[go: up one dir, main page]

JP4782297B2 - Catheter balloon and balloon catheter - Google Patents

Catheter balloon and balloon catheter Download PDF

Info

Publication number
JP4782297B2
JP4782297B2 JP2001066321A JP2001066321A JP4782297B2 JP 4782297 B2 JP4782297 B2 JP 4782297B2 JP 2001066321 A JP2001066321 A JP 2001066321A JP 2001066321 A JP2001066321 A JP 2001066321A JP 4782297 B2 JP4782297 B2 JP 4782297B2
Authority
JP
Japan
Prior art keywords
balloon
conical portion
catheter
cone
conical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2001066321A
Other languages
Japanese (ja)
Other versions
JP2002263193A (en
Inventor
正年 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SB Kawasumi Laboratories Inc
Original Assignee
Kawasumi Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasumi Laboratories Inc filed Critical Kawasumi Laboratories Inc
Priority to JP2001066321A priority Critical patent/JP4782297B2/en
Publication of JP2002263193A publication Critical patent/JP2002263193A/en
Application granted granted Critical
Publication of JP4782297B2 publication Critical patent/JP4782297B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/1002—Balloon catheters characterised by balloon shape
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/1002—Balloon catheters characterised by balloon shape
    • A61M2025/1004—Balloons with folds, e.g. folded or multifolded
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/1027—Making of balloon catheters
    • A61M25/1038—Wrapping or folding devices for use with balloon catheters

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Child & Adolescent Psychology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば経皮的冠状動脈血管形成術（ＰＴＣＡ）等に使用するバルーンカテーテルを構成するカテーテル用バルーン及び該カテーテル用バルーンを有するバルーンカテーテルに関するもので、特にバルーンの形態を改良したカテーテル用バルーンの発明に関する。本発明のカテーテル用バルーンは、本発明の目的を達成できるものであればバルーンを有する全てのカテーテルに適用することができる。
【０００２】
【従来の技術及び発明が解決しようとする課題】
図５は従来のカテーテル用バルーン６１（以下、バルーン６１と略記する）の概略図（（Ａ）正面図、（Ｂ）（Ａ）の右側面図）である。
図５のバルーン６１は中間部６２Ｍの両側に円錐部６２Ｃを隣接して形成している。このためバルーン６１をラッピングするとき、円錐部６２Ｃの折りたたみ性が悪く、血管内にバルーンを折りたたんで挿入したとき、円錐部６２Ｃよりバルーンの一部が若干膨らんでしまう傾向があった。この膨張部が血管内を通過するときに血管内壁面に引っかかってしまうため、バルーンの血管通過性が悪かった。
【０００３】
また血管が完全に狭窄している場合、バルーン６１を膨らませながら、狭窄部の通過させるが、前記円錐部６２Ｃが通過時の抵抗になるため、狭窄部通過性も悪かった。
そこで、本発明者は以上の課題を解決するために鋭意検討を重ねた結果、次の発明に到達した。
【０００４】
【課題を解決するための手段】
［１］本発明は、前方と後方とを有する長手方向と、当該長手方向と略垂直に交わる側部方向とを有し、
前方から後方にむけて、前方細径部（１２Ｓ１）、前方円錐部（１２Ｃ１）、略円筒状の中間部（１２Ｍ）、前方円錐部（１２Ｃ２）、及び後方細径部（１２Ｓ２）を順に形成し、
前記中間部（１２Ｍ）の前方及び後方の両側に隣接する前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）の長手方向に沿うように、側部方向に幅を有する面部（Ｐ）を少なくとも一箇所以上形成し、
前記面部（Ｐ）の前記前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）中に占める表面積は、少なくとも３０％以上となるよう形成し、
前記面部（Ｐ）は、前記前方円錐部（１２Ｃ１）の後方端部から当該前方円錐部（１２Ｃ１）の後方端部に隣接する前記中間部（１２Ｍ）の前方端部に亘って形成するとともに前記後方円錐部（１２Ｃ２）の前方端部から当該後方円錐部（１２Ｃ２）の前方端部に隣接する前記中間部（１２Ｍ）の後方端部に亘って形成し、
拡張して血管内を通過させる時に、前記面部（Ｐ）が当該面部（Ｐ）の形態を維持できるように形成したカテーテル用バルーン（１１）を提供する。
［２］本発明は、［１］に記載のカテーテル用バルーン（１１）において、
前記前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）は、当該前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）の側部方向に、３箇所以上の角部（Ｒ）と、当該角部（Ｒ）と同数の面部（Ｐ）を有する多角錐状に形成したカテーテル用バルーン（１１Ａ）を提供する。
［３］本発明は、［１］または［２］に記載のカテーテル用バルーン（１１、１１Ａ）を有するバルーンカテーテルを提供する。
【０００５】
【発明の実施の形態】
図１から図２は本発明の一例を示すカテーテル用バルーン１１、１１Ａ（以下、バルーン１１、１１Ａと略記する）の概略図、図３から図４は参考例を示すカテーテル用バルーン１１Ｂ、１１Ｃ（以下、バルーン１１Ｂ、１１Ｃと略記する）の概略図（（Ａ）正面図、（Ｂ）（Ａ）の右側面図）である。
図１に例示したバルーン１１は、前方と後方とを有する長手方向と、当該長手方向と略垂直に交わる側部方向とを有し、前方から後方にむけて、前方細径部１２Ｓ１、前方円錐部１２Ｃ１、略円筒状の中間部１２Ｍ、前方円錐部１２Ｃ２、及び後方細径部１２Ｓ２を順に形成している。
前記中間部１２Ｍの前方及び後方の両側に隣接する前方円錐部１２Ｃ１及び後方円錐部１２Ｃ２の長手方向に沿うように、側部方向に幅を有する面部Ｐを少なくとも一箇所以上形成している。
前記面部Ｐの前記前方円錐部１２Ｃ１及び後方円錐部１２Ｃ２中に占める表面積は、少なくとも３０％以上となるよう形成している。
前記面部Ｐは、前記前方円錐部１２Ｃ１の後方端部から、当該前方円錐部１２Ｃ１の後方端部に隣接する前記中間部１２Ｍの前方端部に亘って形成し、前記後方円錐部１２Ｃ２の前方端部から当該後方円錐部１２Ｃ２の前方端部に隣接する前記中間部１２Ｍの後方端部に亘って形成している。
拡張して血管内を通過させる時に、前記面部（Ｐ）が面部（Ｐ）の形態を維持できるように形成している。
以上のように円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）に面部Ｐを形成することにより、円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）は面部Ｐに沿って折りたたみやすくなり、折りたたみ性が向上する。
さらに従来の円錐部よりも面積を小さくできるため、血管との接触面積が小さくなり、拡張しながら狭窄部を通過させる場合、通過性、通過時の抵抗が小さくなる。
本発明で前記面部Ｐの円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）中に占める表面積は少なくとも３０％以上形成するのが良い。３０％未満では折りたたみ性が悪くなるので好ましくない。
前記面部Ｐは円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）の上または下または側面のどこに形成しても良い。
【０００６】
図２に例示したバルーン１１Ａは中間部１２Ｍの両側に隣接する前記前方円錐部１２Ｃ１及び後方円錐部１２Ｃ２は、当該前方円錐部１２Ｃ１及び後方円錐部１２Ｃ２の側部方向に、３箇所以上の角部Ｒと、当該角部Ｒと同数の面部Ｐを有する多角錐状に形成したカテーテル用バルーン１１Ａである。
本発明で前記多角錐状とは、少なくともそれぞれ３つ以上の角部Ｒと面部Ｐを有する多角錐状であれば何でも良く、図２のように四角錐以外の多角錐（三角錐、五角錐、六角錐、八角錐等）を採用することができる。また前記角部Ｒは、鋭角でも良いし若干丸みを帯びていても良い。
以上のように円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）を多角錐状に形成することにより、円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）は前記角部Ｒと面部Ｐに沿って折りたたみやすくなり、折りたたみ性が向上する。また、多角錐状に形成することにより従来の円錐部よりも面積を小さくできるため、血管との接触面積が小さくなり、拡張しながら狭窄部を通過させる場合、通過性、通過時の抵抗が小さくなる。
前記角部Ｒと面部Ｐはそれぞれ３箇所から１０箇所設けるのが良い。３箇所未満では、立体的なバルーンを製造することができず、１０箇所を超えると製造が困難となるからである。
【０００７】
また図３に参考例として例示したバルーン１１Ｂは中間部１２Ｍの両側に隣接する前方円錐部１２Ｃ１、後方円錐部１２Ｃ２の少なくとも一方の円錐部１２Ｃに突部１３を形成したバルーン１１Ａである。
突部１３とは円錐部１２Ｃの長さ方向に連続して伸びる線状または不連続に伸びる点線状の突部であり、円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）の外周に設ける数は、３箇所から１０箇所設けることが望ましい。３箇所未満では、折りたたみ性が悪く、血管との接触面積を小さくすることが困難であり、１０箇所を超えると製造が困難となるからである。
突部１３の高さは５μｍから２５μｍに形成される。高さが小さい（５μｍ未満）と血管との接触面積を小さくすることが困難であり、大きすぎる（２５μｍを超える）と血管内に挿入したときに血管内壁面への引っかかりの原因となるので好ましくない。
以上のように円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）の外周に突部１３を形成することにより、円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）は前記突部１３に沿って折りたたみやすくなり、拡張して通過させる場合突部１３が部分的に血管と接するため、血管との接触面積が小さくなり、通過時の抵抗が低減され、通過性が向上する。
【０００８】
また図４に参考例として例示したバルーン１１Ｃは中間部１２Ｍの両側に隣接する前方円錐部１２Ｃ１、後方円錐部１２Ｃ２の少なくとも一方の円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）に溝部２０を形成したバルーン１１Ｃである。溝部２０とは円錐部１２Ｃの長さ方向に伸びる連続した線状または不連続の点線状の溝部であり、円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）の外周に設ける数は、３箇所から１０箇所設けることが望ましい。３箇所未満では、折りたたみ性が悪く、１０箇所を超えると製造が困難となるからである。
溝部２０の深さは５μｍから２５μｍに形成される。溝部２０はあまり深く（２５μｍを超える）形成すると、バルーン１１Ｂの破損の原因となるので好ましくない。他方、溝部２０はあまり浅く（５μｍ未満）形成すると通過時の抵抗が低下せず好ましくない。
以上のように円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）の外周に溝部２０を形成することにより、円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）は前記溝部２０に沿って折りたたみやすくなり、折りたたみ性が向上する。また、狭窄部の通過性が向上する。
【０００９】
【発明の作用効果】
本発明のバルーン（１１、１１Ａ）は、中間部１２Ｍの両側に隣接する前方円錐部１２Ｃ１、後方円錐部１２Ｃ２の少なくとも一方の円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）に、少なくとも一箇所以上の面部Ｐを形成し、また前記円錐部１２（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）を３つ以上の角部Ｒと面部Ｐを有する多角錐状に形成することにより、円錐部１２Ｃ（前方円錐部１２Ｃ１、後方円錐部１２Ｃ２）の折りたたみ性が良くなり、血管内または血管狭窄部の通過性が向上する。
バルーンを拡張させながら狭窄部を通過させるとき、通過時の抵抗が小さくなり、血管狭窄部の通過性が向上する。
【図面の簡単な説明】
【図１】本発明のバルーンの概略図（（Ａ）正面図、（Ｂ）（Ａ）の右側面図）
【図２】本発明のバルーンの概略図（（Ａ）正面図、（Ｂ）（Ａ）の右側面図）
【図３】参考例のバルーンの概略図（（Ａ）正面図、（Ｂ）（Ａ）の右側面図）
【図４】参考例のバルーンの概略図（（Ａ）正面図、（Ｂ）（Ａ）の右側面図）
【図５】従来のバルーンの概略図（（Ａ）正面図、（Ｂ）（Ａ）の右側面図）
【符号の説明】
１１、１１Ａ 本発明のカテーテル用バルーン（バルーン）
１１Ｂ、１１Ｃ 参考例のカテーテル用バルーン（バルーン）
１２Ｃ 円錐部
１２Ｃ１ 前方円錐部
１２Ｃ２ 後方円錐部
１２Ｍ 中間部
１２Ｓ 細径部
１２Ｓ１ 前方細径部
１２Ｓ２ 後方細径部
Ｒ 角部
Ｐ 面部
１３ 突部
２０ 溝部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a balloon for a catheter constituting a balloon catheter used for, for example, percutaneous coronary artery angioplasty (PTCA) and the like, and more particularly to a balloon catheter having the balloon for the catheter. The present invention relates to a balloon invention. The catheter balloon of the present invention can be applied to all catheters having a balloon as long as the object of the present invention can be achieved.
[0002]
[Prior art and problems to be solved by the invention]
FIG. 5 is a schematic diagram ((A) front view, (B) (A) right side view) of a conventional catheter balloon 61 (hereinafter abbreviated as balloon 61).
The balloon 61 shown in FIG. 5 has conical portions 62C adjacent to both sides of the intermediate portion 62M. For this reason, when the balloon 61 is wrapped, the conical portion 62C is not foldable, and when the balloon is folded and inserted into the blood vessel, a part of the balloon tends to be slightly inflated from the conical portion 62C. When this inflated part passes through the inside of the blood vessel, it is caught by the inner wall surface of the blood vessel, so that the blood vessel passing through the balloon is bad.
[0003]
Further, when the blood vessel is completely stenotic, the balloon 61 is allowed to pass through the stenotic part while inflating, but the conical part 62C becomes resistance when passing, so that the stenotic part passing property is poor.
Therefore, as a result of intensive studies to solve the above problems, the present inventor has reached the following invention.
[0004]
[Means for Solving the Problems]
[1] The present invention has a longitudinal direction having a front side and a rear side, and a side part direction that intersects the longitudinal direction substantially perpendicularly.
From the front to the rear, the front narrow portion (12S1), the front conical portion (12C1), the substantially cylindrical intermediate portion (12M), the front conical portion (12C2), and the rear small diameter portion (12S2) are formed in this order. And
At least one surface portion (P) having a width in the side portion direction along the longitudinal direction of the front cone portion (12C1) and the rear cone portion (12C2) adjacent to both the front and rear sides of the intermediate portion (12M). Form more than points,
The surface area of the face part (P) in the front cone part (12C1) and the rear cone part (12C2) is formed to be at least 30%,
Wherein together with the surface (P) is formed the over the forward end of the intermediate portion adjacent the rear end to the rear end of the front conical portion (12C1) of the front conical portion (12C1) (12M) Forming from the front end of the rear cone (12C2) to the rear end of the intermediate portion (12M) adjacent to the front end of the rear cone (12C2);
Provided is a catheter balloon (11) formed so that the surface portion (P) can maintain the shape of the surface portion (P) when expanded and passed through a blood vessel.
[2] The present invention provides the catheter balloon (11) according to [1],
The front conical portion (12C1) and the rear conical portion (12C2) have three or more corner portions (R) and the corner portions in the lateral direction of the front conical portion (12C1) and the rear conical portion (12C2). A catheter balloon (11A) formed in a polygonal pyramid shape having the same number of surface portions (P) as (R) is provided.
[3] The present invention provides a balloon catheter having the catheter balloon (11, 11A) according to [1] or [2].
[0005]
DETAILED DESCRIPTION OF THE INVENTION
1 to 2 are schematic views of catheter balloons 11 and 11A (hereinafter abbreviated as balloons 11 and 11A) showing an example of the present invention, and FIGS . 3 to 4 are catheter balloons 11B and 11C (reference examples ). FIG. 4 is a schematic diagram ( abbreviated as balloons 11B and 11C ) (a front view of (A) and a right side view of (B) and (A)).
The balloon 11 illustrated in FIG. 1 has a longitudinal direction having a front side and a rear side, and a side part direction that intersects the longitudinal direction substantially perpendicularly, and is directed from the front side to the rear side. A portion 12C1, a substantially cylindrical intermediate portion 12M, a front conical portion 12C2, and a rear narrow diameter portion 12S2 are formed in this order.
At least one surface portion P having a width in the lateral direction is formed along the longitudinal direction of the front cone portion 12C1 and the rear cone portion 12C2 adjacent to both the front and rear sides of the intermediate portion 12M.
The surface area of the surface portion P in the front cone portion 12C1 and the rear cone portion 12C2 is formed to be at least 30%.
The surface portion P is formed from the rear end portion of the front cone portion 12C1 to the front end portion of the intermediate portion 12M adjacent to the rear end portion of the front cone portion 12C1, and the front end of the rear cone portion 12C2. To the rear end portion of the intermediate portion 12M adjacent to the front end portion of the rear conical portion 12C2.
The surface portion (P) is formed so as to maintain the shape of the surface portion (P) when expanded and passed through the blood vessel.
Conical portion 12C (front conical portion 12C1, rear conical portion 12C2) as described above by forming the surface P, the conical portion 12C (front conical portion 12C1, rear conical portion 12C2) is easily folded along the surface portion P , Improved folding.
Further, since the area can be made smaller than that of the conventional conical portion, the contact area with the blood vessel is reduced, and when passing through the constricted portion while expanding, the passage property and resistance during passage are reduced.
In the present invention, the surface area of the surface portion P in the conical portion 12C (the front conical portion 12C1 and the rear conical portion 12C2) is preferably at least 30% or more. If it is less than 30%, the folding property is deteriorated, which is not preferable.
The surface portion P may be formed above or below the conical portion 12C (front conical portion 12C1, rear conical portion 12C2) or anywhere on the side surface.
[0006]
In the balloon 11A illustrated in FIG. 2, the front cone portion 12C1 and the rear cone portion 12C2 adjacent to both sides of the intermediate portion 12M have three or more corner portions in the lateral direction of the front cone portion 12C1 and the rear cone portion 12C2. This is a catheter balloon 11A formed in a polygonal pyramid shape having R and the same number of surface portions P as the corner portions R.
In the present invention, the polygonal pyramid shape may be any polygonal pyramid shape having at least three or more corners R and surface portions P, as shown in FIG. Hexagonal pyramid, octagonal pyramid, etc.). The corner R may be an acute angle or may be slightly rounded.
As described above, the conical portion 12C (the front conical portion 12C1 and the rear conical portion 12C2) is formed in the polygonal pyramid shape by forming the conical portion 12C (the front conical portion 12C1 and the rear conical portion 12C2). It becomes easy to fold along, and foldability improves. In addition, since the area can be made smaller than the conventional conical part by forming it in a polygonal pyramid shape, the contact area with the blood vessel is reduced, and when passing through the constricted part while expanding, the passability and resistance during passage are small Become.
The corner portion R and the surface portion P are preferably provided in 3 to 10 locations. This is because if the number is less than three, a three-dimensional balloon cannot be manufactured, and if the number exceeds ten, manufacturing becomes difficult.
[0007]
A balloon 11B illustrated as a reference example in FIG. 3 is a balloon 11A in which a protrusion 13 is formed on at least one conical portion 12C of the front conical portion 12C1 and the rear conical portion 12C2 adjacent to both sides of the intermediate portion 12M.
The protrusion 13 is a line-like protrusion that extends continuously or discontinuously in the length direction of the conical portion 12C, and is provided on the outer periphery of the conical portion 12C (the front conical portion 12C1 and the rear conical portion 12C2). It is desirable to provide three to ten places. If the number is less than three, the foldability is poor, and it is difficult to reduce the contact area with the blood vessel. If the number exceeds ten, the manufacturing becomes difficult.
The height of the protrusion 13 is 5 μm to 25 μm. If the height is small (less than 5 μm), it is difficult to reduce the contact area with the blood vessel. If the height is too large (greater than 25 μm), it is likely to be caught on the inner wall surface of the blood vessel when inserted into the blood vessel. Absent.
Conical portion 12C (front conical portion 12C1, rear conical portion 12C2) as described above by forming a projection 13 on the outer periphery of the conical portion 12C (front conical portion 12C1, rear conical portion 12C2) is the projection 13 It becomes easy to fold along, and when it is expanded and passed, since the protrusion 13 partially contacts the blood vessel, the contact area with the blood vessel is reduced, the resistance during passage is reduced, and the passage is improved.
[0008]
The illustrated balloon 11C as a reference example in FIG. 4 is a front conical portion adjacent to and on both sides of the middle portion 12M 12C1, at least one of the conical portions 12C of the rear conical portion 12C2 (front conical portion 12C1, rear conical portion 12C2) groove 20 in the The balloon 11C is formed. The groove portion 20 is a continuous linear or discontinuous dotted line groove portion extending in the length direction of the conical portion 12C, and the number provided on the outer periphery of the conical portion 12C (the front conical portion 12C1 and the rear conical portion 12C2) is 3. It is desirable to provide 10 places from the place. This is because if it is less than 3 places, the foldability is poor, and if it exceeds 10 places, production becomes difficult.
The depth of the groove 20 is formed from 5 μm to 25 μm. If the groove 20 is formed too deep (over 25 μm), it will cause damage to the balloon 11B, which is not preferable. On the other hand, if the groove portion 20 is formed to be too shallow (less than 5 μm), the resistance during passage does not decrease, which is not preferable.
Conical portion 12C (front conical portion 12C1, rear conical portion 12C2) as described above by forming a groove 20 on the outer periphery of the conical portion 12C (front conical portion 12C1, rear conical portion 12C2) is along the groove 20 It becomes easy to fold, and foldability improves. In addition, the passability of the narrowed portion is improved.
[0009]
[Effects of the invention]
The balloon of the present invention (11, 11A) has a front conical portion 12C1 adjacent to both sides of the middle portion 12M, at least one of the conical portions 12C of the rear conical portion 12C2 (front conical portion 12C1, rear conical portion 12C2), at least a The conical portion 12C is formed by forming the surface portion P at more than one place and forming the conical portion 12 (front conical portion 12C1, rear conical portion 12C2) in a polygonal pyramid shape having three or more corner portions R and the surface portion P. The foldability of (the front cone portion 12C1 and the rear cone portion 12C2) is improved, and the passage through the blood vessel or the blood vessel stenosis portion is improved.
When passing through a stenosis part while expanding a balloon, resistance at the time of passage becomes small, and the passage of a vascular stenosis part improves.
[Brief description of the drawings]
FIG. 1 is a schematic view of a balloon of the present invention ((A) front view, (B) (A) right side view).
FIG. 2 is a schematic view of the balloon of the present invention ((A) front view, (B) (A) right side view).
FIG. 3 is a schematic view of a balloon of a reference example ((A) front view, (B) (A) right side view).
FIG. 4 is a schematic view of a balloon of a reference example ((A) front view, (B) (A) right side view).
FIG. 5 is a schematic view of a conventional balloon ((A) front view, (B) (A) right side view).
[Explanation of symbols]
11, 11A Balloon for catheter of the present invention (balloon)
Balloon for catheter of 11B and 11C reference examples (balloon)
12C Conical part
12C1 forward cone
12C2 Rear conical part 12M Intermediate part 12S Small diameter part
12S1 Front narrow part
12S2 Rear narrow diameter portion R Corner portion P Surface portion 13 Projection portion 20 Groove portion

Claims (3)

前方と後方とを有する長手方向と、当該長手方向と略垂直に交わる側部方向とを有し、
前方から後方にむけて、前方細径部（１２Ｓ１）、前方円錐部（１２Ｃ１）、略円筒状の中間部（１２Ｍ）、前方円錐部（１２Ｃ２）、及び後方細径部（１２Ｓ２）を順に形成し、
前記中間部（１２Ｍ）の前方及び後方の両側に隣接する前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）の長手方向に沿うように、側部方向に幅を有する面部（Ｐ）を少なくとも一箇所以上形成し、
前記面部（Ｐ）の前記前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）中に占める表面積は、少なくとも３０％以上となるよう形成し、
前記面部（Ｐ）は、前記前方円錐部（１２Ｃ１）の後方端部から当該前方円錐部（１２Ｃ１）の後方端部に隣接する前記中間部（１２Ｍ）の前方端部に亘って形成するとともに前記後方円錐部（１２Ｃ２）の前方端部から当該後方円錐部（１２Ｃ２）の前方端部に隣接する前記中間部（１２Ｍ）の後方端部に亘って形成し、
拡張して血管内を通過させる時に、前記面部（Ｐ）が当該面部（Ｐ）の形態を維持できるように形成したことを特徴とするカテーテル用バルーン（１１）。A longitudinal direction having a front side and a rear side, and a side direction that intersects the longitudinal direction substantially perpendicularly;
From the front to the rear, the front narrow portion (12S1), the front conical portion (12C1), the substantially cylindrical intermediate portion (12M), the front conical portion (12C2), and the rear small diameter portion (12S2) are formed in this order. And
At least one surface portion (P) having a width in the side portion direction along the longitudinal direction of the front cone portion (12C1) and the rear cone portion (12C2) adjacent to both the front and rear sides of the intermediate portion (12M). Form more than points,
The surface area of the face part (P) in the front cone part (12C1) and the rear cone part (12C2) is formed to be at least 30%,
Wherein together with the surface (P) is formed the over the forward end of the intermediate portion adjacent the rear end to the rear end of the front conical portion (12C1) of the front conical portion (12C1) (12M) Forming from the front end of the rear cone (12C2) to the rear end of the intermediate portion (12M) adjacent to the front end of the rear cone (12C2);
A balloon for catheter (11), wherein the balloon (11) is formed so that the face (P) can maintain the form of the face (P) when expanded and passed through the blood vessel. 請求項１に記載のカテーテル用バルーン（１１）において、
前記前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）は、当該前方円錐部（１２Ｃ１）及び後方円錐部（１２Ｃ２）の側部方向に、３箇所以上の角部（Ｒ）と、当該角部（Ｒ）と同数の面部（Ｐ）を有する多角錐状に形成したことを特徴とするカテーテル用バルーン（１１Ａ）。 The catheter balloon (11) according to claim 1,
The front conical portion (12C1) and the rear conical portion (12C2) have three or more corner portions (R) and the corner portions in the lateral direction of the front conical portion (12C1) and the rear conical portion (12C2). A balloon for catheter ( 11A ), which is formed in a polygonal pyramid shape having the same number of surface portions (P) as (R ) . 請求項１または請求項２に記載のカテーテル用バルーン（１１、１１Ａ）を有する、ことを特徴とするバルーンカテーテル。A balloon catheter comprising the catheter balloon ( 11, 11A ) according to claim 1 or 2.
JP2001066321A 2001-03-09 2001-03-09 Catheter balloon and balloon catheter Expired - Fee Related JP4782297B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001066321A JP4782297B2 (en) 2001-03-09 2001-03-09 Catheter balloon and balloon catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001066321A JP4782297B2 (en) 2001-03-09 2001-03-09 Catheter balloon and balloon catheter

Publications (2)

Publication Number Publication Date
JP2002263193A JP2002263193A (en) 2002-09-17
JP4782297B2 true JP4782297B2 (en) 2011-09-28

Family

ID=18924822

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001066321A Expired - Fee Related JP4782297B2 (en) 2001-03-09 2001-03-09 Catheter balloon and balloon catheter

Country Status (1)

Country Link
JP (1) JP4782297B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1625869A4 (en) * 2003-05-19 2007-03-14 Kaneka Corp Balloon catheter and method of manufacturing the same
US8088100B2 (en) * 2006-10-20 2012-01-03 Boston Scientific Scimed, Inc. Reinforced rewrappable balloon
JP5428209B2 (en) * 2008-06-11 2014-02-26 株式会社カネカ Medical balloon catheter
JP5912685B2 (en) 2012-03-08 2016-04-27 株式会社東海メディカルプロダクツ Balloon for IABP balloon catheter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226887A (en) * 1992-02-07 1993-07-13 Interventional Technologies, Inc. Collapsible folding angioplasty balloon
US5456666A (en) * 1994-04-26 1995-10-10 Boston Scientific Corp Medical balloon folding into predetermined shapes and method
US5458572A (en) * 1994-07-01 1995-10-17 Boston Scientific Corp. Catheter with balloon folding into predetermined configurations and method of manufacture
NL9500468A (en) * 1995-03-08 1996-10-01 Cordis Europ Balloon catheter and method of making it.
US5733301A (en) * 1996-01-11 1998-03-31 Schneider (Usa) Inc. Laser ablation of angioplasty catheters and balloons
FR2753907B1 (en) * 1996-10-02 1999-07-16 Nycomed Lab Sa BALLOON FOR EXPANSION CATHETER AND MANUFACTURING METHOD THEREOF

Also Published As

Publication number Publication date
JP2002263193A (en) 2002-09-17

Similar Documents

Publication Publication Date Title
US5507301A (en) Catheter and guidewire system with flexible distal portions
CA2360551C (en) Bifurcation stent delivery system
US5830227A (en) Balloon angioplasty catheter with enhanced capability to penetrate a tight arterial stenosis
US6129706A (en) Corrugated catheter balloon
US5425712A (en) Dilatation catheter having soft bumper tip
US9821148B2 (en) Balloon catheter and method for manufacturing it
JP5053631B2 (en) Balloon catheter and manufacturing method thereof
US6296655B1 (en) Catheter balloon with biased multiple wings
JP2001508320A (en) Balloon catheter
EP3484571B1 (en) High-pressure dilation catheter balloon
JP2008543368A (en) Balloon catheter with increased column strength
JP2005224635A (en) Balloon catheter
AU2003216365A1 (en) Guidewire for embolic protection comprising an activatable stop and methods of use
JP2009509719A5 (en)
JP2007503878A5 (en)
JP4782297B2 (en) Catheter balloon and balloon catheter
JP2007529281A5 (en)
JP2010508066A5 (en)
JP4850707B2 (en) Balloon assembly with torque
US6623451B2 (en) Folding spring for a catheter balloon
KR20190064943A (en) A Stent
US20060276820A1 (en) Balloon catheter and method of manufacturing the same
US20050261723A1 (en) Folded balloon for catheter
US8083714B2 (en) Catheter balloon
JP4369700B2 (en) Catheter balloon and balloon catheter

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080218

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100714

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100803

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100909

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101109

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101224

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110628

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110707

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140715

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees