not to fall out when the balloon is excessively inflated to have a diameter greater than a prescribed diameter. <P>SOLUTION: In the catheter balloon 1 having the expansion auxiliary member 4 for expanding a narrowed region on the outer surface of the balloon 3, the expansion auxiliary member is extended from the proximal end part of the balloon to the distal end part. One end of the expansion auxiliary member is fixed on a first supporting member 5 provided on the proximal end part, and the other end side of the expansion auxiliary member is kept to be slidable at a second supporting member 6 provided on the distal end part. The other end of the expansion auxiliary member is protruded from the second supporting member. Consequently, the catheter balloon 1 is constituted to provide the expansion auxiliary member 4 from the proximal end part to the distal end part of the balloon when the balloon 3 is inflated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、カテーテル用バルーンに関し、特に、強固病変部においてもバルーン部を容易に膨張可能とするカテーテル用バルーンに関するものである。   The present invention relates to a balloon for a catheter, and more particularly to a balloon for a catheter that allows the balloon to be easily inflated even in a strong lesion.

従来、患者の血管の閉塞や狭窄を治療する医療器具として、血管内に挿入して膨張させて血管を拡張するバルーンを有する拡張用バルーンカテーテルが知られている。また、このバルーンの望ましいサイズおよび物理的特性は、患者の血管の大きさやバルーンの用途によって異なっている。
また、従来の拡張用バルーンカテーテルで拡張が困難な場合、バルーンと被拡張部との間にワイヤなどを挿入したり、バルーン外面に切刃を具備したりして拡張率を向上させることが行われている。さらに、バルーン外面に設けた切刃を振動させることで拡張効果を高めるバルーンカテーテルが既に提案されている（例えば、特許文献１参照）。 2. Description of the Related Art Conventionally, as a medical device for treating occlusion or stenosis of a patient's blood vessel, an expansion balloon catheter having a balloon that is inserted into a blood vessel and expanded to expand the blood vessel is known. Also, the desired size and physical properties of the balloon vary depending on the size of the patient's blood vessel and the balloon application.
If expansion is difficult with a conventional balloon catheter for expansion, the expansion rate can be improved by inserting a wire or the like between the balloon and the portion to be expanded or by providing a cutting blade on the outer surface of the balloon. It has been broken. Furthermore, a balloon catheter that enhances the expansion effect by vibrating a cutting blade provided on the outer surface of the balloon has already been proposed (see, for example, Patent Document 1).

特開平７−６７９６７号公報JP-A-7-67967

しかし、バルーン外面に切刃を装着しただけの構成では、予め定められた径に対して有効であって、規定の径よりも過度に膨張した場合には、切刃が脱落する虞が生じる。
また、屈曲した部位においても、単にバルーン外面に切刃を装着した構成では対応が困難となる。
本発明の目的は、上記問題を解決するために、屈曲した部位においても、バルーンと被拡張部との間隙に容易に位置すると共に、バルーンが規定の径よりも過度に膨張した場合にも脱落しない拡張補助部材を備えるカテーテル用バルーンを提供することである。 However, in the configuration in which the cutting blade is simply mounted on the outer surface of the balloon, it is effective for a predetermined diameter, and the cutting blade may fall off when it expands excessively beyond a predetermined diameter.
Further, even in a bent portion, it is difficult to cope with a configuration in which a cutting blade is simply mounted on the outer surface of the balloon.
An object of the present invention is to solve the above-mentioned problem, even in a bent portion, it is easily located in the gap between the balloon and the expanded portion, and falls off even when the balloon is inflated excessively beyond a prescribed diameter. It is to provide a balloon for a catheter provided with a non-expanding auxiliary member.

上記の目的を達成するために請求項１に係る発明は、バルーン外面に狭窄部位を拡張するための拡張補助部材を有するカテーテル用バルーンであって、前記拡張補助部材をバルーンの基端部から先端部まで延設すると共に、前記基端部に設ける第一支持部材と、前記先端部に設ける第二支持部材とで、前記拡張補助部材を摺動自在に保持すると共に、前記拡張補助部材の端部を前記第一および第二支持部材の少なくとも一方から突出させて、バルーンが膨張しても前記拡張補助部材がバルーンの基端部から先端部まで配設される構成としたことを特徴としている。   In order to achieve the above object, the invention according to claim 1 is a balloon for a catheter having an expansion assisting member for expanding a stenosis site on the outer surface of the balloon, wherein the expansion assisting member is extended from the proximal end portion of the balloon to the distal end. The expansion support member is slidably held by a first support member provided at the base end portion and a second support member provided at the distal end portion, and an end of the expansion support member. A portion is projected from at least one of the first and second support members, and the expansion assisting member is arranged from the proximal end portion to the distal end portion of the balloon even when the balloon is inflated. .

上記の構成を有する請求項１に係る発明によれば、バルーン外面に装着する拡張補助部材を第一および第二支持部材を介してスライド自在に保持するので、血管内でバルーンが膨張・収縮を繰り返しても、その変位に容易に追随して、常時前記拡張補助部材がバルーンの基端部から先端部まで配設され、拡張補助部材が脱落することがない。   According to the invention according to claim 1 having the above-described configuration, the expansion assisting member to be mounted on the outer surface of the balloon is slidably held via the first and second support members, so that the balloon is inflated and deflated within the blood vessel. Even if it repeats, the expansion assisting member follows the displacement easily, and the expansion assisting member is always arranged from the base end portion to the distal end portion of the balloon, and the expansion assisting member does not fall off.

請求項２に係る発明は、前記第一支持部材に前記拡張補助部材の一端を固定し、前記先端部に設ける第二支持部材に前記拡張補助部材の他端側を摺動自在に保持すると共に、前記拡張補助部材の他端を前記第二支持部材から突出させたことを特徴としている。
上記の構成を有する請求項２に係る発明によれば、バルーン外面に装着する拡張補助部材の一端を第一支持部材で保持し、他端を第二支持部材がスライド自在に保持するので、血管内で膨張・収縮を繰り返しても、拡張補助部材が脱落することがない。 According to a second aspect of the invention, one end of the expansion auxiliary member is fixed to the first support member, and the other end side of the expansion auxiliary member is slidably held by a second support member provided at the tip portion. The other end of the expansion auxiliary member is protruded from the second support member.
According to the invention of claim 2 having the above-described configuration, one end of the expansion assisting member to be mounted on the outer surface of the balloon is held by the first support member, and the other end is slidably held by the second support member. Even if expansion and contraction are repeated in the inside, the expansion assisting member does not fall off.

請求項３に係る発明は、前記拡張補助部材を、鋭利に研磨された切先部を有する弾性変形可能なワイヤ製とし、前記第二支持部材に、前記ワイヤが前記切先部を外面に向けて挿通自在となる挿通孔を設けたことを特徴としている。
上記の構成を有する請求項３に係る発明によれば、弾性変形するワイヤ部材を用いることで、バルーンの膨張・収縮に容易に追従する拡張補助部材を得ることができる。また、鋭利に研磨された切先部で強固病変部をも確実に拡張可能となる。さらに、第二支持部材の挿通孔によりガイドされるので、バルーンの膨張・収縮に応じて確実にスライドすることができる。 According to a third aspect of the present invention, the expansion assisting member is made of an elastically deformable wire having a sharply polished cut-out portion, and the wire faces the cut-out portion toward the outer surface of the second support member. It is characterized by providing an insertion hole that can be inserted through.
According to the invention of claim 3 having the above-described configuration, an expansion assisting member that easily follows the inflation / deflation of the balloon can be obtained by using the wire member that is elastically deformed. In addition, it is possible to reliably expand a strong lesioned portion with a sharply polished notch portion. Furthermore, since it is guided by the insertion hole of the second support member, it can be reliably slid according to the inflation / deflation of the balloon.

請求項４に係る発明は、前記拡張補助部材がニッケル・チタン合金製であることを特徴としている。
上記の構成を有する請求項４に係る発明によれば、金属製であるので、狭窄血管を確実に拡げることができ、さらに所定の形状を維持する形状記憶合金となるので、バルーン収縮時には、確実に収縮する拡張補助部材を形成することができる。 The invention according to claim 4 is characterized in that the expansion auxiliary member is made of a nickel-titanium alloy.
According to the invention according to claim 4 having the above-described configuration, since it is made of metal, a stenotic blood vessel can be reliably expanded, and a shape memory alloy that maintains a predetermined shape is obtained. It is possible to form an expansion assisting member that contracts.

請求項５に係る発明は、前記第二支持部材を環状とし、前記挿通孔を円周上に等配して４個設け、バルーン外面に４本の前記拡張補助部材を等配して設ける構成としたことを特徴としている。
上記の構成を有する請求項５に係る発明によれば、狭窄血管の内部を均等に拡張することができる。また、それぞれの拡張補助部材が独立してスライド自在なので、屈曲した部位においても使用可能なバルーンカテーテルとなる。 The invention according to claim 5 is a configuration in which the second support member is annular, the four insertion holes are equally arranged on the circumference, and the four expansion auxiliary members are equally arranged on the outer surface of the balloon. It is characterized by that.
According to the invention which concerns on Claim 5 which has said structure, the inside of a stenosis blood vessel can be expanded equally. In addition, since each expansion assisting member is slidable independently, the balloon catheter can be used even in a bent portion.

請求項６に係る発明は、前記第二支持部材の後方に該第二支持部材と前記拡張補助部材の他端を一体的に被覆する保護カバーを装着したことを特徴としている。
上記の構成を有する請求項６に係る発明によれば、血管内を安全に挿通可能な拡張補助部材を装着したバルーンカテーテルとなり、治療後の引き抜き時にも、血管内壁を傷付けることがない。 The invention according to claim 6 is characterized in that a protective cover for integrally covering the second support member and the other end of the expansion assisting member is mounted behind the second support member.
According to the invention concerning Claim 6 which has said structure, it becomes a balloon catheter equipped with the expansion | extension auxiliary member which can be safely inserted in the inside of a blood vessel, and does not damage the blood vessel inner wall also at the time of extraction after treatment.

請求項７に係る発明は、前記記載のカテーテル用バルーンと、カテーテルチューブとを含むバルーンカテーテルを特徴としている。 The invention according to claim 7 is characterized by a balloon catheter including the catheter balloon described above and a catheter tube.

本発明によれば、拡張補助部材をバルーンの基端部から先端部まで延設して、基端部に設ける第一支持部材と先端部に設ける第二支持部材とで前記拡張補助部材を摺動自在に保持する構成とし、バルーンが膨張しても前記拡張補助部材がバルーンの基端部から先端部まで配設される構成としたので、屈曲した部位においても、バルーンと被拡張部との間隙に位置してバルーンの膨張と収縮に容易に追従すると共に、バルーンが規定の径よりも過度に膨張した場合にも脱落しない拡張補助部材を備えるカテーテル用バルーンを得ることができる。   According to the present invention, the expansion assisting member is extended from the proximal end portion to the distal end portion of the balloon, and the expansion assisting member is slid by the first support member provided at the proximal end portion and the second support member provided at the distal end portion. Even if the balloon is inflated, the expansion assisting member is disposed from the proximal end portion to the distal end portion of the balloon. It is possible to obtain a catheter balloon including an expansion assisting member that is positioned in the gap and easily follows expansion and contraction of the balloon and that does not fall off even when the balloon is inflated more than a predetermined diameter.

以下、本発明に係るカテーテル用バルーンの実施の形態について、図面に基づいて詳細に説明する。
図１は、本発明に係るカテーテル用バルーン１の概略説明図であり、（ａ）にはバルーンが収縮した状態を示し、（ｂ）にはバルーンが膨張した状態を示している。 Hereinafter, embodiments of a catheter balloon according to the present invention will be described in detail with reference to the drawings.
1A and 1B are schematic explanatory views of a balloon 1 for a catheter according to the present invention. FIG. 1A shows a state in which the balloon is deflated, and FIG. 1B shows a state in which the balloon is inflated.

図１（ａ）に示すように、本発明に係るカテーテル用バルーン１は、カテーテルチューブ２にバルーンを備えた構成であり、バルーン３の基端部に設ける第一支持部材５と、先端部に設ける第二支持部材６を介して拡張補助部材４を装着している。これらの第一支持部材５と第二支持部材６とは、共に環状の剛体製（例えば金属製）とされている。よって、カテーテル用バルーン１と、カテーテルチューブ２とを含む構成のバルーンカテーテルとなる。   As shown in FIG. 1 (a), a catheter balloon 1 according to the present invention has a structure in which a balloon is provided on a catheter tube 2, and includes a first support member 5 provided at a proximal end portion of the balloon 3 and a distal end portion. The expansion assisting member 4 is mounted via the second support member 6 provided. The first support member 5 and the second support member 6 are both made of an annular rigid body (for example, made of metal). Therefore, the balloon catheter is configured to include the catheter balloon 1 and the catheter tube 2.

拡張補助部材４は、前記第一支持部材５と前記第二支持部材６とで摺動自在に保持されていることが好ましい。この構成であれば、バルーン３が膨張しても前記拡張補助部材４がバルーン３から脱落することなく、バルーンの基端部から先端部まで配設される構成となり好適である。
本実施の形態においては、前記拡張補助部材４の一端を前記第一支持部材５に固定し、他端側を、前記第二支持部材６により摺動自在に保持する構成としている。また、前記拡張補助部材４の他端側の先端４ａは前記第二支持部材６から外側に突出した長さとされている。 The expansion auxiliary member 4 is preferably slidably held between the first support member 5 and the second support member 6. This configuration is preferable because the expansion assisting member 4 is disposed from the proximal end portion to the distal end portion of the balloon without dropping from the balloon 3 even when the balloon 3 is inflated.
In the present embodiment, one end of the expansion auxiliary member 4 is fixed to the first support member 5 and the other end side is slidably held by the second support member 6. The distal end 4 a on the other end side of the expansion auxiliary member 4 has a length protruding outward from the second support member 6.

さらに、図１（ｂ）に示すように、バルーン３が膨張した状態となっても、前記拡張補助部材４の先端４ａが前記第二支持部材６から外側にある程度の長さとして、前記拡張補助部材４がバルーン３の基端部から先端部まで常時配設される構成としている。
また、前記第二支持部材６の後方に該第二支持部材６と前記拡張補助部材４の突出部の先端４ａを一体的に被覆する保護カバー７を装着している。この保護カバー７の材質としてはバルーン材と同様にポリエチレン、ポリプロピレン等のポリオレフィンや、ポリ塩化ビニル、ポリウレタン、ポリアミドエラストマー等の熱可塑性エラストマー、さらに、シリコンゴムやラケックスゴム等の樹脂製のカバーが好ましい。
先端４ａが第二支持部材６から突出した構成であっても、樹脂製の保護カバー７にて全体を被覆しているので、血管内を安全に挿通可能な拡張補助部材を装着したバルーンカテーテルとなり、治療後の引き抜き時にも、血管内壁を傷付けることがない。 Further, as shown in FIG. 1B, even when the balloon 3 is in an inflated state, the distal end 4a of the expansion assisting member 4 is set to a certain length outward from the second support member 6, and the expansion assisting is performed. The member 4 is always arranged from the proximal end portion to the distal end portion of the balloon 3.
In addition, a protective cover 7 that integrally covers the second support member 6 and the distal end 4 a of the protruding portion of the expansion auxiliary member 4 is attached to the rear of the second support member 6. The protective cover 7 is preferably made of a polyolefin cover such as polyethylene or polypropylene, a thermoplastic elastomer such as polyvinyl chloride, polyurethane or polyamide elastomer, and a resin cover such as silicon rubber or racex rubber, as with the balloon material.
Even if the distal end 4a protrudes from the second support member 6, it is covered with the resin protective cover 7 so that the balloon catheter is equipped with an expansion assisting member that can be safely inserted into the blood vessel. The inner wall of the blood vessel is not damaged even when it is pulled out after treatment.

上記したように、バルーン３の外面に拡張補助部材４を装着しているので、このバルーン３を血管内に挿通して膨張させると血管の狭窄部位を拡張することができる。また、拡張補助部材４の両方の端部を支持する構成となるので、血管内で膨張・収縮を繰り返しても、拡張補助部材４が脱落することがない。   As described above, since the expansion assisting member 4 is attached to the outer surface of the balloon 3, the stenotic region of the blood vessel can be expanded by inserting the balloon 3 into the blood vessel and inflating it. In addition, since both ends of the expansion assisting member 4 are supported, the expansion assisting member 4 does not fall off even if the expansion / contraction is repeated in the blood vessel.

前記拡張補助部材４は、弾性変形可能なワイヤ製としている。また、その形状を図２に示すように、バルーン３に接する直線部もしくは緩やかな曲線部４１と、外面に向かって鋭利に研磨された切先部４２を有する形状としている。そのために、バルーン３の膨張・収縮に容易に追従すると共に、狭窄部位のバルーン３が膨張すると狭窄部位を切開するように拡張する拡張補助部材４を得ることができる。
また、前記拡張補助部材４はバルーン外面に複数装着することが好ましく、本実施の形態では外周部に等配して４本の拡張補助部材４を設けている。この装着本数は特に限定されるものでなく、１本の拡張補助部材４を装着したものでよい場合も、また６〜８本の多数本装着したバルーンを用いることも可能であるが、通常の場合ではバルーン外周に４本設ける構成とすることで、血管内の狭窄部位を拡張することができる。 The expansion auxiliary member 4 is made of an elastically deformable wire. Further, as shown in FIG. 2, the shape is a shape having a straight part or a gentle curved part 41 in contact with the balloon 3 and a cut edge part 42 sharply polished toward the outer surface. Therefore, it is possible to obtain the expansion assisting member 4 that easily follows the inflation / deflation of the balloon 3 and expands so as to incise the stenosis part when the balloon 3 at the stenosis part is inflated.
A plurality of expansion assisting members 4 are preferably mounted on the outer surface of the balloon, and in the present embodiment, four expansion assisting members 4 are provided equally on the outer periphery. The number of attachments is not particularly limited, and it is possible to use one expansion auxiliary member 4 attached, or it is possible to use 6 to 8 attached balloons. In some cases, a stenotic site in a blood vessel can be expanded by providing four on the outer periphery of the balloon.

図３に４本の拡張補助部材４を設けた例を示している。これは、第二支持部材６に４個の挿通孔６ａを円周上等配に設けて、４本の拡張補助部材４をスライド自在に支持している例である。また、これらの４本の拡張補助部材４は、それぞれが個別にスライド自在であるので、屈曲した部位においても使用可能なバルーンカテーテルとなる。さらに、狭窄血管の内部でバルーン３が膨張する動作に連動して狭窄血管の内部の四方を切開するように拡張していくので、血管を均等に拡張可能となる。
第二支持部材６は金属製であることが好ましい。これは、ワイヤ製の拡張補助部材４が挿通孔６ａ内をスライドする際に損傷されないようにするためである。また、拡張補助部材４をニッケル・チタン合金製としている。
ニッケル・チタン合金製とすれば、所定の形状を維持する形状記憶合金となり、バルーン収縮時の形状を記憶させておくことができる。この構成であれば、バルーン３を膨張させる際にはその膨張力に追従して弾性変形しながら膨張し、バルーン３が収縮する際には、復元しようとする弾性力を利用して記憶された形状に容易に戻ることができ、バルーン３の収縮に応じて確実に収縮する拡張補助部材を形成することができる。さらに、金属ワイヤ製の拡張補助部材であるので、狭窄部位を確実に拡げることができるカテーテル用バルーンとなる。 FIG. 3 shows an example in which four expansion auxiliary members 4 are provided. This is an example in which four insertion holes 6a are provided on the second support member 6 at equal intervals on the circumference, and the four expansion auxiliary members 4 are slidably supported. In addition, since these four expansion assisting members 4 are individually slidable, the balloon catheter can be used even at a bent portion. Further, since the balloon 3 is expanded so as to incise in four directions inside the stenotic blood vessel in conjunction with the operation of expanding the balloon 3 inside the stenotic blood vessel, the blood vessel can be evenly expanded.
The second support member 6 is preferably made of metal. This is to prevent the wire-made expansion auxiliary member 4 from being damaged when sliding in the insertion hole 6a. The expansion auxiliary member 4 is made of a nickel / titanium alloy.
If it is made of nickel / titanium alloy, it becomes a shape memory alloy that maintains a predetermined shape, and the shape at the time of balloon contraction can be stored. With this configuration, when the balloon 3 is inflated, the balloon 3 expands while elastically deforming following the expansion force, and when the balloon 3 contracts, the balloon 3 is stored using the elastic force to be restored. An expansion assisting member that can easily return to the shape and reliably contracts in response to the contraction of the balloon 3 can be formed. Furthermore, since it is an expansion assisting member made of metal wire, it becomes a balloon for catheter that can surely expand the stenotic region.

上記のような構成としているので、血管内の狭窄部位に、外周部に所定本数の拡張補助部材４を備えるカテーテル用バルーン１を送り込んだ後で、バルーン３を容易に膨張・収縮させることができる。また、血管が屈曲した部位においても、その屈曲した形状に追従してバルーン３を容易に膨張・収縮させることができる。さらに、バルーン３が規定の径よりも過度に膨張した場合でも、拡張補助部材４が脱落することがない。   Since it has the above-described configuration, the balloon 3 can be easily inflated and deflated after the catheter balloon 1 having the predetermined number of expansion assisting members 4 on the outer peripheral portion is sent to the stenosis site in the blood vessel. . Further, even at a site where the blood vessel is bent, the balloon 3 can be easily inflated and deflated following the bent shape. Furthermore, even when the balloon 3 is inflated excessively beyond the specified diameter, the expansion assisting member 4 does not fall off.

上記したように本発明によれば、拡張補助部材をバルーンの外周の基端部から先端部まで延設して、基端部に設ける第一支持部材と先端部に設ける第二支持部材とで前記拡張補助部材を摺動自在に保持する構成とし、バルーンが膨張しても前記拡張補助部材がバルーンの基端部から先端部まで配設される構成としたので、屈曲した部位においても、バルーンと被拡張部との間隙に位置してバルーンの膨張と収縮に容易に追従すると共に、バルーンが規定の径よりも過度に膨張した場合にも脱落しない拡張補助部材を備えるカテーテル用バルーンを得ることができる。   As described above, according to the present invention, the expansion assisting member is extended from the proximal end portion of the outer periphery of the balloon to the distal end portion, and the first support member provided at the proximal end portion and the second support member provided at the distal end portion. The expansion auxiliary member is slidably held, and the expansion auxiliary member is disposed from the proximal end portion to the distal end portion of the balloon even when the balloon is inflated. A balloon for a catheter having an expansion assisting member that is positioned in the gap between the balloon and the expandable part and that easily follows the inflation and deflation of the balloon and that does not fall off even when the balloon is inflated excessively beyond a specified diameter. Can do.

さらに、形状記憶製合金であるニッケル・チタン合金製のワイヤ状の拡張補助部材とすることで、血管内の狭窄部位を確実に拡張し、バルーンの膨張と収縮に容易に追従するように弾性変形するカテーテル用バルーンを得ることができる。   Furthermore, by using a wire-shaped expansion assisting member made of nickel-titanium alloy, which is a shape memory alloy, it is possible to reliably expand the stenosis in the blood vessel and elastically deform so that it can easily follow the expansion and contraction of the balloon. A catheter balloon can be obtained.

本発明に係るカテーテル用バルーンの一例を示す概略説明図であり、（ａ）にはバルーンが収縮した状態を示し、（ｂ）にはバルーンが膨張した状態を示している。It is a schematic explanatory drawing which shows an example of the balloon for catheters concerning this invention, (a) shows the state which the balloon contracted, (b) has shown the state which the balloon expanded. 拡張補助部材の一例を示す拡大断面図である。It is an expanded sectional view showing an example of an expansion auxiliary member. 第二保持部材の断面図である。It is sectional drawing of a 2nd holding member.

符号の説明Explanation of symbols

１ カテーテル用バルーン
３ バルーン
４ 拡張補助部材
４ａ 先端
５ 第一支持部材
６ 第二支持部材
６ａ 挿通孔
７ 保護カバー
４２ 切先部 DESCRIPTION OF SYMBOLS 1 Balloon for catheter 3 Balloon 4 Expansion auxiliary member 4a Tip 5 First support member 6 Second support member 6a Insertion hole 7 Protective cover 42 Cut edge

Claims (7)

バルーン外面に狭窄部位を拡張するための拡張補助部材を有するカテーテル用バルーンであって、前記拡張補助部材をバルーンの基端部から先端部まで延設すると共に、前記基端部に設ける第一支持部材と、前記先端部に設ける第二支持部材とで、前記拡張補助部材を摺動自在に保持すると共に、前記拡張補助部材の端部を前記第一および第二支持部材の少なくとも一方から突出させて、バルーンが膨張しても前記拡張補助部材がバルーンの基端部から先端部まで配設される構成としたことを特徴とするカテーテル用バルーン。   A balloon for a catheter having an expansion assisting member for expanding a stenosis site on the outer surface of the balloon, wherein the expansion assisting member extends from the proximal end portion to the distal end portion of the balloon and is provided at the proximal end portion A member and a second support member provided at the distal end portion hold the expansion auxiliary member slidably, and project an end portion of the expansion auxiliary member from at least one of the first and second support members. Thus, the balloon for catheter is characterized in that the expansion assisting member is disposed from the proximal end portion to the distal end portion of the balloon even when the balloon is inflated. 前記第一支持部材に前記拡張補助部材の一端を固定し、前記先端部に設ける第二支持部材に前記拡張補助部材の他端側を摺動自在に保持すると共に、前記拡張補助部材の他端を前記第二支持部材から突出させたことを特徴とする請求項１に記載のカテーテル用バルーン。   One end of the expansion auxiliary member is fixed to the first support member, the other end side of the expansion auxiliary member is slidably held by a second support member provided at the tip, and the other end of the expansion auxiliary member The catheter balloon according to claim 1, wherein the balloon is protruded from the second support member. 前記拡張補助部材を、鋭利に研磨された切先部を有する弾性変形可能なワイヤ製とし、前記第二支持部材に、前記ワイヤが前記切先部を外面に向けて挿通自在となる挿通孔を設けたことを特徴とする請求項１または２に記載のカテーテル用バルーン。   The expansion assisting member is made of an elastically deformable wire having a sharply ground cut end portion, and the second support member has an insertion hole through which the wire can be inserted with the cut end portion facing the outer surface. The catheter balloon according to claim 1, which is provided. 前記拡張補助部材がニッケル・チタン合金製であることを特徴とする請求項１から３のいずれかに記載のカテーテル用バルーン。   The balloon for catheter according to any one of claims 1 to 3, wherein the expansion assisting member is made of a nickel-titanium alloy. 前記第二支持部材を環状とし、前記挿通孔を円周上に等配して４個設け、バルーン外面に４本の前記拡張補助部材を等配して設ける構成としたことを特徴とする請求項１から４のいずれかに記載のカテーテル用バルーン。   The second support member is annular, the four insertion holes are equally arranged on the circumference, and four expansion auxiliary members are equally provided on the outer surface of the balloon. Item 5. The catheter balloon according to any one of Items 1 to 4. 前記第二支持部材の後方に該第二支持部材と前記拡張補助部材の他端を一体的に被覆する保護カバーを装着したことを特徴とする請求項２から５のいずれかに記載のカテーテル用バルーン。   6. The catheter according to claim 2, wherein a protective cover that integrally covers the second support member and the other end of the expansion assisting member is attached to the rear of the second support member. balloon. 請求項１から６のいずれかに記載のカテーテル用バルーンと、カテーテルチューブとを含むことを特徴とするバルーンカテーテル。   A balloon catheter comprising the catheter balloon according to any one of claims 1 to 6 and a catheter tube.
JP2007046168A 2007-02-26 2007-02-26 Catheter balloon Pending JP2008206702A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011245114A (en) * 2010-05-28 2011-12-08 Nipro Corp Balloon catheter
WO2012029109A1 (en) * 2010-08-30 2012-03-08 株式会社グッドマン Dilatation catheter
CN103949002A (en) * 2014-05-04 2014-07-30 广东博迈医疗器械有限公司 Single-guide wire cutting balloon catheter
KR101656494B1 (en) * 2015-03-17 2016-09-22 연세대학교 산학협력단 Rectal expansion apparatus for immobilization of prostate internal motion

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JP2001314514A (en) * 2000-05-08 2001-11-13 Saito Satoshi Through-lumen type treating tool guiding catheter
JP2004358021A (en) * 2003-06-06 2004-12-24 Riyuusaku Yamada Thrombus/atheroma removal device
JP2005538814A (en) * 2002-09-20 2005-12-22 ババリア・メデイツイーン・テヒノロギー・ゲー・エム・ベー・ハー Medical device for administering pharmaceuticals
JP2006521877A (en) * 2003-03-31 2006-09-28 アプライド メディカル リソーシーズ コーポレイション Self-positionable catheter assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001314514A (en) * 2000-05-08 2001-11-13 Saito Satoshi Through-lumen type treating tool guiding catheter
JP2005538814A (en) * 2002-09-20 2005-12-22 ババリア・メデイツイーン・テヒノロギー・ゲー・エム・ベー・ハー Medical device for administering pharmaceuticals
JP2006521877A (en) * 2003-03-31 2006-09-28 アプライド メディカル リソーシーズ コーポレイション Self-positionable catheter assembly
JP2004358021A (en) * 2003-06-06 2004-12-24 Riyuusaku Yamada Thrombus/atheroma removal device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011245114A (en) * 2010-05-28 2011-12-08 Nipro Corp Balloon catheter
WO2012029109A1 (en) * 2010-08-30 2012-03-08 株式会社グッドマン Dilatation catheter
JPWO2012029109A1 (en) * 2010-08-30 2013-10-28 株式会社グツドマン Dilatation catheter
JP5600745B2 (en) * 2010-08-30 2014-10-01 株式会社グツドマン Dilatation catheter
CN103949002A (en) * 2014-05-04 2014-07-30 广东博迈医疗器械有限公司 Single-guide wire cutting balloon catheter
KR101656494B1 (en) * 2015-03-17 2016-09-22 연세대학교 산학협력단 Rectal expansion apparatus for immobilization of prostate internal motion

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