JP2003024453A - Tubular tissue reinforcing member - Google Patents
Tubular tissue reinforcing memberInfo
- Publication number
- JP2003024453A JP2003024453A JP2001216712A JP2001216712A JP2003024453A JP 2003024453 A JP2003024453 A JP 2003024453A JP 2001216712 A JP2001216712 A JP 2001216712A JP 2001216712 A JP2001216712 A JP 2001216712A JP 2003024453 A JP2003024453 A JP 2003024453A
- Authority
- JP
- Japan
- Prior art keywords
- tubular tissue
- reinforcing member
- shape
- main body
- tubular
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、身体の血管、食
道、胆管等の管状組織の補強を図るための管状組織補強
部材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular tissue reinforcing member for reinforcing tubular tissues such as blood vessels, esophagus and bile ducts of the body.
【０００２】[0002]
【従来の技術】管状組織の治療としては、例えば、動脈
瘤（動脈が局所的に拡張膨張し、紡錘状、円錐状を呈す
る疾患）など異常血管の治療がある。従来、この動脈瘤
の治療としては、直接患部を切開し、人工血管などを移
植する外科手術を施すか、血管内にステントを収容した
治療用管（カテーテル）を挿入し、経皮的にステントを
血管内に留置するか、または、金属製のクリップを動脈
瘤部位に局所的に挟み込んで、瘤を閉塞するといったこ
とが行われている。2. Description of the Related Art The treatment of tubular tissues includes, for example, treatment of abnormal blood vessels such as aneurysms (diseases in which arteries are locally dilated and expanded to have a spindle shape or a conical shape). Conventionally, for the treatment of this aneurysm, the affected area is directly incised and a surgical operation for transplanting an artificial blood vessel or the like is performed, or a therapeutic tube (catheter) containing a stent is inserted into the blood vessel, and the percutaneous stent is used. It has been practiced that the aneurysm is occluded by indwelling the aneurysm in a blood vessel or by locally sandwiching a metal clip at the aneurysm site.
【０００３】上記ステントは、公知のように円筒型の網
状部材で形成されており、例えば、血管などの管状組織
に挿入・留置されて、弱体化した動脈瘤のある区画を補
強するのに使用されている。また、このステントは、血
管以外の食道や胆管などの管状組織にも挿入・留置され
て、その留置した管状組織の部分の補強を行うと共に管
路を確保するために使用されている。As is well known, the above-mentioned stent is formed of a cylindrical net-like member, and is used, for example, by inserting and placing it in a tubular tissue such as a blood vessel to reinforce a section having a weakened aneurysm. Has been done. Further, this stent is also inserted and placed in a tubular tissue such as an esophagus or a bile duct other than a blood vessel to reinforce the portion of the placed tubular tissue and to secure a duct.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
ように人工血管を移植する治療は、人工心肺に接続して
心臓の脈動を止めた状態でバイパス手術を行わなければ
ならないため、術者及び患者に非常に負担がかかるとい
う問題がある。However, in the treatment for transplanting the artificial blood vessel as described above, the bypass operation must be performed in a state in which the heart pulsation is stopped by connecting to the artificial heart-lung, and therefore the operator and the patient are not affected. There is a problem that it is very burdensome.
【０００５】また、ステントを血管内に留置する治療
は、そのステントを血流の早い血管内に確実に留置させ
ることが非常に難しいという問題がある。特に、大動脈
においては血流が早く、また大きな脈動の作用下にある
ために、確実にステントを留置させておくことが極めて
困難である。[0005] Further, the treatment of placing the stent in the blood vessel has a problem that it is very difficult to surely place the stent in the blood vessel having fast blood flow. Particularly in the aorta, the blood flow is fast and it is under the action of a large pulsation, so that it is extremely difficult to reliably place the stent.
【０００６】また、クリップを用いる治療は、その構造
上、不定形な形状である動脈瘤のすべてに対しては適用
できないという問題がある。また、クリップで挟み込む
ときの力の調節が難しく、仮に過大な力により動脈瘤を
閉塞した場合は、組織の壊死などが生じる虞もある。[0006] Further, there is a problem that the treatment using a clip cannot be applied to all aneurysms having an irregular shape due to its structure. Further, it is difficult to adjust the force when sandwiched by the clip, and if the aneurysm is occluded by an excessive force, there is a possibility that tissue necrosis or the like occurs.
【０００７】また、一般的に動脈瘤のような異常部位
は、周囲の臓器と強い癒着が生じる傾向があるが、上記
従来の治療では、このような癒着を未然に防止すること
ができない。同様に、食道や胆管などの狭窄部の異常部
位においても、ステントを留置させることで、管路を確
保して補強を行うことはできるものの、外部の保護まで
は行うことができないために、前記異常部位に例えば癌
組織がある場合に、癌組織が他の臓器に転移することを
未然に防止することはできず、または異常部位が周囲の
組織と癒着することを防ぐことはできない。[0007] Generally, an abnormal site such as an aneurysm tends to cause strong adhesion with surrounding organs, but such conventional adhesion cannot prevent such adhesion in advance. Similarly, even in an abnormal site of a stenosis such as an esophagus or a bile duct, it is possible to secure a duct and reinforce it by indwelling a stent, but it is not possible to perform external protection. When the abnormal site has, for example, a cancer tissue, it is not possible to prevent the cancer tissue from metastasizing to another organ, or it is impossible to prevent the abnormal site from adhering to surrounding tissues.
【０００８】本発明は、かかる課題に鑑みなされたもの
で、その目的は、術者及び患者に多大な負担をかけるこ
となく、また、目的部位を正確に補強することができ、
癒着または転移防止を行うこともできる管状組織補強部
材を提供することである。The present invention has been made in view of the above problems, and an object thereof is to reinforce a target site accurately without imposing a great burden on an operator and a patient.
It is an object of the present invention to provide a tubular tissue reinforcing member that can also prevent adhesion or metastasis.
【０００９】[0009]
【課題を解決するための手段】前述した目的を達成する
ために、請求項１記載の発明は、身体の管状組織の補強
を行うための管状組織補強部材であって、易変形性を有
すると共に面を備えた本体を有し、本体は、その面が管
状組織の外周の少なくとも一部を覆うべく、管状組織の
外周で保持可能なもので構成されることを特徴とする。
動脈瘤のような異常がある管状組織の補強するべき部位
に対して、その外側から覆うようにして、補強部材を管
状組織の外周に保持させる。補強部材は、本体の易変形
性によって管状組織の外周に適合するような形状に変形
することができ、管状組織の外周に確実に保持させるこ
とができる。こうして、管状組織を外側から補強する。
管状組織自体を切断する必要はないために、患者及び術
者の負担を軽減することができる。さらには、補強部材
が管状組織の外側に保持されるために、管状組織内の例
えば血流、脈動の影響を大きく受けることはない。その
ために、補強部材を、管状組織の補強が必要な目的部位
に正確に取り付けることができる。また、一度取り付け
た後も、血流、脈動といった影響を受けることがないた
めに、その位置が大きく移動したりすることを防ぐこと
ができる。さらに、補強部材の保持された管状組織と他
の周囲の臓器との間を補強部材が隔離するために、管状
組織と他の周囲の組織との癒着または管状組織から周囲
の組織への癌組織の転移を未然に防ぐこともできる。In order to achieve the above-mentioned object, the invention according to claim 1 is a tubular tissue reinforcing member for reinforcing tubular tissue of a body, which is easily deformable. A body is provided with a surface, the body being configured to be held by the outer circumference of the tubular tissue so that the surface covers at least a portion of the outer circumference of the tubular tissue.
The reinforcing member is held on the outer periphery of the tubular tissue so as to cover the portion of the tubular tissue having an abnormality such as an aneurysm to be reinforced from the outside. The reinforcing member can be deformed into a shape that fits the outer circumference of the tubular tissue due to the deformability of the main body, and can be reliably held on the outer circumference of the tubular tissue. Thus, the tubular tissue is reinforced from the outside.
Since it is not necessary to cut the tubular tissue itself, the burden on the patient and the operator can be reduced. Furthermore, since the reinforcing member is held outside the tubular tissue, it is not significantly affected by, for example, blood flow or pulsation in the tubular tissue. Therefore, the reinforcing member can be accurately attached to the target site where the tubular tissue needs to be reinforced. Further, even after once attached, it is not affected by blood flow or pulsation, so that it is possible to prevent the position from largely moving. Further, because the reinforcing member separates the tubular tissue held by the reinforcing member from other surrounding organs, adhesion between the tubular tissue and other surrounding tissue or cancer tissue from the tubular tissue to the surrounding tissue. It is also possible to prevent the transfer of.
【００１０】請求項２記載の発明は、請求項１記載の本
体が、自然状態でとりうる形状の少なくとも１つが、本
体の前記面が該面に平行な仮想軸の回りに巻いた３次元
形状となった、自己形状保持性を有することを特徴とす
る。このように補強部材の本体が、巻いた３次元形状の
自己形状保持性を有することにより、管状組織の外周に
巻付くのに適したものとなり、管状組織の補強が必要な
目的部位に補強部材を確実に保持することができる。
尚、ここで、巻いた３次元形状とは、リード角が０度と
なった形状やリード角が０度以外の螺旋状に巻いた形状
のいずれをも含むものである。According to a second aspect of the present invention, in the main body according to the first aspect, at least one of the shapes that can be taken in a natural state is a three-dimensional shape in which the surface of the main body is wound around an imaginary axis parallel to the surface. It has a self-shape retention property. Since the main body of the reinforcing member has the self-shape-retaining property of the rolled three-dimensional shape, it is suitable for being wrapped around the outer periphery of the tubular tissue, and the reinforcing member is provided at the target site where the tubular tissue needs to be reinforced. Can be securely held.
Here, the rolled three-dimensional shape includes both a shape in which the lead angle is 0 degree and a shape in which the lead angle is spirally wound other than 0 degree.
【００１１】請求項３記載の発明は、請求項２記載の本
体が、他の形状から前記仮想軸の回りに巻いた３次元形
状へと遷移可能となっていることを特徴とする。これに
より、補強部材を管状組織の外周に取り付ける前までは
取り扱いやすい形状に、取り付けた後は、管状組織の外
周に巻付くのに適した形状とさせることができるように
なる。遷移のトリガは、任意とすることができるが、例
えば、応力付与または温度変化とすることができる。The invention according to claim 3 is characterized in that the main body according to claim 2 can be changed from another shape to a three-dimensional shape wound around the virtual axis. As a result, the reinforcing member can be made into a shape that is easy to handle before being attached to the outer periphery of the tubular tissue, and can have a shape suitable for being wrapped around the outer periphery of the tubular tissue after being attached. The trigger for the transition can be arbitrary, but can be, for example, stress application or temperature change.
【００１２】請求項４記載の発明は、請求項１記載の前
記本体が、他の形状から前記管状組織の外周で保持可能
な形状へと遷移可能となっていることを特徴とする。こ
れにより、補強部材を管状組織の外周に取り付ける前ま
では取り扱いやすい形状に、取り付けた後は、管状組織
の外周に保持させるのに適した形状とさせることができ
るようになる。遷移のトリガは、任意とすることができ
るが、例えば、応力付与または温度変化とすることがで
きる。また、請求項５記載の発明は、請求項３または４
記載の前記本体が形状記憶素材から形成されていること
を特徴とする。The invention according to claim 4 is characterized in that the main body according to claim 1 can be changed from another shape to a shape that can be held by the outer periphery of the tubular tissue. As a result, the reinforcing member can have a shape that is easy to handle before being attached to the outer periphery of the tubular tissue, and can have a shape that is suitable for holding the reinforcing member on the outer periphery of the tubular tissue after attachment. The trigger for the transition can be arbitrary, but can be, for example, stress application or temperature change. Further, the invention according to claim 5 is the invention according to claim 3 or 4.
The main body described is formed of a shape memory material.
【００１３】請求項６記載の発明は、請求項１ないし５
のいずれか１項に記載の本体が、テープ状をなしてお
り、前記面に平行な仮想軸の回りに螺旋状に巻付け可能
となっていることを特徴とする。補強部材のテープ状の
本体を螺旋状に巻付けることにより、その管状組織の外
周に補強部材を取り付けることができる。螺旋のピッチ
を調整することにより、補強するべき管状組織の様々な
軸長さに対応させることができるようになる。The invention according to claim 6 is defined by claims 1 to 5.
The main body according to any one of 1 to 4 is in the form of a tape, and can be spirally wound around an imaginary axis parallel to the surface. By spirally winding the tape-shaped main body of the reinforcing member, the reinforcing member can be attached to the outer circumference of the tubular tissue. Adjusting the pitch of the helix makes it possible to accommodate different axial lengths of the tubular tissue to be reinforced.
【００１４】請求項７記載の発明は、請求項１ないし６
のいずれか１項に記載の前記本体の両端部に、それぞれ
互いに係合可能となった係合部と被係合部が設けられる
ことを特徴とする。係合部と被係合部を互いに係合させ
て、本体を閉じた形状とすることにより、本体を管状組
織の外周により一層確実に保持することができるように
なる。The invention according to claim 7 is the invention according to claims 1 to 6.
The engaging portion and the engaged portion, which can be engaged with each other, are provided at both end portions of the main body described in any one of 1 to 3 above. By engaging the engaging portion and the engaged portion with each other to form the body in a closed shape, the body can be more reliably held by the outer periphery of the tubular tissue.
【００１５】[0015]
【発明の実施の形態】以下、図面を用いて本発明の実施
の形態を説明する。尚、以下の実施形態は本発明を限定
するものではない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The following embodiments do not limit the present invention.
【００１６】図１は、本発明の第１実施形態を表す図で
あり、この実施形態における補強部材１０は面を備えた
シート状の本体１２からなる。この本体１２は、線材を
パンタグラフ状、コイル状、折り曲げ状、網目状、格子
状またはそれ以外の任意の形状にしたものを適宜箇所で
線材同士を結着して、全体としてシート状に構成した易
変形性を有するものからなっている。または、図示した
ような線材で構成する他に、一枚の易変形性を持つシー
ト材で構成することも可能である。FIG. 1 is a view showing a first embodiment of the present invention, and a reinforcing member 10 in this embodiment comprises a sheet-like main body 12 having a surface. The main body 12 is formed of a pantograph-shaped, coil-shaped, bent-shaped, mesh-shaped, lattice-shaped or any other shape of wire rods by binding the wire rods at appropriate places to form a sheet as a whole. It is made of easily deformable material. Alternatively, in addition to the wire material as illustrated, it is also possible to use a single easily deformable sheet material.
【００１７】上記線材またはシート材の材質としては、
ステンレス鋼、タンタル、プラチナ、形状記憶合金（Ｎ
ｉ−Ｔｉ系、Ｃｕ−Ａｌ−Ｎｉ系、Ｃｕ−Ｚｎ−Ａｌ
系、Ｐｄ−Ｔｉ系、Ｂｅ−Ｃｕ系、アモルファス等）、
プラスチックまたはプラスチックモノフィラメント（ポ
リエステル、ポリウレタン、ポリオレフィン、ポリテト
ラフルオロエチレン、ポロシロキサン、形状記憶樹脂
等）等のいずれかまたはその組み合わせを選択すること
ができる。線材のみで本体１２を構成した場合には、な
るべくその線材の占有密度を高くして、本体１２が後述
の管状組織の外周を覆ったときに、本体１２から管状組
織に与える応力が均一になるようにするとよい。As the material of the wire or sheet material,
Stainless steel, tantalum, platinum, shape memory alloy (N
i-Ti system, Cu-Al-Ni system, Cu-Zn-Al
System, Pd-Ti system, Be-Cu system, amorphous, etc.),
Either plastic or plastic monofilament (polyester, polyurethane, polyolefin, polytetrafluoroethylene, polysiloxane, shape memory resin, etc.) or a combination thereof can be selected. When the main body 12 is composed of only the wire rod, the occupation density of the wire rod is increased as much as possible so that the stress applied from the main body 12 to the tubular tissue becomes uniform when the main body 12 covers the outer periphery of the tubular tissue described later. It is good to do so.
【００１８】または、本体１２を、線状で構成したもの
にカバーを付したものとすることもできる。カバーを付
することにより、応力の均一化を図ることができる。カ
バーの材質としては、ポリエステル、シリコン樹脂、ポ
リテトラフルオロエチレン、ポリオレフィン、ポリウレ
タン、ポリビニルピロリドン、ポリヒドロキエメチルメ
タクリレート等のいずれかまたはその組み合わせを選択
することができ、ディッピングまたはキャスティング法
等により線状材にコートする。Alternatively, the main body 12 may be a linear body with a cover. By attaching the cover, the stress can be made uniform. As the material of the cover, any one of polyester, silicone resin, polytetrafluoroethylene, polyolefin, polyurethane, polyvinylpyrrolidone, polyhydroxymethylmethacrylate, etc. or a combination thereof can be selected, and a linear shape can be obtained by a dipping or casting method. Coat the material.
【００１９】シート状の本体１２は、自然状態におい
て、図１に示したように、シート状の本体１２の面に平
行な仮想軸Ａの回りで巻いた（即ち、丸まった）３次元
形状となる自己形状保持性を有している。この本体１２
は、図１に示した以外にも、自然状態において、２次元
の平面的な形状を取り得るようにすることもでき、その
場合に、所定の応力の付与により、図１に示す形状と平
面的な形状との間の２つの形状の間を遷移することがで
きるようになっていてもよい。または、本体１２を形状
記憶素材で作製した場合に、温度の変化によって、図１
に示した３次元の形状と、２次元の形状との間を遷移す
ることができるようになっていてもよい。そして、補強
部材１０を管状組織に取り付ける前は取り扱いの便利な
２次元の形状となっており、補強部材１０を管状組織に
取り付けた後は、管状組織に保持されるのに適した図１
に示したような３次元形状となるように設定されるとよ
い。In the natural state, the sheet-shaped main body 12 has a three-dimensional shape wound (that is, rolled) around an imaginary axis A parallel to the surface of the sheet-shaped main body 12 as shown in FIG. It has the following self-shape retention property. This body 12
In addition to those shown in FIG. 1, it is also possible to adopt a two-dimensional planar shape in a natural state. In that case, by applying a predetermined stress, the shape and the plane shown in FIG. It may be possible to make a transition between two shapes between the two shapes. Alternatively, when the body 12 is made of a shape memory material, the temperature of
It may be possible to make a transition between the three-dimensional shape shown in 1 and the two-dimensional shape. And, before attaching the reinforcing member 10 to the tubular tissue, it has a convenient two-dimensional shape, and after attaching the reinforcing member 10 to the tubular tissue, it is suitable for being held by the tubular tissue.
It may be set to have a three-dimensional shape as shown in FIG.
【００２０】尚、図１の巻いた状態において、シート状
の本体１２の両端部はオーバラップしているが、オーバ
ラップせずに、両者の間に隙間ができるように、即ち、
横断面で補強部材を見たときにその横断面形状がＣ字状
形状をなしていてもよい。In the wound state of FIG. 1, both ends of the sheet-like main body 12 overlap each other, but there is a gap between them without overlapping, that is,
When the reinforcing member is viewed in the cross section, the cross section may have a C-shape.
【００２１】この補強部材１０を用いて管状組織の補強
を行うには、図２に示すように、動脈瘤のような異常が
ある管状組織Ｔの補強するべき部位の外側から覆うよう
にして、補強部材１０の本体１２を管状組織Ｔの外周に
保持させる。このとき、補強部材１０の本体１２は、そ
の易変形性により、管状組織Ｔの外周に適合するように
変形すると共に、図１に示す本体１２の自己形状保持性
によって管状組織Ｔに巻付く。このため、補強部材１０
が管状組織Ｔの外周から簡単に外れることはない。図２
は、複数の動脈瘤が血管である管状組織Ｔに形成されて
おり、動脈瘤が形成されているそれぞれの部位に補強部
材１０をそれぞれ取り付けた例である。また、図３は、
大動脈の分岐部位に形成された動脈瘤に対して各分岐部
位に補強部材１０を取り付けることにより、動脈瘤の形
成された分岐部位を補強した例である。各分岐部位に取
り付けられた２つの補強部材１０は互いに糸などによっ
て連結されるとよい。In order to reinforce the tubular tissue using this reinforcing member 10, as shown in FIG. 2, the tubular tissue T having an abnormality such as an aneurysm is covered from the outside of the region to be reinforced, The body 12 of the reinforcing member 10 is held on the outer periphery of the tubular tissue T. At this time, the main body 12 of the reinforcing member 10 is deformed so as to fit the outer periphery of the tubular tissue T due to its easy deformability, and is wrapped around the tubular tissue T by the self-shape maintaining property of the main body 12 shown in FIG. Therefore, the reinforcing member 10
Does not easily come off the outer circumference of the tubular tissue T. Figure 2
In the example, a plurality of aneurysms are formed in the tubular tissue T that is a blood vessel, and the reinforcing members 10 are attached to the respective sites where the aneurysms are formed. In addition, FIG.
This is an example of reinforcing the branch site where the aneurysm is formed by attaching the reinforcing member 10 to each branch site for the aneurysm formed at the branch site of the aorta. The two reinforcing members 10 attached to each branching part may be connected to each other by a thread or the like.
【００２２】各動脈瘤の大きさに適合するように、その
長さ及び内径が適した寸法で形成された補強部材１０を
使用することにより、各補強するべき目的部位に確実に
補強部材１０を保持させることができる。By using the reinforcing member 10 whose length and inner diameter are appropriately dimensioned so as to match the size of each aneurysm, the reinforcing member 10 is surely attached to each target site to be reinforced. Can be held.
【００２３】この実施形態の補強部材を使用する際に
は、管状組織の外側に補強部材１０を取り付けるため
に、開腹手術を行う必要はあるが、管状組織自体を切断
する必要はないので、患者及び術者に与える負担を大幅
に軽減することができる。また、この補強部材１０を内
視鏡手術用の外科用器具に装填して、該外科用器具をカ
テーテルに通して体内に挿入し、外科用器具の操作によ
り、補強部材１０を管状組織の外側に取り付けるように
すれば、内視鏡手術で補強部材１０の取り付けを行うこ
とができるので、患者及び術者に与える負担をより一層
軽減することができる。When using the reinforcing member of this embodiment, it is necessary to perform a laparotomy in order to attach the reinforcing member 10 to the outside of the tubular tissue, but it is not necessary to cut the tubular tissue itself. Also, the burden on the operator can be greatly reduced. Further, the reinforcing member 10 is loaded into a surgical instrument for endoscopic surgery, the surgical instrument is inserted into the body through a catheter, and the surgical instrument is operated to move the reinforcing member 10 to the outside of the tubular tissue. If the reinforcing member 10 is attached to the patient, the reinforcing member 10 can be attached by endoscopic surgery, so that the burden on the patient and the operator can be further reduced.
【００２４】このようにして、管状組織は、その外周に
覆われた補強部材１０によって強化される。さらに、補
強部材１０がその異常組織と周囲の臓器等の組織との間
を隔離するために、異常組織と周囲の臓器等の組織との
癒着または異常組織から周囲の組織への癌組織の転移を
防ぐことができる。In this way, the tubular tissue is reinforced by the reinforcing member 10 covered on the outer periphery thereof. Further, since the reinforcing member 10 separates the abnormal tissue from the tissues such as the surrounding organs, adhesion between the abnormal tissue and the tissues such as the surrounding organs or the transfer of the cancer tissue from the abnormal tissues to the surrounding tissues. Can be prevented.
【００２５】また、従来のステントと異なり、この補強
部材１０は、血管のような管状組織の外側に保持される
ため、血流・脈動の影響をほとんど受けず、そのため、
安定的に且つ正確に補強部材１０を管状組織の外周に取
り付けることができる。そして、図１に示すような補強
部材１０自体の自己形状保持力及び補強部材１０と管状
組織との間の摩擦力または係合力によってのみで、補強
部材１０を管状組織の外周に保持させることができる。Further, unlike the conventional stent, since the reinforcing member 10 is held outside the tubular tissue such as a blood vessel, it is hardly affected by blood flow and pulsation, and therefore,
The reinforcing member 10 can be stably and accurately attached to the outer circumference of the tubular tissue. Then, the reinforcing member 10 can be held on the outer periphery of the tubular tissue only by the self-shape retention force of the reinforcing member 10 itself as shown in FIG. 1 and the frictional force or the engaging force between the reinforcing member 10 and the tubular tissue. it can.
【００２６】または、その保持力を一層高めるために、
補強部材に係合手段を設けることができる。図４は係合
手段を備えた補強部材の第２の実施形態を表す斜視図で
あり、図５は図４の横断面図である。この補強部材１
０’は、本体１２’の両端部に係合部１２ａ及び被係合
部１２ｂが設けられている。係合部１２ａ及び被係合部
１２ｂとしては、任意の構成をとることができるが、例
えば本体１２’に一体成形または任意の手段により固着
させた面ファスナから構成することができる。面ファス
ナは、プラスチックからなり、キノコ状またはループ状
の係合子をそれぞれ備える公知の構成を採用することが
できる。または、図示した以外に、線状ファスナを用い
ることも可能である。Alternatively, in order to further increase the holding power,
Engaging means may be provided on the reinforcing member. FIG. 4 is a perspective view showing a second embodiment of a reinforcing member provided with engaging means, and FIG. 5 is a transverse sectional view of FIG. This reinforcing member 1
In 0 ', the engaging portion 12a and the engaged portion 12b are provided at both ends of the main body 12'. The engaging portion 12a and the engaged portion 12b may have any configuration, but may be, for example, a surface fastener integrally molded with the main body 12 'or fixed thereto by any means. The hook-and-loop fastener is made of plastic, and can adopt a known configuration including mushroom-shaped or loop-shaped engaging elements, respectively. Alternatively, linear fasteners other than those shown may be used.
【００２７】この第２の実施形態の補強部材１０’を使
用する場合には、補強するべき管状組織に補強部材１
０’を巻付けた後、係合部１２ａと被係合部１２ｂとを
係合することにより、補強部材１０’を閉じた形状とし
て管状組織の外周を完全に包囲して、より確実に管状組
織の外周に補強部材１０’を保持させることができる。
また、この第２実施形態では、係合手段を設けているた
めに、図１に示すような自己形状保持性を持たない本体
１２からなる補強部材１０’とすることも可能である。When the reinforcing member 10 'of the second embodiment is used, the reinforcing member 1 is attached to the tubular tissue to be reinforced.
After winding 0 ′, the engaging portion 12a and the engaged portion 12b are engaged with each other to completely enclose the outer periphery of the tubular tissue so that the reinforcing member 10 ′ has a closed shape, and thus the tubular tissue can be more reliably tubular. The reinforcing member 10 'can be held on the outer periphery of the tissue.
Further, in this second embodiment, since the engaging means is provided, it is also possible to use the reinforcing member 10 'composed of the main body 12 having no self-shape retaining property as shown in FIG.
【００２８】次に、図６は補強部材の第３の実施形態を
表す斜視図である。この実施形態における補強部材１
０”は、面を備えたテープ状の本体１２”からなってい
る。本体１２”は、本体１２と同様に形成することがで
きる。また、テープ状の本体１２”は、自然状態におい
て、図６に示したように、テープ状の面に平行なある仮
想軸Ａの回りで螺旋状に巻いた（即ち、丸まった）３次
元形状となる自己形状保持性を有している。この本体１
２”は、図６に示した以外にも、自然状態において、２
次元の平面的な形状を取り得るようにすることもでき、
その場合に、所定の応力の付与により、図６に示す形状
と平面的な形状との間の２つの形状の間を遷移すること
ができるようになっていてもよい。または、本体１２”
を形状記憶素材で作製した場合に、温度の変化によっ
て、図６に示した３次元の形状と、２次元の形状との間
を遷移することができるようになっていてもよい。そし
て、補強部材１０”を管状組織に取り付ける前は取り扱
いの便利な２次元の形状となっており、補強部材１０”
を管状組織に取り付けた後は、管状組織に保持されるの
に適した図６に示したような３次元形状となるように設
定されるとよい。Next, FIG. 6 is a perspective view showing a third embodiment of the reinforcing member. Reinforcing member 1 in this embodiment
0 "consists of a tape-shaped body 12" with a face. The main body 12 ″ can be formed in the same manner as the main body 12. Further, the tape-shaped main body 12 ″ is, in its natural state, as shown in FIG. It has a self-shape-retaining property of being a three-dimensional shape that is spirally wound around (that is, rolled). This body 1
2 "is 2 in the natural state other than that shown in FIG.
It is also possible to take a plane shape of dimension,
In that case, by applying a predetermined stress, it may be possible to transition between the two shapes of the shape shown in FIG. 6 and the planar shape. Or body 12 "
When is manufactured from a shape memory material, it may be possible to make a transition between the three-dimensional shape shown in FIG. 6 and the two-dimensional shape by changing the temperature. Before attaching the reinforcing member 10 ″ to the tubular tissue, the reinforcing member 10 ″ has a two-dimensional shape that is convenient for handling.
After being attached to the tubular tissue, it may be set to have a three-dimensional shape as shown in FIG. 6, which is suitable for being held in the tubular tissue.
【００２９】この補強部材１０”を用いて管状組織の補
強を行うには、図７に示すように、動脈瘤のような異常
がある管状組織の補強するべき部位の外側から覆うよう
にして、補強部材１０”を管状組織の外周に保持させ
る。このとき、補強部材１０”の本体１２”は、その易
変形性により、管状組織Ｔの外周に適合するように変形
すると共に、図６に示す本体１２”の自己形状保持性に
よって管状組織Ｔに螺旋状に巻付く。このため、補強部
材１０が管状組織Ｔの外周から簡単に外れることはな
い。また、螺旋状に巻付ける螺旋のピッチを適宜調整す
ることにより、同じ寸法の補強部材１０”を用いて、補
強するべき管状組織Ｔの様々な軸長さに対応させること
もできる。In order to reinforce the tubular tissue using this reinforcing member 10 ", as shown in FIG. 7, the tubular tissue having an abnormality such as an aneurysm is covered from the outside to be reinforced, The stiffening member 10 "is held on the outer circumference of the tubular tissue. At this time, the main body 12 ″ of the reinforcing member 10 ″ is deformed so as to fit the outer periphery of the tubular tissue T due to its easy deformability, and the main body 12 ″ of the reinforcing member 10 ″ is transformed into the tubular tissue T by the self-shape retention of the main body 12 ″ shown in FIG. Since the reinforcing member 10 is wound in a spiral shape, the reinforcing member 10 does not easily come off from the outer circumference of the tubular tissue T. Further, by appropriately adjusting the pitch of the spiral wound in the spiral shape, the reinforcing member 10 ″ having the same size. Can also be used to accommodate various axial lengths of tubular tissue T to be reinforced.
【００３０】以上の各実施形態では、自然状態におい
て、管状組織に巻付くのに適するような３次元の自己形
状保持性を有するものとしたが、その代わりに、管状組
織に巻付ける際に補強部材に塑性変形をさせることによ
り、補強部材の巻付き状態を維持するようなものとする
こともできる。また、図６の変形例として、図示は省略
するが、自己形状保持性を持たせる代わりに、または自
己形状保持性を持たせると共に、テープ状の本体１２”
の両端部に本体１２”の一般部と係合可能となった係合
部を設けることも可能である。例えば、係合部に突起を
設けて、該突起を、本体１２”の一般部を構成する線材
によって形成された開口に挿入することにより端部を一
般部に係合して、よって、螺旋状の巻付きが外れるのを
防ぐことができる。こうして、補強するべき部位からの
補強部材１０”の脱落を防止することができる。In each of the above embodiments, the three-dimensional self-shape-retaining property suitable for wrapping around the tubular tissue is set in the natural state, but instead, the three-dimensional shape is reinforced when wrapped around the tubular tissue. It is also possible to maintain the winding state of the reinforcing member by plastically deforming the member. Further, as a modification of FIG. 6, although not shown, the tape-shaped main body 12 ″ is used instead of or in addition to the self-shape-retaining property.
It is also possible to provide an engaging portion capable of engaging with the general portion of the main body 12 ″ at both ends of the main body 12 ″. For example, a protrusion is provided on the engaging portion and the general portion of the main body 12 ″ is provided with the projection. By inserting into the opening formed by the constituent wire rods, the end portion can be engaged with the general portion, thus preventing the spiral winding from being disengaged. In this way, it is possible to prevent the reinforcing member 10 ″ from falling off the portion to be reinforced.
【００３１】さらに、以上の各実施形態では、補強部材
を専ら管状組織自体に固定して位置決めする場合につい
て説明したが、これに限るものではなく、管状組織に取
り付けた補強部材１０（１０’，１０”）と周囲の臓器
との間を糸などで連結することにより、その位置決めを
行うようにして、補強部材１０（１０’，１０”）を管
状組織の外周に一層確実に保持させることもできる。Furthermore, in each of the above-mentioned embodiments, the case where the reinforcing member is exclusively fixed and positioned on the tubular tissue itself has been described, but the present invention is not limited to this, and the reinforcing member 10 (10 ', 10', attached to the tubular tissue is not limited to this. 10 ") and the surrounding organs are connected by a thread or the like so that the positioning can be performed so that the reinforcing member 10 (10 ', 10") can be held more securely on the outer periphery of the tubular tissue. it can.
【００３２】さらに、以上の各実施形態では、血管の動
脈瘤の異常部位の外周に補強部材を保持する例について
説明したが、これに限るものではなく、食道や胆管など
の狭窄部の異常部位の外周に同様に補強部材を保持する
こともできる。Further, in each of the above embodiments, an example in which a reinforcing member is held on the outer periphery of an abnormal site of an aneurysm of a blood vessel has been described, but the present invention is not limited to this, and an abnormal site of a stricture such as an esophagus or a bile duct. Similarly, a reinforcing member may be held on the outer circumference of the.
【００３３】[0033]
【発明の効果】以上説明したように本発明の管状組織補
強部材によれば、管状組織を外側から補強するのに適し
たものであるために、管状組織自体を切断する必要はな
く、患者及び術者の負担を軽減することができる。さら
には、補強部材が管状組織の外側に保持されるために、
管状組織内の例えば血流、脈動の影響を大きく受けるこ
とはない。そのために、補強部材を、管状組織の補強が
必要な部位に正確に取り付けることができる。また、一
度取り付けた後も、血流、脈動といった影響を受けるこ
とがないために、補強部材が大きく移動することを防ぐ
ことができる。さらに、補強部材の保持された管状組織
と他の周囲の臓器との間を補強部材が隔離するために、
管状組織と他の周囲の組織との癒着または管状組織から
周囲の組織への癌組織の転移を未然に防ぐこともでき
る。As described above, according to the tubular tissue reinforcing member of the present invention, since it is suitable to reinforce the tubular tissue from the outside, it is not necessary to cut the tubular tissue itself, and the patient and The burden on the operator can be reduced. Furthermore, since the reinforcing member is held outside the tubular tissue,
It is not significantly affected by, for example, blood flow or pulsation in the tubular tissue. Therefore, the reinforcing member can be accurately attached to the site where the tubular tissue needs to be reinforced. In addition, since the reinforcing member is not affected by blood flow or pulsation even after once attached, it is possible to prevent the reinforcing member from moving largely. Furthermore, because of the isolation of the reinforcing member between the retained tubular tissue of the reinforcing member and other surrounding organs,
Adhesion of tubular tissue to other surrounding tissue or metastasis of cancerous tissue from tubular tissue to surrounding tissue can be prevented in advance.
【図１】本発明の補強部材の第１実施形態を表す斜視図
である。FIG. 1 is a perspective view showing a first embodiment of a reinforcing member of the present invention.
【図２】図１の補強部材が管状組織の外周に保持された
状態の一例を表す図である。FIG. 2 is a diagram showing an example of a state in which the reinforcing member of FIG. 1 is held on the outer periphery of tubular tissue.
【図３】図１の補強部材が管状組織の外周に保持された
状態の他の例を表す図である。FIG. 3 is a diagram showing another example of a state in which the reinforcing member of FIG. 1 is held on the outer periphery of tubular tissue.
【図４】本発明の補強部材の第２実施形態を表す斜視図
である。FIG. 4 is a perspective view showing a second embodiment of the reinforcing member of the present invention.
【図５】図４の５−５線に沿って見た断面図である。5 is a sectional view taken along line 5-5 of FIG.
【図６】本発明の補強部材の第３実施形態を表す斜視図
である。FIG. 6 is a perspective view showing a third embodiment of the reinforcing member of the present invention.
【図７】図６の補強部材が管状組織の外周に保持された
状態の一例を表す図である。FIG. 7 is a diagram showing an example of a state in which the reinforcing member of FIG. 6 is held on the outer periphery of tubular tissue.
１０、１０’、１０” 補強部材 １２、１２’、１２” 本体 １２ａ 係合部 １２ｂ 被係合部 Ｔ 管状組織 Ａ 仮想軸 10, 10 ', 10 "reinforcing member 12, 12 ', 12 "body 12a engaging part 12b Engagement part T tubular tissue A virtual axis
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4C097 AA14 BB01 CC04 DD01 DD09 EE02 EE06 EE08 EE09 EE13 4C167 AA44 AA45 AA48 AA53 BB05 BB11 CC08 CC10 DD08 GG32 HH04 ─────────────────────────────────────────────────── ─── Continued front page F term (reference) 4C097 AA14 BB01 CC04 DD01 DD09 EE02 EE06 EE08 EE09 EE13 4C167 AA44 AA45 AA48 AA53 BB05 BB11 CC08 CC10 DD08 GG32 HH04
Claims (7)
組織補強部材であって、 易変形性を有すると共に面を備えた本体を有し、本体
は、その面が管状組織の外周の少なくとも一部を覆うべ
く、管状組織の外周で保持可能なもので構成されること
を特徴とする管状組織補強部材。1. A tubular tissue reinforcing member for reinforcing tubular tissue of a body, comprising a main body having a surface that is easily deformable and has a surface, and the main body has at least the surface of the outer periphery of the tubular tissue. A tubular tissue reinforcing member, which is configured to be capable of being held by the outer periphery of tubular tissue so as to cover a part thereof.
少なくとも１つが、本体の前記面が該面に平行な仮想軸
の回りに巻いた３次元の形状となった、自己形状保持性
を有することを特徴とする請求項１記載の管状組織補強
部材。2. The body has a self-shape-retaining property, wherein at least one of the shapes that the body can assume in a natural state is a three-dimensional shape in which the surface of the body is wound around an imaginary axis parallel to the surface. The tubular tissue reinforcing member according to claim 1, which has.
回りに巻いた３次元形状へと遷移可能となっていること
を特徴とする請求項２記載の管状組織補強部材。3. The tubular tissue reinforcing member according to claim 2, wherein the main body is capable of transitioning from another shape to a three-dimensional shape wound around the virtual axis.
の外周で保持可能な形状へと遷移可能となっていること
を特徴とする請求項１記載の管状組織補強部材。4. The tubular tissue reinforcing member according to claim 1, wherein the main body is capable of transitioning from another shape to a shape capable of being held by the outer periphery of the tubular tissue.
ることを特徴とする請求項３または４記載の管状組織補
強部材。5. The tubular tissue reinforcing member according to claim 3, wherein the main body is formed of a shape memory element.
記面に平行な仮想軸の回りに螺旋状に巻付け可能となっ
ていることを特徴とする請求項１ないし５のいずれか１
項に記載の管状組織補強部材。6. The body according to claim 1, wherein the body has a tape shape and can be spirally wound around an imaginary axis parallel to the surface.
The tubular tissue reinforcing member according to the item.
係合可能となった係合部と被係合部が設けられることを
特徴とする請求項１ないし６のいずれか１項に記載の管
状組織補強部材。7. The end portion of the main body is provided with an engaging portion and an engaged portion that are engageable with each other, respectively. Tubular tissue reinforcing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001216712A JP2003024453A (en) | 2001-07-17 | 2001-07-17 | Tubular tissue reinforcing member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001216712A JP2003024453A (en) | 2001-07-17 | 2001-07-17 | Tubular tissue reinforcing member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003024453A true JP2003024453A (en) | 2003-01-28 |
Family
ID=19051153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001216712A Pending JP2003024453A (en) | 2001-07-17 | 2001-07-17 | Tubular tissue reinforcing member |
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| Country | Link |
|---|---|
| JP (1) | JP2003024453A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012509703A (en) * | 2008-11-24 | 2012-04-26 | ヴァスキュラー グラフト ソリューションズ リミテッド | External stent |
| US10052218B2 (en) | 2011-04-18 | 2018-08-21 | Vascular Graft Solutions Ltd. | Devices and methods for deploying implantable sleeves over blood vessels |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2127903A (en) * | 1936-05-05 | 1938-08-23 | Davis & Geck Inc | Tube for surgical purposes and method of preparing and using the same |
| US3726279A (en) * | 1970-10-08 | 1973-04-10 | Carolina Medical Electronics I | Hemostatic vascular cuff |
| EP0558352A1 (en) * | 1992-02-28 | 1993-09-01 | Shadyside Hospital | Apparatus for connecting and closing severed blood vessels |
| JP2000005321A (en) * | 1998-06-24 | 2000-01-11 | Atsusato Kitamura | Stent |
| JP2001029351A (en) * | 1999-07-16 | 2001-02-06 | Tokin Corp | Blood vessel anastomosis assisting implement |
-
2001
- 2001-07-17 JP JP2001216712A patent/JP2003024453A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2127903A (en) * | 1936-05-05 | 1938-08-23 | Davis & Geck Inc | Tube for surgical purposes and method of preparing and using the same |
| US3726279A (en) * | 1970-10-08 | 1973-04-10 | Carolina Medical Electronics I | Hemostatic vascular cuff |
| EP0558352A1 (en) * | 1992-02-28 | 1993-09-01 | Shadyside Hospital | Apparatus for connecting and closing severed blood vessels |
| JP2000005321A (en) * | 1998-06-24 | 2000-01-11 | Atsusato Kitamura | Stent |
| JP2001029351A (en) * | 1999-07-16 | 2001-02-06 | Tokin Corp | Blood vessel anastomosis assisting implement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012509703A (en) * | 2008-11-24 | 2012-04-26 | ヴァスキュラー グラフト ソリューションズ リミテッド | External stent |
| US9949852B2 (en) | 2008-11-24 | 2018-04-24 | Vascular Graft Solutions Ltd. | Implant for supporting bodily conduits such as blood vessels or/and grafted vessels |
| US10052218B2 (en) | 2011-04-18 | 2018-08-21 | Vascular Graft Solutions Ltd. | Devices and methods for deploying implantable sleeves over blood vessels |
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