JPH08317988A - Catheter - Google Patents
CatheterInfo
- Publication number
- JPH08317988A JPH08317988A JP7150833A JP15083395A JPH08317988A JP H08317988 A JPH08317988 A JP H08317988A JP 7150833 A JP7150833 A JP 7150833A JP 15083395 A JP15083395 A JP 15083395A JP H08317988 A JPH08317988 A JP H08317988A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- catheter
- main
- soft tip
- main body
- 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.)
- Granted
Links
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、患者の冠状動脈内に挿
入して、造影用カテーテル、または、バルーンカテーテ
ルのガイド用として使用する医療器具のカテーテルに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catheter of a medical instrument which is inserted into a coronary artery of a patient and used as a guide for an imaging catheter or a balloon catheter.
【０００２】[0002]
【従来の技術】カテーテル１は（図４参照）、テフロン
等の樹脂製の内層管３とポリアミドまたはポリウレタン
製の外被管５と、その内層管３と外被管５の間にステン
レス線網体等の網目層４を介装した多層構造可撓性の極
細管の主体管２を主要部になし、その主体管２の先端に
短小チップの軟質先端体６を接続固着した構造を有し、
その先端部分等の所定位置には、自由状態で所要の曲成
形状を呈する曲成部１０が設けられている。2. Description of the Related Art A catheter 1 (see FIG. 4) comprises an inner tube 3 made of a resin such as Teflon, an outer jacket tube 5 made of polyamide or polyurethane, and a stainless wire net between the inner tube 3 and the outer jacket tube 5. It has a structure in which a main body 2 of a flexible ultrafine tube having a multilayer structure in which a mesh layer 4 of a body or the like is provided ,
At a predetermined position such as the tip end portion thereof, a bending portion 10 having a desired bending shape in a free state is provided.
【０００３】即ち、曲成部１０はカテーテル１の先端を
冠状動脈の所定位置に到達させたとき、左心房血管また
は右心房血管の曲り形状に主体管２を素直に適合させ
て、血管造影等の操作が円滑にできるように配慮したも
ので、図４（Ａ）のジヤドキンスＲ型、（Ｂ）のジヤド
キンスＬ型、（Ｃ）のピッグテール型等のように、使用
対象の血管形状に対応した曲り形状を有している。な
お、図中の１２は主体管２の基部、１５は主体管２の基
部１２に取り付けた端末具、１６は基部１２に覆着した
端末弾性管である。That is, when the distal end of the catheter 1 reaches a predetermined position of the coronary artery, the bending portion 10 obediently adapts the main body tube 2 to the curved shape of the left atrium blood vessel or the right atrium blood vessel to perform angiography or the like. In order to make the operation of the operation smooth, it corresponds to the shape of the blood vessel to be used, such as the J-kind R type in FIG. 4 (A), the J-kind L type in (B) and the pigtail type in (C). It has a curved shape. In the figure, 12 is a base of the main tube 2, 15 is a terminal attached to the base 12 of the main tube 2, and 16 is an elastic terminal tube covered with the base 12.
【０００４】そして、そのカテーテル１は主体管２を血
管内に挿入して（時に回転させながら）押し進め、先導
する軟質先端体６が冠状動脈の所定位置に到達すると、
曲成部１０を自由状態に復元させて、左心房または右心
房の血管形状にフィットさせて、先端部分の血管内姿勢
を安定させると共に、先端から噴射する造影剤の噴射反
力を、そのフィット姿勢の曲成部１０に担持させるよう
になっている。Then, the catheter 1 is advanced by inserting (mainly rotating) the main body tube 2 into the blood vessel, and when the leading soft tip body 6 reaches a predetermined position of the coronary artery,
The bent portion 10 is restored to a free state and fitted to the shape of the blood vessel of the left atrium or the right atrium to stabilize the intravascular posture of the tip portion, and the ejection reaction force of the contrast agent ejected from the tip is fitted to the fit. It is designed to be supported by the bent portion 10 in the posture.
【０００５】そして、その主体管２は曲りくねった複雑
な径路の血管に挿入するため、その挿入進行時の回転に
よる捩れと、押入抵抗による座屈に耐え、かつ、血管径
路に沿った変形性を満す応分の剛性と可撓性を有する管
体として、樹脂押し出し成形法によって、基部１２から
先端１３に至るまで一様な剛性・可撓性のものに形成さ
れている。Since the main body tube 2 is inserted into a blood vessel having a tortuous and complicated path, the main tube 2 withstands twisting due to rotation during the insertion process and buckling due to pushing resistance, and is deformable along the blood vessel path. As a tubular body having a sufficient rigidity and flexibility satisfying the above condition, it is formed by resin extrusion molding so as to have a uniform rigidity and flexibility from the base portion 12 to the tip 13.
【０００６】[0006]
【発明が解決しようとする課題】そのカテーテル１を血
管内へ挿入して順次進行させるとき、長尺線状体の主体
管２が受ける捩り外力と座屈荷重は、先端１３から基部
１２の方向に漸増大する荷重特性となり、さらに、軟質
先端体６に近い主体管２の先端部分は、先導して血管内
を進行する軟質先端体６に柔軟に追従する弾性が必要に
なる。When the catheter 1 is inserted into a blood vessel and sequentially advanced, the external twisting force and the buckling load applied to the main tube 2 of the long linear body are in the direction from the tip 13 to the base 12. The load characteristic gradually increases, and the tip portion of the main body tube 2 close to the soft tip body 6 is required to have elasticity to flexibly follow the soft tip body 6 that leads and advances in the blood vessel.
【０００７】しかし、前記構造の従来の主体管２は、全
長が一様な剛性・弾性にして、全長中最も強い剛性を要
する基部１２の近傍部分の使用適性に合うものに形成さ
れているので、先端部分の弾性不足によって、血管内挿
入の抵抗が大となって患者の負担が大になると共に、血
管内の所定位置へ軟質先端体６を到達させる挿入操作
が、やりづらくして高度の熟練と技術が必要になる難点
がある。However, the conventional main body tube 2 having the above-described structure is formed to have a uniform rigidity and elasticity over the entire length and to be suitable for use in the vicinity of the base portion 12 which requires the strongest rigidity in the entire length. , Insufficient elasticity of the tip portion increases the resistance of insertion into the blood vessel and increases the burden on the patient, and the insertion operation for reaching the soft tip body 6 to a predetermined position in the blood vessel is difficult and difficult to perform. There are difficulties that require skill and skill.
【０００８】そして、カテーテル１を血管に挿入すると
き、曲成部１０は血管径路に沿って伸ばされながら進行
するので、曲成部１０のコーナー部位１１は、かなりの
捩り応力と伸し応力を受けて、管体つぶれや異常変形の
現象が生じ易く、円滑な挿入進行を妨げると共に、最終
の到達位置に達したとき、自由状態への復元起点となる
べきコーナー部位１１の復元力が不足して、曲成部１０
が所定の曲成姿勢に復元せず、血管内姿勢が不安定とな
って造影剤噴射がうまくできず、正常な造影作業を妨げ
る上、前記の患者負担と挿入操作性が一段と悪くなる。When the catheter 1 is inserted into a blood vessel, the bent portion 10 advances while being stretched along the blood vessel path, so that the corner portion 11 of the bent portion 10 is subjected to considerable torsional stress and stretching stress. In response, the phenomenon of tube collapse or abnormal deformation is likely to occur, which hinders smooth insertion progress, and when the final reaching position is reached, the restoring force of the corner portion 11 that should be the starting point for restoring to the free state is insufficient. Music composition section 10
Does not restore to a predetermined curved posture, the intravascular posture becomes unstable, and the contrast medium cannot be injected well, which hinders normal contrasting work, and the patient burden and insertion operability become worse.
【０００９】本発明は、以上の従来技術の難点を解消
し、血管内挿入に際する患者負担の低減と挿入操作性の
向上を図るカテーテルを提供するものである。The present invention provides a catheter which solves the above-mentioned drawbacks of the prior art and reduces the patient's burden during insertion into a blood vessel and improves insertion operability.
【００１０】[0010]
【課題を解決するための手段】以上の技術課題を解決す
る本発明のカテーテルは「樹脂製の内層管と前記内層管
を被包する外被管を有する可撓性極細管の主体管の先端
に、軟質先端体を接続固着したカテーテルにおいて、前
記外被管は、弾性が異なる外被管ピースを所定位置に配
設し、軟質先端体側の先端から基部方向へ、弾性が段階
状に漸減変化する先方部分高弾性・後方部分高剛性の主
体管構造」のカテーテルと、The catheter of the present invention which solves the above technical problems is "a tip of a main body tube of a flexible ultrafine tube having an inner layer tube made of resin and an outer tube enclosing the inner layer tube. In the catheter with the soft tip body connected and fixed, the jacket tube is provided with a jacket tube piece having different elasticity at a predetermined position, and the elasticity gradually changes from the tip on the soft tip body side toward the base portion in a stepwise manner. A catheter with a main tube structure that has high elasticity in the front part and high rigidity in the rear part.
【００１１】「樹脂製の内層管と前記内層管を被包する
外被管を有する可撓性極細管の主体管の先端に、軟質先
端体を接続固着すると共に、前記軟質先端体側の前記主
体管の所要部分に、所要形状の曲成部を設けたカテーテ
ルにおいて、前記曲成部のコーナー部位に高剛性外被管
ピースを介装配設し、前記コーナー部位の前記主体管
を、前記コーナー部位を挾む主体管より高剛性構造」に
したカテーテルになっている。"A flexible tip body is connected and fixed to the tip of a main body tube of a flexible ultrafine tube having a resin inner layer tube and an outer tube for enclosing the inner layer tube, and the main body on the side of the soft tip body is fixed. In a catheter in which a curved portion having a required shape is provided in a required portion of a pipe, a high-rigidity jacket tube piece is disposed at a corner portion of the curved portion, and the main pipe at the corner portion is connected to the corner portion. The catheter has a structure with higher rigidity than that of the main body tube.
【００１２】即ち、本発明のカテーテルは、血管内挿入
に際して主体管の各部位が受ける荷重特性に適応する主
体管構成にすることを意図するもので、主体管の必要箇
所に高弾性または高剛性の外被管ピースを配設し、主体
管の長さ方向の剛性・弾性を段階的に変化させる構造が
特徴である。そして、その外被管ピースは、必要に応じ
て単一の主体管に単数配設または複数配設されると共
に、前記の先方部分高弾性・後方部分高剛性のカテーテ
ルでは、軟質先端体と主体管の接合面を、軟質先端体か
ら遠ざかる方向に下降傾斜して、外周から内周方向に傾
斜する傾斜接合面の接合態様が採択される。[0012] That is, the catheter of the present invention is intended to have a main tube structure adapted to the load characteristics received by each part of the main tube during insertion into a blood vessel, and has a high elasticity or high rigidity at a necessary portion of the main tube. The structure is characterized by arranging the jacket pipe piece and gradually changing the rigidity and elasticity in the length direction of the main pipe. The jacket tube piece is provided in a single main body tube in a single or a plurality of pieces as needed, and in the above-mentioned catheter with a high elasticity in the front portion and a high rigidity in the rear portion, the soft tip body and the main body are mainly used. The joining mode of the inclined joining surface in which the joining surface of the pipe is inclined downward in the direction away from the soft tip body and is inclined from the outer circumference to the inner circumference is adopted.
【００１３】[0013]
【作用】以上の構成の前記の先方部分高弾性・後方部分
高剛性のカテーテルは、血管内挿入に際して大なる捩り
荷重と座屈荷重を受ける主体管の基部側部分が高剛性質
になり、軟質先端体に先導されて複雑な血管径路に柔軟
に追従すべき主体管の先端側部分が高弾性質になるの
で、血管内への挿入進行の抵抗が少く、患者負担が低減
すると共に、その挿入進行の操作がし易くなる。With the above-described catheter having a high elasticity in the front part and a high rigidity in the rear part, the base side part of the main body tube which is subjected to a large torsion load and buckling load during insertion into the blood vessel has a high rigidity and is flexible. Leading to the tip body, the tip side of the main body tube that should flexibly follow a complicated blood vessel path becomes highly elastic, so there is little resistance to the progress of insertion into the blood vessel, the patient burden is reduced, and the insertion It becomes easy to operate the process.
【００１４】そして、前記の曲成部コーナー高剛性構造
のものは、その曲成部が血管内進行に際して強い捩りや
曲げ外力を受けても、その外力による応力が集中するコ
ーナー部位が高剛性質のため、曲成部の管体つぶれや異
常変形が防止される。そして、血管内の最終位置に到達
したとき、その剛性による復元反力によって所定の曲成
形状に容易に復元して血管形状にフィットするので、血
管内姿勢が安定して造影剤噴射が円滑になると共に、最
終位置へ到達させる操作が容易になり、かつ、患者負担
が低減する。In the bent portion corner high rigidity structure, even if the bent portion is subjected to strong torsion or bending external force when advancing in the blood vessel, the corner portion where the stress due to the external force is concentrated has high rigidity. Therefore, the collapse of the tube body and the abnormal deformation of the bent portion are prevented. When it reaches the final position in the blood vessel, it is easily restored to a predetermined curved shape by the restoring reaction force due to its rigidity and fits to the blood vessel shape, so that the intravascular posture is stable and the injection of the contrast agent is smooth. At the same time, the operation to reach the final position is facilitated and the burden on the patient is reduced.
【００１５】そして、前記の傾斜接合面態様のものは、
血管内への挿入抵抗を受けて径大方向に膨出しようとす
る軟質先端体が、その傾斜接合面で外方に存在する主体
管によって押え付けられて膨出変形を防止するので、融
着・接着による両者の接合固着が剥離するおそれが極め
て少くなり、軟質先端体の接続固着姿勢が安定する。And, in the above-mentioned inclined joint surface mode,
The soft tip body that tries to bulge in the radial direction due to the insertion resistance into the blood vessel is pressed by the main tube existing outside at the inclined joint surface to prevent bulging deformation, so fusion bonding・ There is very little risk of peeling off the joint and adhesion of the two due to adhesion, and the connection and attachment posture of the soft tip body becomes stable.
【００１６】[0016]
【実施例】以下、実施例に基づいて詳しく説明する。ま
ず、前記の先方部分高弾性・後方部分高剛性の主体管か
らなる本発明第一実施例のカテーテルを示す図１を参照
して、テフロン製の内層管２とポリアミドまたはポリウ
レタン製の外被管５との間に、ステンレス線編組物の網
体層４を介装した可撓性の主体管２を主要部になし、そ
の主体管２の先端に、外被管５より軟質の短小筒体チッ
プの軟質先端体６を接続固定したカテーテル１におい
て、主体管２の外被管５は、軟質先端体６に続く先端部
分が高弾性短小管体の外被管ピース７Ａと、この外被管
ピース７Ａから基部１２まで連続する単一管体の主外被
管８によって形成されている。Embodiments will be described in detail below based on embodiments. First, referring to FIG. 1 showing a catheter of a first embodiment of the present invention, which comprises a main tube having a high elasticity in the front part and a high rigidity in the rear part, an inner layer tube 2 made of Teflon and a jacket tube made of polyamide or polyurethane. 5, a flexible main tube 2 having a mesh body layer 4 of a stainless wire braid interposed therein is formed in the main part, and a short tubular body softer than the jacket tube 5 at the tip of the main tube 2. In a catheter 1 to which a soft tip body 6 of a tip is connected and fixed, a sheath tube 5 of a main body tube 2 has a sheath tube piece 7A whose tip portion following the soft tip body 6 is a highly elastic short tube body, and a sheath tube piece 7A. It is formed by the main jacket tube 8 of a single tubular body which is continuous from the piece 7A to the base 12.
【００１７】詳しくは、外被管ピース７Ａと主外被管８
は、同一内径と同一外径を有して、連続単一体の内層管
３の網目層４の外周を被包して、その主外被管８と外被
管ピース７Ａの端面を接合し、単一の外被管５を構成し
ている。そして、主外被管８はカテーテル１として必要
な応分の剛性・弾性を有すると共に、外被管ピース７Ａ
は主外被管８より弾性に富み、主体管２が先端１３から
基部１２の方向へ弾性が段階的に変化する「先方高弾性
・後方高剛性」の構成を有している。More specifically, the jacket tube piece 7A and the main jacket tube 8
Has the same inner diameter and the same outer diameter, envelops the outer periphery of the mesh layer 4 of the inner layer tube 3 of a continuous single body, and joins the main outer tube 8 and the end surface of the outer tube piece 7A to each other, A single jacket tube 5 is constructed. The main jacket tube 8 has the rigidity and elasticity required for the catheter 1 and the jacket tube piece 7A.
Is richer in elasticity than the main jacket pipe 8, and the main pipe 2 has a "front high elasticity / rear high rigidity" configuration in which the elasticity changes stepwise from the tip 13 to the base 12.
【００１８】そして、この図１実施例のものは、軟質先
端体６と外被管ピース７Ａの接合面が、軟質先端体６の
外周から内周方向へ傾斜すると共に、その傾斜が軟質先
端体６から遠ざかる方向に下降する傾斜接合面９によっ
て融着または接着される傾斜接合構造になっている。な
お、この実施例の曲げ弾性率は、軟質先端体６が１，８
００kgｆ／cm2、外被管ピース７Ａが３，２００kgｆ／c
m2、主外被管８が５，０００kgｆ／cm2、である。そし
て、主体管２の直径は２．７mm、軟質先端体６の長さ約
５mm、外被管ピース７Ａの長さ約４mmのサイズである。In the embodiment of FIG. 1, the joint surface between the soft tip body 6 and the jacket tube piece 7A is inclined from the outer circumference of the soft tip body 6 toward the inner peripheral direction, and the inclination is the soft tip body. The slanted joint structure 9 is fused or bonded by the slanted joint surface 9 that descends in the direction away from 6. The bending elastic modulus of this embodiment is 1, 8 for the soft tip body 6.
00kgf / cm 2 , outer tube piece 7A is 3,200kgf / c
m 2 , the main jacket tube 8 is 5,000 kgf / cm 2 . The main tube 2 has a diameter of 2.7 mm, the soft tip body 6 has a length of about 5 mm, and the jacket tube piece 7A has a length of about 4 mm.
【００１９】以上の図１実施例のものは、曲りくねった
血管内へ挿入する際に、先導する軟質先端体６に追従し
て自在に変形進行すべき主体管２の先端部分が弾性に富
むので、その追従進行がし易くなると共に、回転挿入す
る挿入抵抗と捩り抵抗を要する「先端部分以外の主体管
２」が応分の剛性を有するので、異常な変形や座屈を生
ずるおそれが少く、患者の負担が低減すると共に、その
挿入操作がし易くなる。In the embodiment of FIG. 1 described above, the distal end portion of the main body tube 2 which is to be freely deformed and advanced by following the leading soft tip body 6 when inserted into a tortuous blood vessel is rich in elasticity. Therefore, the follow-up progress is facilitated, and since the "main body pipe 2 other than the tip portion" which requires insertion resistance and twist resistance for rotational insertion has appropriate rigidity, there is little possibility of abnormal deformation or buckling. The burden on the patient is reduced and the insertion operation becomes easier.
【００２０】そして、傾斜接合面９の構成を有するの
で、血管内挿入の際の軟質先端体６の膨出を抑止して軟
質先端体６の接続姿勢を安定する前記の作用が存在する
と共に、前記の曲成部１０を曲成加工するに際し、主体
管２の所定部分をシリコンオイル浴に浸漬するとき、軟
質先端体６と主体管２の外周接合ポイントを、そのシリ
コンオイル浴から遠ざけられるので（軟質先端体６の直
径方向に面接合する形状より、傾斜度に比例して外周接
合ポイントが遠ざかる）、熱影響による軟質先端体６と
主体管２表面剥離が防止され、血管内挿入に際して有害
な軟質先端体６と主体管２の接合表面の「まくれ」「剥
離」が防止される。Further, since the slanted joint surface 9 is provided, there is the above-described action of suppressing the bulging of the soft tip body 6 during insertion into the blood vessel and stabilizing the connection posture of the soft tip body 6. When a predetermined portion of the main body tube 2 is immersed in a silicone oil bath when the bending section 10 is bent, the outer peripheral joint point between the soft tip body 6 and the main body tube 2 can be kept away from the silicone oil bath. (The outer peripheral joint point moves away in proportion to the inclination from the shape of the soft tip body 6 that is surface-joined in the diametrical direction), and the surface peeling of the soft tip body 6 and the main body tube 2 due to the heat effect is prevented, which is harmful when inserted into the blood vessel "Blistering" and "peeling" of the joint surface between the flexible tip body 6 and the main body tube 2 are prevented.
【００２１】続いて、図２を参照して「先方高弾性・後
方高剛性」の主体管２の他の実施例を説明する。即ち、
図１実施例と同様な外被管ピース７を有するものにおい
て、外被管ピース７が７Ａ・７Ｂの複数連設になってお
り、主体管２が先端１３から基部方向へ複数段に弾性変
化する「先方高弾性・後方高剛性」の構成になってい
る。なお、この図２のものの曲げ弾性率は、軟質先端体
６が１，８００kgｆ／cm2、先端寄りの外被管ピース７
Ａが３，２００kgｆ／cm2、外被管ピース７Ｂが４，０
００kgｆ／cm2、主外被管８が５，０００kgｆ／cm2、で
ある。そして、主体管２の直径は２．７mm、外被管ピー
ス７Ａの長さ約１５mm、外被管ピース７Ｂの長さ約２０
mmのサイズである。以上の図２実施例のものは、主体管
２の弾性が先端１３から基部方向へ三段階に変化するの
で、前記の図１実施例の作用が一段と顕著になる。Next, with reference to FIG. 2, another embodiment of the main tube 2 of "high elastic ahead / high rigidity rearward" will be described. That is,
In the one having the jacket pipe piece 7 similar to that of the embodiment shown in FIG. 1, the jacket pipe pieces 7 are continuously arranged in a plurality of 7A and 7B, and the main body pipe 2 is elastically changed in a plurality of stages from the tip 13 toward the base portion. It has a "front high elasticity and rear high rigidity" configuration. The bending elastic modulus of the one shown in FIG. 2 is 1,800 kgf / cm 2 for the soft tip body 6, and the jacket tube piece 7 near the tip.
A is 3,200 kgf / cm 2 and jacket tube piece 7B is 4,0
00kgf / cm 2, Omogai steering column tube 8 is 5,000kgf / cm 2,. The main tube 2 has a diameter of 2.7 mm, the jacket tube piece 7A has a length of about 15 mm, and the jacket tube piece 7B has a length of about 20 mm.
The size is mm. In the embodiment of FIG. 2 described above, the elasticity of the main tube 2 changes from the tip 13 toward the base in three steps, so that the operation of the embodiment of FIG. 1 becomes more remarkable.
【００２２】つぎに、コーナー部位高剛性構造のカテー
テル１の一実施例を図３に基づいて説明する。即ち、図
１実施例と同様な内層管３・網目層４・外被管５からな
る主体管２を主要部になし、その主体管２の先端に軟質
先端体６を接続固着し、かつ、主体管２の先端部分に略
Ｕ字形状の曲成部１０を設けたカテーテル１において、
曲成部１０の第一コーナーのコーナー部位１１（第一コ
ーナーとは、曲成部１０の基部１２寄りの最初の曲げ部
分をいう）は、剛性に富む外被管ピース７Ｃによって形
成され、この外被管ピース７Ｃは、外被管ピース７Ｃを
挾む両側の主外被管８より剛性が強くなっている。Next, an embodiment of the catheter 1 having a highly rigid corner portion will be described with reference to FIG. That is, a main body tube 2 composed of an inner layer tube 3, a mesh layer 4 and a jacket tube 5 similar to that of the embodiment of FIG. 1 is formed as a main part, and a soft tip body 6 is connected and fixed to the tip of the main body tube 2, and In the catheter 1 in which a bent portion 10 having a substantially U shape is provided at the tip portion of the main body tube 2,
The corner portion 11 of the first corner of the bent portion 10 (the first corner means the first bent portion near the base 12 of the bent portion 10) is formed by the jacket pipe piece 7C having high rigidity. The jacket tube piece 7C is stronger than the main jacket tubes 8 on both sides of the jacket tube piece 7C.
【００２３】即ち、主体管２は、単一管体の網目層４つ
き内層管３に、主外被管８と外被管ピース７Ａ・７Ｃを
接合して単一の外被管５を被包する構造を有し、高剛性
の外被管ピース７Ｃがコーナー部位１１に装着されてい
る。そして、この実施例のものは、図１実施例と同様な
弾性に富む外被管ピース７Ａが主体管２の先端に装着さ
れ、先端１３から基部１２の方向へ、外被管ピース７Ａ
・主外被管８・外被管ピース７Ｃ・主外被管８の順列連
設になっており、主体管２は「曲成部１０のコーナー部
位１１が剛性質」にして「先方部分高弾性・後方部分の
高剛性」の構成を有している。なお、この図３実施例の
外被管５の曲げ弾性率は、主外被管８が５，０００kgｆ
／cm2、外被管ピース７Ａが２，１００kgｆ／cm2、外被
管ピース７Ｃが８，０００kgｆ／cm2であり、外被管ピ
ース７Ｃの長さ約２０粍である。That is, the main body tube 2 is formed by joining the main jacket tube 8 and the jacket tube pieces 7A and 7C to the inner tube 3 having the mesh layer 4 of a single tube body to cover the single jacket tube 5. A high-rigidity jacket tube piece 7C having a wrapping structure is attached to the corner portion 11. In this embodiment, a jacket pipe piece 7A having a high elasticity similar to that of the embodiment of FIG. 1 is attached to the tip of the main body tube 2, and the jacket tube piece 7A extends from the tip 13 toward the base 12.
-The main jacket tube 8, the jacket tube piece 7C, and the main jacket tube 8 are arranged in series, and the main tube 2 has "the corner portion 11 of the bent portion 10 is rigid" and has a "partial height of the forward end". It has a structure of "elasticity and high rigidity of the rear part". The bending elastic modulus of the jacket tube 5 of the embodiment of FIG. 3 is 5,000 kgf for the main jacket tube 8.
/ Cm 2 , the jacket tube piece 7A is 2,100 kgf / cm 2 , the jacket tube piece 7C is 8,000 kgf / cm 2 , and the jacket tube piece 7C has a length of about 20 m.
【００２４】以上の図３実施例のカテーテル１は、曲成
部１０が自由状態の曲げ姿勢に復元するときの復元変形
起点となるコーナー部位１１が高剛性になるので、冠状
動脈の所定位置に達した曲成部１０が、所定の曲成姿勢
に復元し易く、血管形状にフィットする。従って、血管
内姿勢が安定すると共に、造影剤噴射の反力を曲成部１
０が担持して円滑な造影操作ができる。そして、その外
被管ピース７Ｃは短小ピースであることから、曲成部１
０を伸ばして血管内に挿入進行するカテーテル１の挿入
作業を妨げるおそれはない。In the catheter 1 of the embodiment shown in FIG. 3 described above, since the corner portion 11 which becomes the starting point of the restoring deformation when the bending portion 10 is restored to the bending posture in the free state has a high rigidity, it is placed at a predetermined position of the coronary artery. The reached bending portion 10 is easily restored to a predetermined bending posture and fits the blood vessel shape. Therefore, the posture in the blood vessel is stabilized, and the reaction force of the injection of the contrast agent is suppressed by the bending portion 1.
Since 0 is carried, smooth contrast operation can be performed. Since the jacket tube piece 7C is a short and small piece, the bent portion 1
There is no risk of interfering with the insertion work of the catheter 1 which extends 0 and advances into the blood vessel.
【００２５】なお、前記実施例の外被管ピース７Ａ・７
Ｂ・７Ｃと、図３実施例における外被管ピース７Ａ・７
Ｃ間の主外被管８は、それぞれ別体の管体に形成され、
網目層４に嵌めて装着され、その網目層４と前後に接合
する主外被管８等に融着・接着接続される。The jacket tube pieces 7A and 7 of the above embodiment
B · 7C and jacket pipe pieces 7A · 7 in the embodiment of FIG.
The main jacket tube 8 between C is formed in a separate tube body,
It is fitted and attached to the mesh layer 4, and is fusion-bonded and connected to the main envelope pipe 8 and the like which are joined to the mesh layer 4 in the front and back.
【００２６】なお、本発明のカテーテル１は、前記の実
施例に限定されず、外被管ピース７Ａ・７Ｂ・７Ｃは任
意長に設定して使用されると共に、曲成部１０の第一コ
ーナー以外の部位に装着することがある。The catheter 1 of the present invention is not limited to the above-mentioned embodiment, and the jacket tube pieces 7A, 7B and 7C are set to have an arbitrary length and used, and the first corner of the bent portion 10 is used. May be attached to parts other than.
【００２７】[0027]
【発明の効果】以上の説明のとおり、本発明のカテーテ
ルの先方高弾性・後方高剛性のものは、血管内挿入の際
の患者負担が低減すると共に、その挿入操作がし易くな
って、カテーテルの使用性能を向上する。そして、曲成
部のコーナー高剛性のものは、血管内挿入姿勢が安定し
て造影操作等が円滑かつ良好に行えるようになり、カテ
ーテル性能を一段と向上する。以上の諸効果がある。Industrial Applicability As described above, the catheter of the present invention having a high elasticity in the forward direction and a high rigidity in the backward direction reduces the burden on the patient when the catheter is inserted into a blood vessel and facilitates the insertion operation. Improve the use performance of. Further, when the bent portion has high corner rigidity, the insertion posture in the blood vessel is stable, and the contrast operation can be smoothly and favorably performed, and the catheter performance is further improved. There are various effects described above.
【図１】本発明第一実施例のカテーテルの要部の拡大正
面断面図FIG. 1 is an enlarged front sectional view of a main part of a catheter according to a first embodiment of the present invention.
【図２】本発明の他の実施例のカテーテルの要部の拡大
正面断面図FIG. 2 is an enlarged front sectional view of a main part of a catheter according to another embodiment of the present invention.
【図３】本発明の他の実施例のカテーテルを示し、
（Ａ）はその全形正面図、（Ｂ）はその曲成部の拡大部
分正面断面図FIG. 3 shows a catheter of another embodiment of the present invention,
(A) is the whole front view, (B) is an enlarged partial front sectional view of the bent portion
【図４】従来のカテーテルを示し、（Ａ）（Ｂ）（Ｃ）
はその全形または部分正面図、（Ｄ）はその主体管の拡
大部分正面断面図FIG. 4 shows a conventional catheter, (A) (B) (C)
Is a whole or partial front view, and (D) is an enlarged partial front sectional view of the main pipe.
１ カテーテル ２ 主体管 ３ 内層管 ４ 網目層 ５ 外被管 ６ 軟質先端体 ７Ａ・７Ｂ・７Ｃ 外被管ピース ８ 主外被管 ９ 傾斜接合面 １０ 曲成部 １１ コーナー部位 １２ 基部 １３ 先端 DESCRIPTION OF SYMBOLS 1 Catheter 2 Main pipe 3 Inner layer pipe 4 Network layer 5 Outer sheath pipe 6 Soft tip body 7A, 7B, 7C Outer sheath pipe piece 8 Main outer sheath pipe 9 Inclined joint surface 10 Bent portion 11 Corner portion 12 Base portion 13 Tip
Claims (5)
外被管を有する可撓性極細管の主体管の先端に、軟質先
端体を接続固着したカテーテルにおいて、前記外被管
は、弾性が異なる外被管ピースを所定位置に配設し、軟
質先端体側の先端から基部方向へ、弾性が段階状に漸減
変化する先方部分高弾性・後方部分高剛性の主体管構造
を特徴とするカテーテル。1. A catheter in which a soft tip body is connected and fixed to a tip of a main body tube of a flexible ultrafine tube having an inner layer tube made of resin and an outer tube for enclosing the inner layer tube, wherein the outer tube is , Characterized by a main tube structure with a front part high elasticity and a rear part high rigidity, in which jacket pipe pieces with different elasticity are arranged at predetermined positions, and the elasticity gradually decreases gradually from the tip of the soft tip body toward the base. Catheter to be.
カテーテル。2. The catheter according to claim 1, wherein a plurality of jacket tube pieces are arranged.
質先端体の外周から内周方向に傾斜し、かつ、前記軟質
先端体から遠ざかる方向に下降する傾斜接合面からなる
請求項１のカテーテル。3. The joint surface between the soft tip body and the main pipe is an inclined joint surface that is inclined inward from the outer circumference of the soft tip body and descends in a direction away from the soft tip body. Catheter.
外被管を有する可撓性極細管の主体管の先端に、軟質先
端体を接続固着すると共に、前記軟質先端体側の前記主
体管の所要部分に、所要形状の曲成部を設けたカテーテ
ルにおいて、前記曲成部のコーナー部位に高剛性外被管
ピースを介装配設し、前記コーナー部位の前記主体管
を、前記コーナー部位を挾む主体管より高剛性構造にし
た主体管構造を特徴とするカテーテル。4. A soft tip body is connected and fixed to the tip of a main body tube of a flexible ultrafine tube having a resin inner layer tube and an outer tube enclosing the inner layer tube, and the soft tip body is provided with the soft tip body. In a catheter in which a curved portion having a required shape is provided in a required portion of a main body tube, a high-rigidity jacket pipe piece is interposed at a corner portion of the curved portion, and the main body pipe in the corner portion is connected to the corner. A catheter characterized by a main body tube structure that has a higher rigidity than the main body tube that sandwiches the body part.
ーナーに配設した請求項４のカテーテル。5. The catheter according to claim 4, wherein the high-rigidity jacket tube piece is arranged at the first corner of the bent portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07150833A JP3115796B2 (en) | 1995-05-24 | 1995-05-24 | catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07150833A JP3115796B2 (en) | 1995-05-24 | 1995-05-24 | catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08317988A true JPH08317988A (en) | 1996-12-03 |
| JP3115796B2 JP3115796B2 (en) | 2000-12-11 |
Family
ID=15505385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07150833A Expired - Fee Related JP3115796B2 (en) | 1995-05-24 | 1995-05-24 | catheter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3115796B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11114068A (en) * | 1997-10-16 | 1999-04-27 | Terumo Corp | Medical tube and medical tube producing device |
| JP2001333985A (en) * | 2000-05-26 | 2001-12-04 | Sumitomo Bakelite Co Ltd | Nasal cavity guiding tube |
| JP2006115949A (en) * | 2004-10-19 | 2006-05-11 | Asahi Intecc Co Ltd | Medical solution infusion device |
| JP2007082707A (en) * | 2005-09-21 | 2007-04-05 | Asahi Intecc Co Ltd | Chemical solution injector and its manufacturing method |
| JP2008539048A (en) * | 2005-04-28 | 2008-11-13 | セント・ジュード・メディカル・エイトリアル・フィブリレーション・ディヴィジョン・インコーポレーテッド | Tearable atraumatic tip and body for a catheter or sheath |
| JP2009538707A (en) * | 2006-05-30 | 2009-11-12 | ボストン サイエンティフィック リミテッド | Medical devices and related systems and methods |
| US9072874B2 (en) | 2011-05-13 | 2015-07-07 | Boston Scientific Scimed, Inc. | Medical devices with a heat transfer region and a heat sink region and methods for manufacturing medical devices |
| JP2017140242A (en) * | 2016-02-10 | 2017-08-17 | テルモ株式会社 | Medical long body and balloon catheter |
| US9808595B2 (en) | 2007-08-07 | 2017-11-07 | Boston Scientific Scimed, Inc | Microfabricated catheter with improved bonding structure |
| US9901706B2 (en) | 2014-04-11 | 2018-02-27 | Boston Scientific Scimed, Inc. | Catheters and catheter shafts |
| US10207077B2 (en) | 2003-03-27 | 2019-02-19 | Boston Scientific Scimed, Inc. | Medical device |
-
1995
- 1995-05-24 JP JP07150833A patent/JP3115796B2/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11114068A (en) * | 1997-10-16 | 1999-04-27 | Terumo Corp | Medical tube and medical tube producing device |
| JP2001333985A (en) * | 2000-05-26 | 2001-12-04 | Sumitomo Bakelite Co Ltd | Nasal cavity guiding tube |
| US10207077B2 (en) | 2003-03-27 | 2019-02-19 | Boston Scientific Scimed, Inc. | Medical device |
| JP2006115949A (en) * | 2004-10-19 | 2006-05-11 | Asahi Intecc Co Ltd | Medical solution infusion device |
| US7985204B2 (en) | 2004-10-19 | 2011-07-26 | Asahi Intecc Co., Ltd. | Reagent injection device |
| JP4754626B2 (en) * | 2005-04-28 | 2011-08-24 | セント・ジュード・メディカル・エイトリアル・フィブリレーション・ディヴィジョン・インコーポレーテッド | Tearable atraumatic tip and body for a catheter or sheath |
| JP2008539048A (en) * | 2005-04-28 | 2008-11-13 | セント・ジュード・メディカル・エイトリアル・フィブリレーション・ディヴィジョン・インコーポレーテッド | Tearable atraumatic tip and body for a catheter or sheath |
| JP2007082707A (en) * | 2005-09-21 | 2007-04-05 | Asahi Intecc Co Ltd | Chemical solution injector and its manufacturing method |
| US8206356B2 (en) | 2005-09-21 | 2012-06-26 | Asahi Intecc Co., Ltd. | Reagent injection apparatus and method of producing the same |
| JP2009538707A (en) * | 2006-05-30 | 2009-11-12 | ボストン サイエンティフィック リミテッド | Medical devices and related systems and methods |
| US9808595B2 (en) | 2007-08-07 | 2017-11-07 | Boston Scientific Scimed, Inc | Microfabricated catheter with improved bonding structure |
| US9072874B2 (en) | 2011-05-13 | 2015-07-07 | Boston Scientific Scimed, Inc. | Medical devices with a heat transfer region and a heat sink region and methods for manufacturing medical devices |
| US9901706B2 (en) | 2014-04-11 | 2018-02-27 | Boston Scientific Scimed, Inc. | Catheters and catheter shafts |
| JP2017140242A (en) * | 2016-02-10 | 2017-08-17 | テルモ株式会社 | Medical long body and balloon catheter |
| US10617852B2 (en) | 2016-02-10 | 2020-04-14 | Terumo Kabushiki Kaisha | Medical elongated body and balloon catheter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3115796B2 (en) | 2000-12-11 |
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