JP6464861B2 - Tip movable catheter - Google Patents

Tip movable catheter Download PDF

Info

Publication number
JP6464861B2
JP6464861B2 JP2015060313A JP2015060313A JP6464861B2 JP 6464861 B2 JP6464861 B2 JP 6464861B2 JP 2015060313 A JP2015060313 A JP 2015060313A JP 2015060313 A JP2015060313 A JP 2015060313A JP 6464861 B2 JP6464861 B2 JP 6464861B2
Authority
JP
Japan
Prior art keywords
hole
holding
catheter
screw portion
female screw
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.)
Active
Application number
JP2015060313A
Other languages
Japanese (ja)
Other versions
JP2016179007A (en
Inventor
健夫 西澤
健夫 西澤
雅人 大坪
雅人 大坪
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.)
Zeon Corp
Original Assignee
Zeon Corp
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 Zeon Corp filed Critical Zeon Corp
Priority to JP2015060313A priority Critical patent/JP6464861B2/en
Publication of JP2016179007A publication Critical patent/JP2016179007A/en
Application granted granted Critical
Publication of JP6464861B2 publication Critical patent/JP6464861B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Media Introduction/Drainage Providing Device (AREA)

Description

本発明は、各種の治療や検査等を行うために用いられる医療用処置具であるカテーテルに関し、特に、先端部を自在に偏向することが可能な先端可動カテーテル(Steerable Catheter)に関する。   The present invention relates to a catheter that is a medical treatment instrument used for performing various treatments, examinations, and the like, and in particular, relates to a steerable catheter that can freely deflect a distal end portion.

体腔、管腔または血管等を通して、各種の臓器(例えば、心臓)等の目的組織まで挿入されるカテーテル(例えば、電極カテーテル、アブレーションカテーテル、カテーテルシースを含む)においては、その挿入や目的組織への接近の容易化等を図るため、体内に挿入されるカテーテルの遠位端(先端)の向きを、体外に配置されるカテーテルの近位端(基端)側に設けられた操作部を操作することにより偏向できるようにした先端可動カテーテルが知られている(例えば、下記特許文献1参照)。   For catheters (including electrode catheters, ablation catheters, and catheter sheaths) that are inserted through body cavities, lumens, blood vessels, and the like to target tissues such as various organs (for example, the heart). In order to facilitate access and the like, the direction of the distal end (tip) of the catheter inserted into the body is controlled by operating the operation unit provided on the proximal end (base end) side of the catheter disposed outside the body. A tip movable catheter that can be deflected by this is known (for example, see Patent Document 1 below).

カテーテルチューブの先端部の偏向すべき部分は、例えば先端に行くにしたがってその硬度が段階的に低く設定されており、その先端に一体的に内挿されたリング(プルリング)の180°対向位置に一対のワイヤのそれぞれの遠位端を接続し、該一対のワイヤのそれぞれの近位端において、一方のワイヤ(第1ワイヤ)を引っ張り、他方のワイヤ(第2ワイヤ)を弛ませることにより、チューブ先端の向きを制御できるようにしている。   The portion to be deflected of the distal end portion of the catheter tube is set to have a stepwise lower hardness as it goes to the distal end, for example, at a position 180 ° opposite to a ring (pull ring) that is integrally inserted at the distal end. By connecting each distal end of a pair of wires, pulling one wire (first wire) and loosening the other wire (second wire) at each proximal end of the pair of wires; The direction of the tube tip can be controlled.

このようなカテーテルチューブの近位端側に設けられる操作部としては、例えば下記特許文献1に開示されるように、略円板状の回転操作部材を一対の保持部材で挟み込んだ状態で回転自在に保持し、回転操作部材を時計方向または反時計方向に回転させることにより、一方のワイヤを引っ張り、他方のワイヤを緩めるようにしたものが知られている。   As an operation portion provided on the proximal end side of such a catheter tube, as disclosed in, for example, Patent Document 1 below, the operation portion is rotatable in a state where a substantially disk-shaped rotation operation member is sandwiched between a pair of holding members. In the known example, one of the wires is pulled and the other wire is loosened by rotating the rotating operation member clockwise or counterclockwise.

回転操作部材および一対の保持部材には、回転操作部材の回転中心を中心とする貫通穴が互いに対応するようにそれぞれ形成されている。これらの貫通穴には、略円柱状の軸部の一端部にフランジ部を有し、他端部に雌ねじ部を有する回転軸部材が挿入され、雄ねじ部および頭部を有するノブ部材の該雄ねじ部が回転軸部材の雌ねじ部に螺合される。ノブ部材を回転軸部材に強固にねじ込むことにより、一対の保持部材により回転操作部材が強く挟持されて、該回転軸部材の回転が制限され、したがってカテーテルチューブの先端部の形状が固定される。これと反対に、ノブ部材の回転軸部材に対する螺合を緩めることにより、該回転操作部材の回転の制限が解除されて、カテーテルチューブの先端部の形状を任意に変更し得るようになっている。   The rotation operation member and the pair of holding members are formed with through-holes centering on the rotation center of the rotation operation member so as to correspond to each other. In these through holes, a rotary shaft member having a flange portion at one end of a substantially cylindrical shaft portion and a female screw portion at the other end is inserted, and the male screw of the knob member having a male screw portion and a head portion The portion is screwed into the female screw portion of the rotating shaft member. By firmly screwing the knob member into the rotation shaft member, the rotation operation member is strongly held by the pair of holding members, and the rotation of the rotation shaft member is restricted, and thus the shape of the distal end portion of the catheter tube is fixed. On the contrary, by loosening the screwing of the knob member to the rotating shaft member, the rotation restriction of the rotating operation member is released, and the shape of the distal end portion of the catheter tube can be arbitrarily changed. .

実用新案登録第3162588号公報Utility Model Registration No. 3162588

しかしながら、上述したような従来技術によると、ノブ部材は回転軸部材に螺合されることにより、保持されているため、何らかの理由によりノブ部材を緩めすぎてしまった場合には、回転軸部材に対する螺合が解除されてしまい、ノブ部材が脱落する場合があるという問題があった。   However, according to the prior art as described above, the knob member is held by being screwed to the rotary shaft member. Therefore, if the knob member is loosened too much for some reason, There is a problem in that the screw member is released and the knob member may fall off.

本発明は、このような点に鑑みてなされたものであり、操作部を構成する部品の脱落を防止できる先端可動カテーテルを提供することを目的とする。   The present invention has been made in view of these points, and an object of the present invention is to provide a distal-end movable catheter that can prevent parts constituting the operation unit from falling off.

本発明に係る先端可動カテーテルは、
カテーテルチューブと、前記カテーテルチューブの近位端側に設けられた操作部とを備えた先端可動カテーテルであって、
前記操作部は、
その中心部に第1貫通穴を有する第1保持部と、
その中心部に前記第1貫通穴に対応する第2貫通穴を有する第2保持部と、
その中心部に前記第1貫通穴および前記第2貫通穴に対応する第3貫通穴を有し、前記第1保持部および前記第2保持部に挟み込まれた状態で、該第1保持部および該第2保持部に回転自在に保持された略円板状の回転操作部材と、
略円柱状の軸部の一端部に前記第2貫通穴よりも大きいフランジ部を、他端部に第1雌ねじ部を有し、該第1雌ねじ部が前記第2貫通穴を介して前記第3貫通穴に挿入された回転軸部材と、
前記第1貫通穴よりも小径の首部の一端部に前記第1貫通穴よりも大きい頭部を、他端部に該第1貫通穴よりも大きい外径を有し、前記第1雌ねじ部に螺合される雄ねじ部を有するノブ部材とを備え、
前記第1貫通穴の内周の少なくとも一部に、前記雄ねじ部をねじ込むことにより前記雄ねじ部が前記第1貫通穴を通過することを可能とするねじ山を有する第2雌ねじ部を設けたことを特徴とする。
The tip movable catheter according to the present invention is:
A tip movable catheter provided with a catheter tube and an operation part provided on the proximal end side of the catheter tube,
The operation unit is
A first holding part having a first through hole in its central part;
A second holding portion having a second through hole corresponding to the first through hole at the center thereof;
The first holding portion and the third through hole corresponding to the first through hole and the second through hole are sandwiched between the first holding portion and the second holding portion. A substantially disk-shaped rotation operation member rotatably held by the second holding portion;
A flange portion larger than the second through hole is provided at one end portion of the substantially cylindrical shaft portion, and a first female screw portion is provided at the other end portion, and the first female screw portion is inserted into the first through the second through hole. A rotating shaft member inserted into the three through holes;
A head portion larger than the first through hole is formed at one end portion of the neck portion having a smaller diameter than the first through hole, and an outer diameter larger than the first through hole is formed at the other end portion. A knob member having a male screw portion to be screwed,
A second female screw portion having a thread that allows the male screw portion to pass through the first through hole by screwing the male screw portion into at least a part of the inner periphery of the first through hole. It is characterized by.

本発明に係る先端可動カテーテルにおいて、
前記第2雌ねじ部は、前記第1雌ねじ部の中心軸に対して傾斜した中心軸を有するようにすることができる。
In the tip movable catheter according to the present invention,
The second female threaded portion may have a central axis that is inclined with respect to the central axis of the first female threaded portion.

本発明に係る先端可動カテーテルにおいて、
前記第2雌ねじ部の前記中心軸は、前記ノブ部材の前記雄ねじ部が、前記第2保持部が存在する側と反対側から前記第1貫通穴にねじ込まれたときに、前記ノブ部材の前記頭部が前記カテーテルチューブの遠位端側に傾くように傾斜させて設けることができる。
In the tip movable catheter according to the present invention,
The central axis of the second female threaded portion is such that the male threaded portion of the knob member is screwed into the first through hole from the side opposite to the side where the second holding portion is present. The head can be provided so as to be inclined so as to be inclined toward the distal end side of the catheter tube.

本発明に係る先端可動カテーテルにおいて、
前記第1雌ねじ部の外径よりも前記軸部の外径を小径に設定し、
前記第1雌ねじ部に前記軸部と反対側の端部から該軸部まで至るスリット部を設け、
前記第3貫通穴の内周に、前記第1雌ねじ部が該第3貫通穴に挿入される際には前記スリット部を通過し、完全に挿入された状態では前記軸部に位置するように、内側を指向した突起部を設けることができる。
In the tip movable catheter according to the present invention,
Setting the outer diameter of the shaft portion to be smaller than the outer diameter of the first female screw portion;
The first female thread portion is provided with a slit portion extending from the end opposite to the shaft portion to the shaft portion,
In the inner periphery of the third through hole, when the first female screw portion is inserted into the third through hole, it passes through the slit portion, and when fully inserted, it is positioned at the shaft portion. , A protrusion directed inward can be provided.

本発明の先端可動カテーテルによれば、何らかの理由によりノブ部材を緩めすぎてしまい、回転軸部材に対する螺合が解除されてしまった場合であっても、第2保持部の第2貫通穴よりも雄ねじ部の外径が大きいため、ノブ部材が操作部(第1保持部)から脱落することが防止される。   According to the distal end movable catheter of the present invention, even if the knob member is loosened for some reason and the screwing to the rotating shaft member is released, it is more than the second through hole of the second holding portion. Since the outer diameter of the male screw portion is large, the knob member is prevented from falling off from the operation portion (first holding portion).

本発明の実施形態の先端可動カテーテルの外観構成を示す平面図である。It is a top view which shows the external appearance structure of the tip movable catheter of embodiment of this invention. 図1のA−A線に沿った断面図である。It is sectional drawing along the AA line of FIG. 本発明の実施形態の先端可動カテーテルのグリップ部および操作部の構成を分解して示す側面図である。It is a side view which decomposes | disassembles and shows the structure of the grip part and operation part of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのグリップ表部材の構成を示す平面図である。It is a top view which shows the structure of the grip surface member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのグリップ裏部材の構成を示す平面図である。It is a top view which shows the structure of the grip back member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのグリップ表部材の保持部の構成を示す断面図ある。It is sectional drawing which shows the structure of the holding part of the grip surface member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのグリップ裏部材の保持部の構成を示す断面図ある。It is sectional drawing which shows the structure of the holding | maintenance part of the grip back member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルの操作部の構成を示す平面図である。It is a top view which shows the structure of the operation part of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルの操作部の構成を示す側面図である。It is a side view which shows the structure of the operation part of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルの所定角度回転した場合における操作部の側面図である。It is a side view of the operation part when the tip movable catheter of the embodiment of the present invention is rotated by a predetermined angle. 本発明の実施形態の先端可動カテーテルのノブ部材の構成を示す正面図である。It is a front view which shows the structure of the knob member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルの回転軸部材の構成を示す正面図である。It is a front view which shows the structure of the rotating shaft member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルの回転軸部材の構成を示す側面図である。It is a side view which shows the structure of the rotating shaft member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルの回転軸部材の構成を示す平面図である。It is a top view which shows the structure of the rotating shaft member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルの回転軸部材の取付時の手順を示す一部断面図である。It is a partial cross section figure which shows the procedure at the time of attachment of the rotating shaft member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのノブ部材の取付時の手順を示す一部断面図(その1)である。It is a partial cross section figure (the 1) which shows the procedure at the time of attachment of the knob member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのノブ部材の取付時の手順を示す一部断面図(その2)である。It is a partial cross section figure (2) which shows the procedure at the time of attachment of the knob member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのノブ部材の取付時の手順を示す一部断面図(その3)である。It is a partial cross section figure (the 3) which shows the procedure at the time of attachment of the knob member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのノブ部材の取付時の手順を示す一部断面図(その4)である。It is a partial cross section figure (the 4) which shows the procedure at the time of attachment of the knob member of the tip movable catheter of embodiment of this invention. 本発明の実施形態の先端可動カテーテルのノブ部材の取付時の手順を示す一部断面図(その5)である。It is a partial cross section figure (the 5) which shows the procedure at the time of attachment of the knob member of the tip movable catheter of embodiment of this invention.

以下、本発明の実施形態について図面を参照して具体的に説明する。本実施形態の先端可動カテーテルとしてのカテーテルシース(先端可動シース)は、例えば、カテーテルアブレーションを行う際に、心電を検出するための電極カテーテルや患部を焼灼するためのアブレーションカテーテル等に先行して挿入され、これらの電極カテーテルやアブレーションカテーテル等を案内するカテーテルである。以下では、本発明が適用される先端可動カテーテルとして、カテーテルシースを例に説明するが、電極カテーテルやアブレーションカテーテル、その他の先端可動カテーテルにも本発明を適用することができる。   Embodiments of the present invention will be specifically described below with reference to the drawings. The catheter sheath (tip movable sheath) as the tip movable catheter of this embodiment precedes, for example, an electrode catheter for detecting an electrocardiogram or an ablation catheter for cauterizing an affected part when performing catheter ablation. A catheter that is inserted and guides these electrode catheters, ablation catheters, and the like. Hereinafter, a catheter sheath will be described as an example of the distal movable catheter to which the present invention is applied. However, the present invention can also be applied to an electrode catheter, an ablation catheter, and other distal movable catheters.

なお、カテーテルアブレーションとは、心臓に生じる不整脈を治療するための治療法であり、その先端部に高周波電極を有するアブレーションカテーテルを血管を経由して心臓内の不整脈の原因となっている心筋組織まで挿入し、該心筋組織またはその近傍を60〜70℃程度で焼灼して凝固壊死せしめ、不整脈の回路を遮断する治療法である。   Catheter ablation is a treatment method for treating an arrhythmia occurring in the heart. An ablation catheter having a high-frequency electrode at its distal end is passed through a blood vessel to the myocardial tissue causing the arrhythmia in the heart. This is a treatment method in which the cardiac muscle tissue or its vicinity is cauterized at about 60 to 70 ° C. to cause coagulative necrosis, thereby interrupting the arrhythmia circuit.

まず、図1、図2および図3を参照する。カテーテルシース1は、カテーテルチューブとしてのシース本体2と、操作部3、グリップ部4、一対のワイヤ5a,5b、ノブ部材6および回転軸部材7とを概略備えて構成されている。   First, FIG. 1, FIG. 2 and FIG. 3 will be referred to. The catheter sheath 1 includes a sheath body 2 as a catheter tube, an operation unit 3, a grip unit 4, a pair of wires 5a and 5b, a knob member 6, and a rotary shaft member 7.

シース本体2は中空のチューブからなり、図示は省略しているが、例えば網状のステンレス等からなるブレード層および複数の樹脂層を含む多層チューブが用いられる。シース本体2の遠位端側の一部はその向きが任意に偏向可能な偏向部21となっており、偏向部21はその余の部分よりも硬度が低く(柔軟に)設定されており、さらに偏向部21においてはその先端にいくにしたがって徐々にまたは段階的に硬度が低くなるように設定されている。なお、シース本体2の材質は、可撓性を備えるものであれば特に限定されないが、熱可塑性樹脂または熱可塑性エラストマーであることが好ましく、例えば、ポリエーテルブロックアミド共重合体などのポリアミド系エラストマー、ポリアミド、ポリイミド、ポリアミドイミド、ポリエチレンテレフタレート、ポリエチレン、ポリプロピレン、ポリウレタン、エチレン・酢酸ビニル共重合体、ポリ塩化ビニルなどが用いられる。   Although the sheath body 2 is formed of a hollow tube and is not shown in the figure, for example, a multilayer tube including a blade layer made of mesh-like stainless steel and a plurality of resin layers is used. A part of the distal end side of the sheath body 2 is a deflecting portion 21 whose direction can be arbitrarily deflected, and the deflecting portion 21 is set to have a lower hardness (flexibly) than the remaining portion, Further, the deflection portion 21 is set so that the hardness decreases gradually or step by step toward the tip. The material of the sheath body 2 is not particularly limited as long as it has flexibility, but is preferably a thermoplastic resin or a thermoplastic elastomer, for example, a polyamide-based elastomer such as a polyether block amide copolymer. Polyamide, polyimide, polyamideimide, polyethylene terephthalate, polyethylene, polypropylene, polyurethane, ethylene / vinyl acetate copolymer, polyvinyl chloride, and the like are used.

シース本体2の近位端側に取り付けられた操作部3およびグリップ部4には、シース本体2の近位端側の部分が挿通される挿通孔が形成されていて、グリップ部4の近位端には、シースハブ49aが取り付けられている。シースハブ49aは内腔を有していて、シースハブ49aの近位端側にはグリップ部4内のシース本体2が、シースハブ49aの内腔とシース本体2のメインルーメン22とが連通するように取り付けられている。また、シースハブ49aの遠位端側には、止血弁を備えたカテーテル挿入口が形成されている。カテーテルシース1の使用時(処置時)には、上述した電極カテーテルやアブレーションカテーテルがシースハブ49aのカテーテル挿入口から挿入され、シース本体2のメインルーメン22に案内されて、それぞれの先端部が処置すべき心筋組織まで導かれる。また、シースハブ49aの側部には、側注管が形成されていて、その側注管にはチューブ49bを介して三方活栓49cが取り付けられている。三方活栓49cには、例えばシリンジなどを取り付けて、体内の血液を吸引したり、体内に薬液を送り込んだりすることができる。   An insertion hole through which a portion on the proximal end side of the sheath body 2 is inserted is formed in the operation portion 3 and the grip portion 4 attached to the proximal end side of the sheath body 2. A sheath hub 49a is attached to the end. The sheath hub 49a has a lumen, and the sheath body 2 in the grip portion 4 is attached to the proximal end side of the sheath hub 49a so that the lumen of the sheath hub 49a and the main lumen 22 of the sheath body 2 communicate with each other. It has been. In addition, a catheter insertion opening having a hemostasis valve is formed on the distal end side of the sheath hub 49a. When the catheter sheath 1 is used (procedure), the above-described electrode catheter or ablation catheter is inserted from the catheter insertion port of the sheath hub 49a and guided to the main lumen 22 of the sheath body 2 so that each distal end portion is treated. Guided to the myocardial tissue. Further, a side injection tube is formed on the side portion of the sheath hub 49a, and a three-way cock 49c is attached to the side injection tube via a tube 49b. For example, a syringe or the like can be attached to the three-way stopcock 49c so that blood in the body can be sucked or a chemical solution can be sent into the body.

シース本体2の厚肉内には、メインルーメン22に略平行する一対のサブルーメン23a,23bが形成されている。サブルーメン23a,23bは、互いに180度対向した位置に形成されており、これらのサブルーメン23a,23b内には、ステンレス等の金属からなる第1ワイヤ5aおよび第2ワイヤ5bがそれぞれ挿通されている。   In the thick wall of the sheath body 2, a pair of sub-lumens 23 a and 23 b that are substantially parallel to the main lumen 22 are formed. The sub-lumens 23a and 23b are formed at positions opposed to each other by 180 degrees, and the first wire 5a and the second wire 5b made of metal such as stainless steel are inserted into the sub-lumens 23a and 23b, respectively. Yes.

シース本体2の遠位端(偏向部21の先端近傍)には、円環状のプルリング(リング部材)24がメインルーメン22内に内挿されるかたちで一体的に取り付けられており、プルリング24の180度対向位置には、第1ワイヤ5aおよび第2ワイヤ5bの遠位端が接続固定されている。   An annular pull ring (ring member) 24 is integrally attached to the distal end of the sheath body 2 (near the tip of the deflecting portion 21) so as to be inserted into the main lumen 22. The distal ends of the first wire 5a and the second wire 5b are connected and fixed at the opposite positions.

第1ワイヤ5aおよび第2ワイヤ5bの近位端は、シース本体2の近位端側に設けられた操作部3の内部においてシース本体2に設けられた側孔から引き出されて、操作部3(後述する回転操作部材31)にそれぞれ接続されている。操作部3はグリップ部4の先端(遠位端)側に設けられた保持部42(42a,42b)に保持されている。   Proximal ends of the first wire 5a and the second wire 5b are pulled out from a side hole provided in the sheath body 2 inside the operation portion 3 provided on the proximal end side of the sheath body 2, and the operation portion 3 is pulled out. (The rotation operation member 31 described later) is connected to each. The operation section 3 is held by a holding section 42 (42a, 42b) provided on the tip (distal end) side of the grip section 4.

グリップ部4は、図3〜図5に示すように、互いに略対称形状を有するグリップ表部材4aおよびグリップ裏部材4bからなり、操作部3を保持部42(42a,42b)においてグリップ表部材4aおよびグリップ裏部材4bで挟み込むかたちで回転自在に保持した状態で互いに一体化されている。シース本体2はグリップ部4の先端部43(43a,43b)の先端開口から内部に導かれる。なお、グリップ部4の材質は、特に限定されないが、熱可塑性樹脂であることが好ましく、例えば、ポリカーボネート、ポリアセタール、ポリアミドなどが用いられる。   As shown in FIGS. 3 to 5, the grip portion 4 includes a grip surface member 4 a and a grip back member 4 b that are substantially symmetrical with each other. In addition, they are integrated with each other in a state of being held rotatably by being sandwiched between grip back members 4b. The sheath body 2 is guided to the inside from the distal end opening of the distal end portion 43 (43a, 43b) of the grip portion 4. The material of the grip part 4 is not particularly limited, but is preferably a thermoplastic resin. For example, polycarbonate, polyacetal, polyamide, or the like is used.

グリップ表部材4aの保持部(第1保持部)42aには、図4および図6に示すように、その外側(図6において上側)の略中央部に略円形に凹陥した円形凹陥部45aが形成されており、その内側(図6において下側)の略中央部に略円形に陥没した円形凹陥部48aが形成されている。円形凹陥部45aおよび円形凹陥部48aの中央部には、貫通穴(第1貫通穴)46aが形成されている。円形凹陥部45aの先端部43a側の一部には、ノブ受け部47aが形成されている。   As shown in FIGS. 4 and 6, the holding portion (first holding portion) 42 a of the grip surface member 4 a has a circular recessed portion 45 a that is recessed in a substantially circular shape at a substantially central portion on the outer side (upper side in FIG. 6). A circular concave portion 48a is formed in a substantially central portion on the inner side (lower side in FIG. 6). A through hole (first through hole) 46a is formed at the center of the circular recessed portion 45a and the circular recessed portion 48a. A knob receiving portion 47a is formed on a part of the circular recessed portion 45a on the tip end portion 43a side.

保持部42aの貫通穴46aの内面の基端部側(先端部43aと反対側)には、貫通穴46aの中心軸AX1に対して、グリップ部4の軸方向に沿って角度θ1だけ傾斜した軸AX2を中心軸としたねじ山を有する部分雌ねじ部(第2雌ねじ部)44aが形成されている。(すなわち、部分雌ねじ部(第2雌ねじ部)44aの中心軸AX2は、後述するノブ部材6の雄ねじ部65が、後述する保持部(第2保持部)42bが存在する側と反対側から貫通穴(第1貫通穴)46aにねじ込まれたときに、ノブ部材6の頭部がシース本体2(カテーテルチューブ)の遠位端側に傾くように傾斜している。)部分雌ねじ部44aのねじ山の頂点角度は、本実施形態では25度としている。但し、部分雌ねじ部44aは、このピッチより小さくても、大きくてもよい。また、部分雌ねじ部44aに代えて、保持部42aの貫通穴46aに、1ピッチ以上のねじ山を有する雌ねじ部としてもよい。なお、ここでは部分雌ねじ部44aのねじ山の稜線は当然に円弧状となっているものとするが、近似的に直線状としてもよい。なお、角度θ1は、本実施形態では25度に設定している。   The base end side (the side opposite to the tip end portion 43a) of the inner surface of the through hole 46a of the holding portion 42a is inclined by an angle θ1 along the axial direction of the grip portion 4 with respect to the central axis AX1 of the through hole 46a. A partial female thread portion (second female thread portion) 44a having a thread with the axis AX2 as the central axis is formed. (That is, the central axis AX2 of the partial female thread portion (second female thread portion) 44a is penetrated from the side opposite to the side where the later-described holding portion (second holding portion) 42b exists by the male screw portion 65 of the knob member 6 described later. When screwed into the hole (first through hole) 46a, the head of the knob member 6 is inclined so as to incline toward the distal end side of the sheath body 2 (catheter tube).) Screw of the partial female screw portion 44a The peak angle of the mountain is 25 degrees in this embodiment. However, the partial female thread portion 44a may be smaller or larger than this pitch. Moreover, it is good also as an internal thread part which replaces with the partial internal thread part 44a and has the thread of 1 pitch or more in the through-hole 46a of the holding | maintenance part 42a. Here, the ridge line of the thread of the partial female thread portion 44a is naturally an arc shape, but it may be approximately linear. The angle θ1 is set to 25 degrees in this embodiment.

グリップ裏部材4bの保持部(第2保持部)42bには、図5および図7に示すように、その外側(図7において下側)の略中央部に略円形に凹陥した円形凹陥部45bが形成されており、その内側(図7において上側)の略中央部に略円形に凹陥した円形凹陥部48bが形成されている。円形凹陥部45bおよび円形凹陥部48bの中央部には、グリップ表部材4aの貫通穴46aに対応して、貫通穴(第2貫通穴)46bが形成されている。保持部42bの貫通穴46bの中心軸は、保持部42aの貫通穴46aの中心軸AX1に略一致している。   As shown in FIGS. 5 and 7, the holding portion (second holding portion) 42 b of the grip back member 4 b has a circular recessed portion 45 b that is recessed in a substantially circular shape at a substantially central portion on the outer side (lower side in FIG. 7). Is formed, and a circular recessed portion 48b that is recessed in a substantially circular shape is formed in a substantially central portion on the inner side (upper side in FIG. 7). A through hole (second through hole) 46b is formed at the center of the circular recessed part 45b and the circular recessed part 48b corresponding to the through hole 46a of the grip surface member 4a. The central axis of the through hole 46b of the holding part 42b substantially coincides with the central axis AX1 of the through hole 46a of the holding part 42a.

操作部3は、図8〜図10に示すように、固定操作部材38と、固定操作部材38に回転可能に支持された回転操作部材31とを概略備えて構成されている。固定操作部材38は、シース本体2が挿通される前方連通部38aおよび後方連通部(不図示)を備えている。また、固定操作部材38は、上下(図9および図10において上下方向)に貫通する略円形の貫通部(不図示)を備えている。   As shown in FIGS. 8 to 10, the operation unit 3 is configured to include a fixed operation member 38 and a rotation operation member 31 that is rotatably supported by the fixed operation member 38. The fixing operation member 38 includes a front communication portion 38a through which the sheath body 2 is inserted and a rear communication portion (not shown). The fixing operation member 38 includes a substantially circular penetrating portion (not shown) penetrating vertically (vertical direction in FIGS. 9 and 10).

回転操作部材31は、第1回転操作部材31aおよび第2回転操作部材31bから構成されている。第1回転操作部材31aは、略円板状の円板部と、左右に突出する一対の分割把持部32a,32aとを有している。分割把持部32a,32aには後述する第2回転操作部材31bの分割把持部32b,32bに形成された凸部に嵌合する凹部(不図示)がそれぞれ形成されている。第1回転操作部材31aの一方の面(図9および図10において上面)には、円形に陥没する円形陥没部33が形成されており、円形陥没部33には、一対の窓部34,34が形成されている。   The rotation operation member 31 includes a first rotation operation member 31a and a second rotation operation member 31b. The first rotation operation member 31a has a substantially disk-shaped disk part and a pair of split gripping parts 32a and 32a protruding left and right. The divided grip portions 32a and 32a are respectively formed with recesses (not shown) that fit into the convex portions formed on the split grip portions 32b and 32b of the second rotation operation member 31b described later. On one surface (the upper surface in FIGS. 9 and 10) of the first rotation operation member 31 a, a circular recessed portion 33 that is recessed in a circular shape is formed, and the circular recessed portion 33 has a pair of window portions 34 and 34. Is formed.

第1回転操作部材31aの中心部には貫通穴(第3貫通穴)35が形成されている。回転操作部材31の一方の面(図9および図10において上面)には、貫通穴35の周囲において該一方の面側(図9および図10において上側)に突出する環状突出部36aが形成されている。   A through hole (third through hole) 35 is formed at the center of the first rotation operation member 31a. On one surface (upper surface in FIGS. 9 and 10) of the rotation operation member 31, an annular projecting portion 36 a that protrudes to the one surface side (upper side in FIGS. 9 and 10) around the through hole 35 is formed. ing.

第2回転操作部材31bは、略円板状の円板部と、左右に突出する一対の分割把持部32b,32bとを有している。分割把持部32bには第1回転操作部材31aの分割把持部32a,32aに形成された凹部に嵌合する凸部(不図示)がそれぞれ形成されている。   The second rotation operation member 31b has a substantially disk-shaped disk part and a pair of divided gripping parts 32b and 32b protruding left and right. The split gripping portion 32b is formed with a convex portion (not shown) that fits into the concave portion formed in the split gripping portion 32a, 32a of the first rotation operation member 31a.

第2回転操作部材31bの中心部には貫通穴(第3貫通穴)35が形成されている。回転操作部材31bの該一方の面(図9および図10において下面)には、貫通穴35の周囲において下側(図9および図10において下側)に突出する環状突出部36bが形成されている。   A through hole (third through hole) 35 is formed at the center of the second rotation operation member 31b. On one surface (the lower surface in FIGS. 9 and 10) of the rotation operation member 31 b, an annular projecting portion 36 b that projects downward (downward in FIGS. 9 and 10) around the through hole 35 is formed. Yes.

回転操作部材31(第2回転操作部材31b)の貫通穴35の内周には、その180度対向位置にそれぞれ中心に向かって突出する突起部37,37が形成されている。これらの突起部37,37の幅は、後述する雌ねじ部73に形成されたスリット部74の幅よりも僅かに小さいに寸法に設定されている。これらの突起部37,37は、特に限定されないが、本実施形態では、図8に示すように、回転操作部材31の一対の把持部32,32の中心を通る線L1に対して、突起部37,37の中心を通る線L2のなす角度θ2が48度となるように形成されている。なお、突起部37の数は、本実施形態のように2つが最適であるが、1つでもよい。   On the inner periphery of the through hole 35 of the rotation operation member 31 (second rotation operation member 31b), projections 37 and 37 that protrude toward the center are formed at positions that face each other at 180 degrees. The widths of the protrusions 37 and 37 are set to be slightly smaller than the width of a slit portion 74 formed in the female screw portion 73 described later. Although these protrusion parts 37 and 37 are not specifically limited, in this embodiment, as shown in FIG. 8, with respect to the line L1 which passes along the center of a pair of holding parts 32 and 32 of the rotation operation member 31, it is a protrusion part. The angle θ2 formed by the line L2 passing through the centers of 37 and 37 is 48 degrees. The optimal number of protrusions 37 is two as in the present embodiment, but may be one.

固定操作部材38の一方の面(図9および図10において上面)側に第1回転操作部材31aを配置し、他方の面(図9および図10において下面)側に第2回転操作部材31bを配置して、第1回転操作部材31aと第2回転操作部材31bとで固定操作部材38を挟み込み、第1回転操作部材31aの分割把持部32aに設けられた凹部と第2回転操作部材31bの分割把持部32bに設けられた凸部とを嵌合させることにより、回転操作部材31a,31bが固定操作部材38に回転可能に取り付けられる。   The first rotation operation member 31a is disposed on one surface (upper surface in FIGS. 9 and 10) of the fixed operation member 38, and the second rotation operation member 31b is disposed on the other surface (lower surface in FIGS. 9 and 10). The fixed operation member 38 is sandwiched between the first rotation operation member 31a and the second rotation operation member 31b, and the concave portion provided in the divided gripping portion 32a of the first rotation operation member 31a and the second rotation operation member 31b are arranged. The rotation operation members 31 a and 31 b are rotatably attached to the fixed operation member 38 by fitting the projections provided on the divided gripping portion 32 b.

このように構成された操作部3がグリップ表部材4aの保持部42aとグリップ裏部材4bの保持部42bとで挟み込まれて一体化された際には、固定操作部材38はグリップ表部材4aおよびグリップ裏部材4bに固定されるとともに、環状突出部36aが保持部42aの円形凹陥部48aに僅かな間隙をもって遊嵌され、環状突出部36bが保持部42bの円形凹陥部48bに僅かな間隙をもって遊嵌されることにより、回転操作部材31がグリップ部4(保持部42a,42b)に対して回転自在に保持されるようになっている。   When the operation unit 3 configured as described above is sandwiched and integrated between the holding portion 42a of the grip surface member 4a and the holding portion 42b of the grip back member 4b, the fixed operation member 38 is connected to the grip surface member 4a and the grip surface member 4a. While being fixed to the grip back member 4b, the annular projecting portion 36a is loosely fitted in the circular recessed portion 48a of the holding portion 42a with a slight gap, and the annular protruding portion 36b has a slight gap in the circular recessed portion 48b of the holding portion 42b. By loosely fitting, the rotation operation member 31 is rotatably held with respect to the grip part 4 (holding parts 42a and 42b).

なお、回転操作部材31(第1回転操作部材31a、第2回転操作部材31b)および固定操作部材38の材質は、特に限定されないが、熱可塑性樹脂であることが好ましく、例えば、ポリカーボネート、ポリアセタール、ポリアミドなどが用いられる。   The material of the rotation operation member 31 (first rotation operation member 31a, second rotation operation member 31b) and fixed operation member 38 is not particularly limited, but is preferably a thermoplastic resin, for example, polycarbonate, polyacetal, Polyamide or the like is used.

操作部3がグリップ表部材4aの保持部42aとグリップ裏部材4bの保持部42bとで挟み込まれて組み上げられた状態で、先端部43(43a,43b)の先端開口から導入されたシース本体2の近位端側は、固定操作部材38の前方連通部38aおよび後方連通部を通過して、グリップ部4の近位端にあるシースハブ4aまで導かれる。   The sheath body 2 introduced from the distal end opening of the distal end portion 43 (43a, 43b) in a state where the operation portion 3 is sandwiched and assembled between the retaining portion 42a of the grip front member 4a and the retaining portion 42b of the grip back member 4b. The proximal end side of the fixed member is guided to the sheath hub 4 a at the proximal end of the grip portion 4 through the front communication portion 38 a and the rear communication portion of the fixed operation member 38.

ノブ部材6は、図11に示すように、首部64の一端部に頭部を、他端部に雄ねじ部65を備えている。頭部は、つまみ部61、円板部62および円形突出部63から構成されている。首部64は、保持部42aの貫通穴46aよりも小径に設定されているとともに、後述する回転軸部材7の雌ねじ部73の内径よりも小径に設定されている。円形突出部63は、保持部42aの貫通穴46aよりも大きい外径を有しており、保持部42aの円形凹陥部45aに僅かな間隙をもって遊嵌可能となっている。雄ねじ部65は、保持部42aの貫通穴46aよりも僅かに大きい外径を有し、後述する回転軸部材7の雌ねじ部74に螺合されるねじ山を有している。ノブ部材6の材質としては、例えばアルミニウムやステンレスが用いられる。   As shown in FIG. 11, the knob member 6 includes a head at one end of the neck portion 64 and a male screw portion 65 at the other end. The head is composed of a knob portion 61, a disc portion 62, and a circular protrusion 63. The neck portion 64 is set to have a smaller diameter than the through hole 46a of the holding portion 42a, and is set to have a smaller diameter than an inner diameter of a female screw portion 73 of the rotary shaft member 7 described later. The circular protrusion 63 has a larger outer diameter than the through hole 46a of the holding portion 42a, and can be loosely fitted in the circular recess 45a of the holding portion 42a with a slight gap. The male screw portion 65 has an outer diameter slightly larger than the through hole 46a of the holding portion 42a, and has a thread that is screwed into a female screw portion 74 of the rotary shaft member 7 described later. As the material of the knob member 6, for example, aluminum or stainless steel is used.

回転軸部材7は、図12〜図14に示すように、略円柱状の軸部71の一端部にフランジ部72を、他端部に雌ねじ部(第1雌ねじ部)73を有している。軸部71は、保持部42bの貫通穴46bよりも小径に形成されているとともに、回転操作部材31の貫通穴35に設けられた一対の突起部37,37の互いの対向する間隔よりも僅かに小さい外径に設定されている。   As shown in FIGS. 12 to 14, the rotary shaft member 7 has a flange portion 72 at one end portion of a substantially cylindrical shaft portion 71 and a female screw portion (first female screw portion) 73 at the other end portion. . The shaft portion 71 is formed to have a smaller diameter than the through hole 46 b of the holding portion 42 b and is slightly smaller than the distance between the pair of projecting portions 37, 37 provided in the through hole 35 of the rotation operation member 31. Is set to a small outer diameter.

フランジ部72は、略円板状に形成されており、その外径が保持部42bの貫通穴46bよりも大径に設定されているとともに、保持部42bの円形凹陥部45bに僅かな間隙をもって遊嵌するように形成されている。雌ねじ部73は略円筒形状に形成され、その外径は、軸部71よりも大径であり、保持部42bの貫通穴46bよりも僅かに小径であり、回転操作部材31の貫通穴35に僅かな間隙をもって遊嵌するように形成されている。   The flange portion 72 is formed in a substantially disc shape, and its outer diameter is set to be larger than the through hole 46b of the holding portion 42b, and there is a slight gap in the circular recessed portion 45b of the holding portion 42b. It is formed to fit loosely. The female screw portion 73 is formed in a substantially cylindrical shape, and its outer diameter is larger than that of the shaft portion 71, slightly smaller than the through hole 46 b of the holding portion 42 b, and is formed in the through hole 35 of the rotation operation member 31. It is formed so as to be loosely fitted with a slight gap.

雌ねじ部73の内周にはノブ部材6の雄ねじ部64が螺合されるねじ山が形成されている。雌ねじ部73には、組み上げられた際に、シース本体2の近位端側の部分が通過するためのスリット部74が形成されている。このスリット部74の幅は、シース本体2の外形を考慮して、これが通過し得る程度の寸法に設定されている。回転軸部材7の材質としては、ノブ部材6と同様に、例えばアルミニウムやステンレスが用いられる。   On the inner periphery of the female screw portion 73, a screw thread to which the male screw portion 64 of the knob member 6 is screwed is formed. The female thread portion 73 is formed with a slit portion 74 through which a portion on the proximal end side of the sheath body 2 passes when assembled. The width of the slit portion 74 is set to such a size that it can pass through in consideration of the outer shape of the sheath body 2. As the material of the rotating shaft member 7, for example, aluminum or stainless steel is used similarly to the knob member 6.

上述したグリップ部4を組み立てる際には、図3に示した状態から、操作部3をグリップ表部材4aの保持部42aとグリップ裏部材4bの保持部42bとで挟み込んで、操作部3をグリップ部4に保持した状態で一体化する。   When assembling the grip part 4 described above, the operation part 3 is sandwiched between the holding part 42a of the grip front member 4a and the holding part 42b of the grip back member 4b from the state shown in FIG. The unit 4 is integrated while being held in the part 4.

その後、図15に示すように、グリップ部4bの貫通穴46bから、回転軸部材7の雌ねじ部73側を挿入する。このとき、回転操作部材31を、図1に示したニュートラル状態(回転操作部材31の一対の把持部32,32の中心を結ぶ線がグリップ部4の軸方向に対して略直交するように設定した状態)から45度程度時計方向に回転した状態とし(すなわち、一対の突起部37,37の中心を結ぶ線L2がシース本体2の延在方向に略一致した状態とし)、この状態で、回転操作部材31の貫通穴35に形成された一対の突起部37,37が回転軸部材7の雌ねじ部73のスリット部74を通過するとともに、シース本体2が該スリット部74内を通過するように、回転軸部材7の中心軸周りの回転位置を調整して、雌ねじ部73を回転操作部材31の貫通穴35に挿入し、回転軸部材7のフランジ部72を保持部42bの円形凹陥部45bに位置させる。   Thereafter, as shown in FIG. 15, the female screw portion 73 side of the rotating shaft member 7 is inserted from the through hole 46 b of the grip portion 4 b. At this time, the rotation operation member 31 is set in the neutral state shown in FIG. 1 (a line connecting the centers of the pair of grip portions 32, 32 of the rotation operation member 31 is substantially orthogonal to the axial direction of the grip portion 4. In a state in which the center of the pair of protrusions 37, 37 is substantially aligned with the extending direction of the sheath body 2, and in this state, A pair of projections 37, 37 formed in the through hole 35 of the rotation operation member 31 passes through the slit portion 74 of the female screw portion 73 of the rotary shaft member 7, and the sheath body 2 passes through the slit portion 74. Then, the rotational position around the central axis of the rotary shaft member 7 is adjusted, the female screw portion 73 is inserted into the through hole 35 of the rotary operation member 31, and the flange portion 72 of the rotary shaft member 7 is inserted into the circular recessed portion of the holding portion 42b. Located at 45b To.

回転軸部材7をこの状態まで挿入すると、回転操作部材31の突起部37,37は、雌ねじ部73のスリット部74を通過して、軸部71の一端部(図15において上端部)に至るので、この状態で、回転操作部材31を反時計方向に回転させると、突起部37,37が雌ねじ部73の軸部71側の端面(段差面)に干渉し、回転軸部材7が保持部42b(回転操作部材31)から抜け出せない状態となる。   When the rotating shaft member 7 is inserted to this state, the protrusions 37 and 37 of the rotating operation member 31 pass through the slit portion 74 of the female screw portion 73 and reach one end portion (upper end portion in FIG. 15) of the shaft portion 71. Therefore, when the rotation operation member 31 is rotated counterclockwise in this state, the projecting portions 37 and 37 interfere with the end surface (step surface) of the female screw portion 73 on the shaft portion 71 side, and the rotation shaft member 7 is held by the holding portion. 42b (the rotation operation member 31) cannot be removed.

次いで、ノブ部材6を保持部42に装着する。まず、図16に示すように、ノブ部材6の中心軸AX3を保持部42aの中心軸AX1に対して先端部43a側に傾けつつ、円形突出部63の先端部43側の一部をノブ受け部47aに位置させ、雄ねじ部65の先端部43a側の一部を貫通穴46aに斜めに挿入する。この状態では、図17に示すように、ノブ部材6の中心軸AX3は、保持部42aの部分雌ねじ部44aの中心軸AX2に略一致した状態となる。また、この状態では、図17に示すように、雄ねじ部65の基端部側(先端部43と反対側)の一部は、保持部42aの部分雌ねじ部44aに干渉し、このままではこれ以上の挿入はできない。   Next, the knob member 6 is attached to the holding portion 42. First, as shown in FIG. 16, while the central axis AX3 of the knob member 6 is inclined toward the distal end portion 43a with respect to the central axis AX1 of the holding portion 42a, a part of the circular protrusion 63 on the distal end 43 side is knob-received. Positioned on the portion 47a, a part of the male screw portion 65 on the tip end portion 43a side is inserted obliquely into the through hole 46a. In this state, as shown in FIG. 17, the center axis AX3 of the knob member 6 is substantially in agreement with the center axis AX2 of the partial female thread portion 44a of the holding portion 42a. Further, in this state, as shown in FIG. 17, a part of the base end portion side (the side opposite to the tip portion 43) of the male screw portion 65 interferes with the partial female screw portion 44a of the holding portion 42a. Cannot be inserted.

この状態から、ノブ部材6を回転(ここでは時計方向とする)させて、雄ねじ部65を部分雌ねじ部44aにねじ込むと、図18に示すように、雄ねじ部65が部分雌ねじ部44aに螺合し、雄ねじ部65の基端部側の一部が回転に応じて貫通穴46a内に入り込み、ノブ部材7の中心軸AX3の保持部42aの中心軸AX1に対する傾斜角度が徐々に小さくなる。ノブ部材7をさらに回転させると、図19に示すように、雄ねじ部65の基端部側の一部が部分雌ねじ部44aを通過し、雄ねじ部65の全体が貫通穴46aを通過して、円形凹陥部48aに至り、ノブ部材6の中心軸AX3が保持部42aの中心軸AX1に略一致する。この状態では、貫通穴46aの内径よりも、雄ねじ部65の外径の方が大きいため、ノブ部材6は保持部42aから抜け出せない状態となる。   From this state, when the knob member 6 is rotated (clockwise here) and the male screw portion 65 is screwed into the partial female screw portion 44a, the male screw portion 65 is screwed into the partial female screw portion 44a as shown in FIG. Then, a part of the base end portion side of the male screw portion 65 enters the through hole 46a according to the rotation, and the inclination angle of the central axis AX3 of the knob member 7 with respect to the central axis AX1 of the holding portion 42a gradually decreases. When the knob member 7 is further rotated, as shown in FIG. 19, a part of the base end portion side of the male screw portion 65 passes through the partial female screw portion 44a, and the entire male screw portion 65 passes through the through hole 46a. The circular concave portion 48a is reached, and the central axis AX3 of the knob member 6 substantially coincides with the central axis AX1 of the holding portion 42a. In this state, since the outer diameter of the male screw portion 65 is larger than the inner diameter of the through hole 46a, the knob member 6 cannot be removed from the holding portion 42a.

この状態で、雄ねじ部65の先端が回転軸部材7の雌ねじ部73の先端に至るので、ノブ部材6を回転(ここでは時計方向とする)させて、雄ねじ部65を雌ねじ部73に螺合させ、図20に示すように、ノブ部材6の円形突出部63が保持部42aの円形凹陥部45aの底面に当接するまでねじ込み、組み立てを完了する。   In this state, since the tip of the male screw portion 65 reaches the tip of the female screw portion 73 of the rotating shaft member 7, the knob member 6 is rotated (clockwise here), and the male screw portion 65 is screwed into the female screw portion 73. As shown in FIG. 20, the knob member 6 is screwed until the circular protrusion 63 of the knob member 6 comes into contact with the bottom surface of the circular recess 45a of the holding portion 42a, and the assembly is completed.

図1に示したニュートラル状態では、第1ワイヤ5aおよび第2ワイヤ5bが両者とも無張力状態(または略均等に緩く緊張した状態)となり、シース2の先端の偏向部21は、同図に示す通り、直線状に延びた状態となる。   In the neutral state shown in FIG. 1, both the first wire 5a and the second wire 5b are in a tension-free state (or in a state where the wire 2 is loosened almost uniformly), and the deflection portion 21 at the distal end of the sheath 2 is shown in FIG. It will be in the state extended straight.

このニュートラル状態から、回転操作部材31を第1方向(図1において矢印B1の方向)に回転させると、この回転に伴い、第1ワイヤ5aが引っ張られ、第2ワイヤ5bが緩められることにより、先端の偏向部21が図1において矢印B3に示すように偏向される。   When the rotation operation member 31 is rotated in the first direction (the direction of the arrow B1 in FIG. 1) from this neutral state, the first wire 5a is pulled and the second wire 5b is loosened along with this rotation. The leading deflection portion 21 is deflected as shown by an arrow B3 in FIG.

これと反対に、回転操作部材31を第2方向(図1において矢印B2方向)に回転させると、第1ワイヤ5aが緩められ、第2ワイヤ5bが引っ張られることにより、先端の偏向部21が図1において矢印B4に示すように偏向される。   On the contrary, when the rotation operation member 31 is rotated in the second direction (the direction of the arrow B2 in FIG. 1), the first wire 5a is loosened and the second wire 5b is pulled, so that the deflection unit 21 at the tip is moved. In FIG. 1, it is deflected as indicated by an arrow B4.

シース2の先端の偏向部21を偏向させた状態で、偏向部21の形状を固定したい場合には、つまみ部61を把持してノブ部材6を時計方向に回転させることにより、図20に示すように、ノブ部材6の雄ねじ部65が回転軸部材7の雌ねじ部73にねじ込まれ、ノブ部材6の円形突出部63と回転軸部材7のフランジ部72とにより、保持部42aと保持部42bとが互いに近接する方向に押圧され、これに伴い、回転操作部材31が保持部42aと保持部42bとで強固に挟持される。その結果、回転操作部材31が現在位置で固定され、シース2の先端の偏向部21の形状が固定される。   When it is desired to fix the shape of the deflection unit 21 while the deflection unit 21 at the distal end of the sheath 2 is deflected, the knob member 61 is gripped and the knob member 6 is rotated in the clockwise direction, as shown in FIG. As described above, the male threaded portion 65 of the knob member 6 is screwed into the female threaded portion 73 of the rotary shaft member 7, and the holding portion 42 a and the holding portion 42 b are formed by the circular protrusion 63 of the knob member 6 and the flange portion 72 of the rotary shaft member 7. Are pressed in directions approaching each other, and accordingly, the rotation operation member 31 is firmly held between the holding portion 42a and the holding portion 42b. As a result, the rotation operation member 31 is fixed at the current position, and the shape of the deflection portion 21 at the distal end of the sheath 2 is fixed.

シース2の先端の偏向部21の形状の固定を解除したい場合(偏向状態を調整したい場合)には、上記と反対に、つまみ部61を把持してノブ部材6を反時計方向に回転させることにより、ノブ部材6の雄ねじ部65の回転軸部材7の雌ねじ部73に対するねじ込みが緩み、保持部42aと保持部42bとの近接する方向への押圧が解除され、回転操作部材31が保持部42aと保持部42bとにより緩く挟持された状態となる。その結果、回転操作部材31が回転し得る状態となり、シース2の先端の偏向部21の形状の固定が解除されて、把持部32を把持して回転操作部材31を回転操作することにより偏向部21の偏向状態を調整することができる。   When it is desired to release the fixed shape of the deflection portion 21 at the distal end of the sheath 2 (when the deflection state is to be adjusted), the knob member 61 is gripped and the knob member 6 is rotated counterclockwise, contrary to the above. Accordingly, the screwing of the male screw portion 65 of the knob member 6 into the female screw portion 73 of the rotating shaft member 7 is loosened, the pressing in the direction in which the holding portion 42a and the holding portion 42b approach each other is released, and the rotation operation member 31 is held by the holding portion 42a. And the holding portion 42b. As a result, the rotation operation member 31 can rotate, the shape of the deflection unit 21 at the distal end of the sheath 2 is released from being fixed, the grip unit 32 is gripped, and the rotation operation member 31 is rotated. 21 deflection states can be adjusted.

本実施形態によると、ノブ部材6の雄ねじ部65の外径は、保持部42aの貫通穴46aよりも大きいため、ノブ部材6を緩めすぎて、ノブ部材6の雄ねじ部65の回転軸部材7の雌ねじ部73に対する螺合が完全に解除されてしまった場合でも、ノブ部材6が保持部42(グリップ部4)から脱落することがない。したがって、このような場合であっても、ノブ部材6の雄ねじ部65を回転軸部材7の雌ねじ部73に再度ねじ込むことにより、元の状態に容易に戻すことができる。なお、ノブ部材6を保持部42から取り外すことが必要となった場合には、図16〜図19に示した手順と逆の手順を行うことにより、これを行うことができる。   According to the present embodiment, since the outer diameter of the male screw portion 65 of the knob member 6 is larger than the through hole 46a of the holding portion 42a, the knob member 6 is loosened too much to rotate the rotary shaft member 7 of the male screw portion 65 of the knob member 6. Even when the threaded engagement with the female thread portion 73 is completely released, the knob member 6 does not fall off the holding portion 42 (grip portion 4). Therefore, even in such a case, it is possible to easily return to the original state by screwing the male screw portion 65 of the knob member 6 into the female screw portion 73 of the rotary shaft member 7 again. In addition, when it becomes necessary to remove the knob member 6 from the holding | maintenance part 42, this can be performed by performing the procedure reverse to the procedure shown in FIGS.

また、本実施形態では、部分雌ねじ部44aの中心軸AX2が、貫通穴46aの中心軸AX1に対して傾斜しているので、ノブ部材6を緩めすぎて、ノブ部材6の雄ねじ部65の回転軸部材7の雌ねじ部73に対する螺合が完全に解除された後に、それに気が付かずにノブ部材6をさらに回転させてしまった場合であっても、ノブ部材6の雄ねじ部65が部分雌ねじ部44を通過してしまう可能性が小さく、ノブ部材6が保持部42(グリップ部4)から脱落する可能性が小さくなっている。   In the present embodiment, since the central axis AX2 of the partial female screw portion 44a is inclined with respect to the central axis AX1 of the through hole 46a, the knob member 6 is loosened too much, and the male screw portion 65 of the knob member 6 is rotated. Even when the knob member 6 is further rotated without being noticed after the screwing of the shaft member 7 with respect to the female screw portion 73 is completely released, the male screw portion 65 of the knob member 6 becomes the partial female screw portion 44. The knob member 6 is less likely to fall off the holding portion 42 (grip portion 4).

また、本実施形態では、部分雌ねじ部44aの中心軸AX2が、ノブ部材6の雄ねじ部65が、保持部42bが存在する側と反対側から貫通穴46aにねじ込まれたときに、ノブ部材6の頭部がシース本体2の遠位端側に傾くように傾斜しているので、ノブ部材6が保持部42(グリップ部4)から脱落する可能性がさらに小さくなっている。なぜなら、カテーテルシース1の使用者(医師)は、シース2の汚染を防止するためにシース2を下側に向けないように配慮しながらカテーテルシース1を取り扱うので、重力によってノブ部材6が脱落する方向に傾く可能性が小さくなるからである。   In the present embodiment, the central axis AX2 of the partial female screw portion 44a is adjusted so that the male screw portion 65 of the knob member 6 is screwed into the through hole 46a from the side opposite to the side where the holding portion 42b exists. Therefore, the possibility that the knob member 6 falls off the holding portion 42 (grip portion 4) is further reduced. This is because the user (physician) of the catheter sheath 1 handles the catheter sheath 1 while taking care not to point the sheath 2 downward in order to prevent contamination of the sheath 2, so that the knob member 6 falls off due to gravity. This is because the possibility of tilting in the direction is reduced.

また、ノブ部材6を緩めすぎて、ノブ部材6の雄ねじ部65の回転軸部材7の雌ねじ部73に対する螺合が完全に解除されてしまった場合でも、回転軸部材7は、保持部42bの貫通穴46bおよび回転操作部材31の貫通穴35に挿入された状態で、回転操作部材31の貫通穴35に設けられた一対の突起部37,37により、雌ねじ部73の軸部71側の端面(段差面)において軸方向に移動できないように係止されているため、回転軸部材7が保持部42から脱落する可能性も小さくなっている。   Further, even when the knob member 6 is loosened too much and the screwing of the male threaded portion 65 of the knob member 6 to the female threaded portion 73 of the rotating shaft member 7 is completely released, the rotating shaft member 7 remains in the holding portion 42b. The end surface of the female screw portion 73 on the shaft portion 71 side by a pair of protrusions 37 and 37 provided in the through hole 35 of the rotation operation member 31 in a state of being inserted into the through hole 46 b and the through hole 35 of the rotation operation member 31. Since it is locked so that it cannot move in the axial direction on the (step surface), the possibility that the rotating shaft member 7 falls off the holding portion 42 is also reduced.

なお、回転軸部材7を保持部42から取り外すことが必要となった場合には、回転軸部材7の雌ねじ部73のスリット部74が突起部37,37に対応する位置となるように、回転操作部材31または回転軸部材7を回転させることにより、回転軸部材7を引き抜くことができる。   When it is necessary to remove the rotary shaft member 7 from the holding portion 42, the rotary shaft member 7 is rotated so that the slit portion 74 of the female screw portion 73 of the rotary shaft member 7 is at a position corresponding to the protrusions 37 and 37. By rotating the operation member 31 or the rotating shaft member 7, the rotating shaft member 7 can be pulled out.

以上説明した実施形態は、本発明の理解を容易にするために記載されたものであって、本発明を限定するために記載されたものではない。したがって、上述した実施形態に開示された各要素は、本発明の技術的範囲に属する全ての設計変更や均等物をも含む趣旨である。   The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the embodiment described above is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

例えば、上述した実施形態では、部分雌ねじ部44aの中心軸AX2は、ノブ部材6の雄ねじ部65が、保持部(第2保持部)42bが存在する側と反対側から貫通穴(第1貫通穴)46aにねじ込まれたときに、ノブ部材6の頭部がシース本体2(カテーテルチューブ)の遠位端側に傾くように設定したが、これに限定されず、同様のときに、ノブ部材6の頭部がシース本体2(カテーテルチューブ)の近位端側に傾くように設定し、あるいは他の方向に傾くように設定してもよい。   For example, in the above-described embodiment, the central axis AX2 of the partial female screw portion 44a is such that the male screw portion 65 of the knob member 6 has a through hole (first through hole) from the side opposite to the side where the holding portion (second holding portion) 42b exists. The hole) is set so that the head of the knob member 6 is inclined toward the distal end side of the sheath body 2 (catheter tube) when screwed into the hole 46a. However, the present invention is not limited to this. The head of 6 may be set to tilt toward the proximal end side of the sheath body 2 (catheter tube), or may be set to tilt in the other direction.

1…カテーテルシース
2…シース本体
21…偏向部
22…メインルーメン
3…操作部
31…回転操作部材
31a…第1回転操作部材
31b…第2回転操作部材
32…把持部
35…貫通穴(第3貫通穴)
36a,36b…環状突出部
37…突起部
38…固定操作部材
4…グリップ部
42(42a,42b)…保持部(第1保持部、第2保持部)
43(43a,43b)…先端部
44a…部分雌ねじ部(第2雌ねじ部)
45a,45b…円形凹陥部
46a,46b…貫通穴(第1貫通穴、第2貫通穴)
47a…ノブ受け部
48a,48b…円形凹陥部
5a,5b…ワイヤ
6…ノブ部材
61…つまみ部
62…円板部
63…円形突出部
64…首部
65…雄ねじ部
7…回転軸部材
71…軸部
72…フランジ部
73…雌ねじ部(第1雌ねじ部)
74…スリット部
DESCRIPTION OF SYMBOLS 1 ... Catheter sheath 2 ... Sheath body 21 ... Deflection part 22 ... Main lumen 3 ... Operation part 31 ... Rotation operation member 31a ... 1st rotation operation member 31b ... 2nd rotation operation member 32 ... Gripping part 35 ... Through-hole (3rd Through hole)
36a, 36b ... annular protrusion 37 ... projection 38 ... fixed operation member 4 ... grip part 42 (42a, 42b) ... holding part (first holding part, second holding part)
43 (43a, 43b) ... tip end portion 44a ... partial female screw portion (second female screw portion)
45a, 45b ... circular recess 46a, 46b ... through hole (first through hole, second through hole)
47a ... Knob receiving part 48a, 48b ... Circular recessed part 5a, 5b ... Wire 6 ... Knob member 61 ... Knob part 62 ... Disc part 63 ... Circular protrusion 64 ... Neck part 65 ... Male screw part 7 ... Rotating shaft member 71 ... Shaft Part 72 ... Flange part 73 ... Female thread part (first female thread part)
74 ... Slit part

Claims (3)

カテーテルチューブと、前記カテーテルチューブの近位端側に設けられた操作部とを備えた先端可動カテーテルであって、
前記操作部は、
その中心部に第1貫通穴を有する第1保持部と、
その中心部に前記第1貫通穴に対応する第2貫通穴を有する第2保持部と、
その中心部に前記第1貫通穴および前記第2貫通穴に対応する第3貫通穴を有し、前記第1保持部および前記第2保持部に挟み込まれた状態で、該第1保持部および該第2保持部に回転自在に保持された略円板状の回転操作部材と、
略円柱状の軸部の一端部に前記第2貫通穴よりも大きいフランジ部を、他端部に第1雌ねじ部を有し、該第1雌ねじ部が前記第2貫通穴を介して前記第3貫通穴に挿入された回転軸部材と、
前記第1貫通穴よりも小径の首部の一端部に前記第1貫通穴よりも大きい頭部を、他端部に該第1貫通穴よりも大きい外径を有し、前記第1雌ねじ部に螺合される雄ねじ部を有するノブ部材とを備え、
前記第1貫通穴の内周の少なくとも一部に、前記雄ねじ部をねじ込むことにより前記雄ねじ部が前記第1貫通穴を通過することを可能とするねじ山を有する第2雌ねじ部を設け、前記第2雌ねじ部が、前記第1雌ねじ部の中心軸に対して傾斜した中心軸を有することを特徴とする先端可動カテーテル。
A tip movable catheter provided with a catheter tube and an operation part provided on the proximal end side of the catheter tube,
The operation unit is
A first holding part having a first through hole in its central part;
A second holding portion having a second through hole corresponding to the first through hole at the center thereof;
The first holding portion and the third through hole corresponding to the first through hole and the second through hole are sandwiched between the first holding portion and the second holding portion. A substantially disk-shaped rotation operation member rotatably held by the second holding portion;
A flange portion larger than the second through hole is provided at one end portion of the substantially cylindrical shaft portion, and a first female screw portion is provided at the other end portion, and the first female screw portion is inserted into the first through the second through hole. A rotating shaft member inserted into the three through holes;
A head portion larger than the first through hole is formed at one end portion of the neck portion having a smaller diameter than the first through hole, and an outer diameter larger than the first through hole is formed at the other end portion. A knob member having a male screw portion to be screwed,
A second female screw portion having a thread that allows the male screw portion to pass through the first through hole by screwing the male screw portion into at least a part of the inner periphery of the first through hole , The distal movable catheter characterized in that the second female threaded portion has a central axis inclined with respect to the central axis of the first female threaded portion .
前記第2雌ねじ部の前記中心軸は、前記ノブ部材の前記雄ねじ部が、前記第2保持部が存在する側と反対側から前記第1貫通穴にねじ込まれたときに、前記ノブ部材の前記頭部が前記カテーテルチューブの遠位端側に傾くように傾斜していることを特徴とする請求項1に記載の先端可動カテーテル。 The central axis of the second female threaded portion is such that the male threaded portion of the knob member is screwed into the first through hole from the side opposite to the side where the second holding portion is present. The tip movable catheter according to claim 1 , wherein the head is inclined so as to incline toward the distal end side of the catheter tube. 前記第1雌ねじ部の外径よりも前記軸部の外径を小径に設定し、
前記第1雌ねじ部に前記軸部と反対側の端部から該軸部まで至るスリット部を設け、
前記第3貫通穴の内周に、前記第1雌ねじ部が該第3貫通穴に挿入される際には前記スリット部を通過し、完全に挿入された状態では前記軸部に位置するように、内側を指向した突起部を設けたことを特徴とする請求項1または2に記載の先端可動カテーテル。
Setting the outer diameter of the shaft portion to be smaller than the outer diameter of the first female screw portion;
The first female thread portion is provided with a slit portion extending from the end opposite to the shaft portion to the shaft portion,
In the inner periphery of the third through hole, when the first female screw portion is inserted into the third through hole, it passes through the slit portion, and when fully inserted, it is positioned at the shaft portion. The tip movable catheter according to claim 1 or 2 , further comprising a protruding portion directed inward.
JP2015060313A 2015-03-24 2015-03-24 Tip movable catheter Active JP6464861B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015060313A JP6464861B2 (en) 2015-03-24 2015-03-24 Tip movable catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015060313A JP6464861B2 (en) 2015-03-24 2015-03-24 Tip movable catheter

Publications (2)

Publication Number Publication Date
JP2016179007A JP2016179007A (en) 2016-10-13
JP6464861B2 true JP6464861B2 (en) 2019-02-06

Family

ID=57131348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015060313A Active JP6464861B2 (en) 2015-03-24 2015-03-24 Tip movable catheter

Country Status (1)

Country Link
JP (1) JP6464861B2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0716898Y2 (en) * 1989-04-24 1995-04-19 ソニー株式会社 Screw support structure
JP2001280330A (en) * 2000-03-30 2001-10-10 Nuclear Fuel Ind Ltd Drop preventing device at loosened state of fastening bolt
JP5360804B2 (en) * 2008-10-17 2013-12-04 日本ライフライン株式会社 Catheter handle
JP5535260B2 (en) * 2012-03-19 2014-07-02 日本ライフライン株式会社 Catheter handle

Also Published As

Publication number Publication date
JP2016179007A (en) 2016-10-13

Similar Documents

Publication Publication Date Title
US9913684B2 (en) Steerable ablation catheter for renal denervation
JP3162588U (en) Tip movable catheter
US9498602B2 (en) Guided intravascular catheter sheath having bi-directional steering assembly
US9907570B2 (en) Steerable medical devices
JP4933098B2 (en) Catheter design that facilitates positioning in the tissue to be diagnosed or processed
US6066126A (en) Precurved, dual curve cardiac introducer sheath
US7819866B2 (en) Ablation catheter and electrode
EP2073737B1 (en) Steerable sheath access device assembly
US10166066B2 (en) Epicardial ablation catheter and method of use
US7235070B2 (en) Ablation fluid manifold for ablation catheter
US6200315B1 (en) Left atrium ablation catheter
US9351789B2 (en) Adjustable catheter for ostial, septal, and roof ablation in atrial fibrillation patients
US7789877B2 (en) Ablation catheter electrode arrangement
US20150045696A1 (en) Steerable dilator
JPH10507678A (en) Steerable electrode catheter
WO2019203061A1 (en) Movable catheter
JP2003299669A (en) Bipolar-type high frequency hemostatic forceps for endoscope
US8958861B2 (en) Electrophysiology catheter handle having accessible interior
JP2021510326A (en) Equipment and accessories for perforated endoscope access and ablation systems
US20220110577A1 (en) Guiding sheath with distal tip locator
JP6464861B2 (en) Tip movable catheter
JP2017176604A (en) Distal end movable catheter
US20220152357A1 (en) Steerable catheter
JP7523073B2 (en) Steerable Catheter
JP2017113209A (en) Catheter assembly

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20171109

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20180105

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20180111

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20180720

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180731

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20180921

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20181129

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: 20181211

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20181224

R150 Certificate of patent or registration of utility model

Ref document number: 6464861

Country of ref document: JP

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