【０００１】[0001]
【産業上の利用分野】本発明は静脈内の血栓を捕捉し、
塞栓症を処理または防止するフィルターに関する。BACKGROUND OF THE INVENTION The present invention captures a blood clot in a vein,
It relates to a filter for treating or preventing embolism.
【０００２】[0002]
【従来の技術】近年、肺塞栓症は虚血性心疾患や脳血管
障害と同様に、救急疾患として多くみられるようになっ
た。このような肺塞栓症となる静脈血栓の原因として
は、血流うっ滞、静脈内膜損復及び凝固系異常が挙げら
れ、これらに対する救急ないし予防的処置としては抗凝
固療法、血栓融解療法、血栓摘除術、下大静脈遮断術が
行われる。これらのうち、下大動脈遮断術を行う場合に
は、全身麻酔下に開腹を行い、下大静脈を結紮、縫縮ま
たはクリップで挟む方法と、局所麻酔下に経静脈性に種
々の血栓用フィルターを挿入する方法がある。しかしな
がら、前者の方法は、全身麻酔が必要なこと、手術前の
抗凝固療法の中止によって起こる血栓の形成が起こりや
すい等の理由で、最近では局所麻酔で行える経皮的フィ
ルター挿入法が行われることが多くなった。一般に使用
されるフィルターは放射状に拡張される複数の柔軟性の
ある枝状のものからなる小さい傘の形をしている。収縮
状態では、枝状のものは相互にほぼ平行に伸びていてこ
の状態で静脈に挿入される。いったん静脈の内側に入れ
られると枝状のものは自動的に外側に広がり、フィルタ
ーを静脈の壁に固定することができる。そして、そのフ
ィルターは患者の肺塞栓症の恐れがなくなるまで無制限
に放置される。しかしながら、フィルターを留置する際
に確実に固定するために支柱の下端にフックを有するの
で、フィルター留置後、時間がたつと（約２〜３週間）
このフィルターの周囲に新生内膜が発達して覆ってしま
う。そのため、静脈の血流を阻害とする共に、役目を終
えて取り出したいときに取り出せないという問題があっ
た。また、このようなディバイスを用いる患者は、当然
血栓準備状態が非常に進行していると考えなくてはなら
ない。つまり、患者の脈管内に金属性異物を留置するこ
とは、フィルターに対する異物反応として新しい血栓が
生成する恐れもある。このようなことの予防として、フ
ィルター挿入後の患者は生命維持のために抗凝血性薬物
治療を受け続ける必要がある。2. Description of the Related Art In recent years, pulmonary embolism has become common as an emergency disease like ischemic heart disease and cerebrovascular disorder. Examples of the cause of venous thrombosis that causes such pulmonary embolism include blood flow stasis, venous intimal damage and coagulation system abnormality, and as emergency or preventive measures against these, anticoagulant therapy, thrombolytic therapy, Thrombectomy and inferior vena cava blockage are performed. Among these, when performing inferior aortic blockade, laparotomy is performed under general anesthesia, and the inferior vena cava is ligated, sutured or clipped, and various thrombus filters are intravenously administered under local anesthesia. There is a way to insert. However, in the former method, a percutaneous filter insertion method that can be performed with local anesthesia is recently performed because of the need for general anesthesia, the formation of blood clots caused by discontinuation of anticoagulant therapy before surgery, etc. I have a lot of things. Commonly used filters are in the form of small umbrellas consisting of a plurality of flexible branches that are radially expanded. In the contracted state, the branches extend almost parallel to each other and are inserted into the vein in this state. Once inside the vein, the branches automatically expand outwards, allowing the filter to be anchored to the wall of the vein. The filter is then left indefinitely until the patient is no longer at risk of pulmonary embolism. However, since there is a hook at the lower end of the column to securely fix the filter when it is placed, it may take some time (about 2-3 weeks) after the filter is placed.
A neointima develops and covers the periphery of this filter. Therefore, there is a problem that the blood flow in the vein is obstructed, and it cannot be taken out when the user wants to take it out after completing the role. In addition, patients using such devices must naturally think that their thrombus preparation state is extremely advanced. In other words, indwelling a metallic foreign substance in a patient's vessel may generate a new thrombus as a foreign substance reaction to the filter. To prevent this, patients after filter insertion should continue to receive anticoagulant drug therapy for life support.
【０００３】[0003]
【発明が解決しようとする課題】以上の理由により、本
発明の目的は、前述のタイプの欠点を克服した新しい装
置を提案することである。即ち、手術時等で血栓生成し
やすい状態になっている場合、経皮的フィルター挿入法
で簡単に操作でき、取り出し困難な永久留置タイプでな
く、術後等の必要期間のみ一時的に留置可能で十分な血
栓捕捉作用を持った装置を提供することである。For the above reasons, the object of the present invention is to propose a new device which overcomes the drawbacks of the type described above. In other words, if the blood clot is easily generated during surgery, it can be easily operated by the percutaneous filter insertion method, and it is not a permanent indwelling type that is difficult to remove, but can be temporarily placed only for the necessary period such as after surgery. Is to provide a device having a sufficient thrombus-capturing action.
【０００４】[0004]
【課題を解決するための手段】本発明は以上のような目
的を達成するため、次のような血栓捕捉用フィルターを
提供するものである。すなわち、伸縮性のある金属線で
菱形状に形成した伸縮自在な複数の葉体から構成される
フィルターであって、チューブシャフト先端に接合され
た金属筒の円周溝に上記各葉体の片端を配列固着させて
ロート型の捕捉空間を形成した血栓捕捉用フィルターで
ある。In order to achieve the above objects, the present invention provides the following thrombus capturing filter. That is, a filter composed of a plurality of expandable and contractible leaf bodies formed in a rhombus shape with a stretchable metal wire, wherein one end of each leaf body is fitted in a circumferential groove of a metal cylinder joined to the tip of a tube shaft. Is a filter for catching thrombus in which a funnel-shaped trapping space is formed by fixing and fixing the above.
【０００５】[0005]
【作用】本発明では、伸縮性のある金属線で菱形状に形
成した複数のフィルター（葉体）により血栓を捕捉す
る。そしてフィルターの片端に内腔のあるチューブシャ
フトを接合することにより、このフィルターディバイス
を経皮的に回収する。つまり、フィルターが捕捉した血
栓を回収する。また、チューブシャフトの内腔に吸引カ
テーテルを通して吸引すれば、血栓をフィルターに誘導
捕捉させることができる。更に、チューブシャフトの内
腔に細径カテーテルを挿入し造影剤を注入または直接注
入すれば、回収した血栓の量、状態などをＸ線透視下に
おいて確認できる。つまり、本発明を用いれば血栓の回
収、さらには捕捉した血栓の状況把握も可能となる。In the present invention, a thrombus is captured by a plurality of filters (leaf bodies) formed in a rhombus shape with a stretchable metal wire. Then, the filter device is percutaneously collected by joining a tube shaft having a lumen to one end of the filter. That is, the thrombus captured by the filter is collected. If a suction catheter is sucked through the lumen of the tube shaft, the thrombus can be guided and captured by the filter. Furthermore, by inserting a thin catheter into the lumen of the tube shaft and injecting or directly injecting a contrast agent, the amount and state of the collected thrombus can be confirmed under fluoroscopy. That is, by using the present invention, it is possible to collect thrombus and to grasp the status of the captured thrombus.
【０００６】[0006]
【実施例】本発明の実施例について図面に基づいて説明
する。図１は３つの葉体から構成され、ロート型の捕捉
空間を形成するタイプの血栓捕捉用フィルターの正面
図、図２はその金属筒部分の断面図である。また、図１
７は逆止弁、ルーアコネクターを含めた装置全体の正面
図を示している。造影剤や細径カテーテルは逆止弁１６
から、シリンジ等はルーアコネクター１５から導入す
る。本発明の血栓捕捉用フィルター図１に示すように葉
体１、金属筒２、チューブシャフト３から構成されてい
る。葉体１は微細で伸縮自在な金属線を菱形状に成形し
たものであり、その材質は特に限定されるものではない
が、ステンレススチール、白金、ビアノ線、形状記憶合
金線、超弾性金属線等を用いるのが好適である。葉体１
の大きさは、血管等の適用場所により任意に変えること
ができるもので、特に大きさを限定するものではない。
３つの葉体１の片端は、チューブシャフト３先端に接合
された金属筒２の円周溝４に配列固着されており、これ
らの葉体１によって血栓捕捉空間が形成される。そして
隣接する葉体が相互に一部分重なり合うように葉体を配
列固着させれば、より血栓を逃しにくい捕捉空間を形成
することができる。金属筒２は軽量の金属製であり、チ
ューブシャフト３と葉体１の接続具である。金属筒２に
は図２で示すように、葉体１が円周溝４上に等間隔で植
立され、固着されている。また、後述するように金属筒
２に外円周溝と内円周溝の２つの円周溝を設け、葉体１
を二重に配列することもできる。そして金属筒２の中心
部は、チューブシャフト３の内腔５の出口となってい
る。チューブシャフト３は金属線を螺旋状に密に巻きこ
んだものであり、スプリングのように大きな弾力性を持
つ。チューブシャフト３には内腔５が通っており、この
内腔５から捕捉した血栓を回収する。そしてこの内腔５
は吸引カテーテルやＸ線造影剤の通路となっている。チ
ューブシャフト３やその内腔５の大きさは、血管等の適
用場所により任意に変えることができるもので、特に大
きさを限定するものではない。An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a thrombus-capturing filter which is composed of three leaves and forms a funnel-shaped trapping space, and FIG. 2 is a cross-sectional view of a metal cylinder portion thereof. Also, FIG.
7 shows a front view of the entire apparatus including the check valve and luer connector. Check valve 16 for contrast media and small catheters
Therefore, a syringe or the like is introduced from the luer connector 15. Filter for Capturing Thrombus of the Present Invention As shown in FIG. 1, it comprises a leaf body 1, a metal tube 2, and a tube shaft 3. The leaf body 1 is formed by forming a fine and stretchable metal wire into a rhombus shape, and the material thereof is not particularly limited, but stainless steel, platinum, biano wire, shape memory alloy wire, superelastic metal wire. Etc. are preferably used. Leaf body 1
The size can be arbitrarily changed depending on the application site of a blood vessel or the like, and the size is not particularly limited.
One end of each of the three leaf bodies 1 is arrayed and fixed to the circumferential groove 4 of the metal tube 2 joined to the tip of the tube shaft 3, and these leaf bodies 1 form a thrombus capturing space. If the leaf bodies are arrayed and fixed so that the adjacent leaf bodies partially overlap each other, it is possible to form a trapping space in which the thrombus is more unlikely to escape. The metal tube 2 is made of lightweight metal and is a connecting tool for connecting the tube shaft 3 and the leaf body 1. As shown in FIG. 2, leaf bodies 1 are erected on the metal cylinder 2 on the circumferential groove 4 at equal intervals and fixed. Further, as will be described later, the metal cylinder 2 is provided with two circumferential grooves, an outer circumferential groove and an inner circumferential groove.
Can also be arranged in double. The central portion of the metal tube 2 serves as the outlet of the inner cavity 5 of the tube shaft 3. The tube shaft 3 is formed by closely winding a metal wire in a spiral shape and has a large elasticity like a spring. A lumen 5 passes through the tube shaft 3, and the thrombus captured is collected from this lumen 5. And this lumen 5
Serves as a passage for an aspiration catheter and an X-ray contrast medium. The size of the tube shaft 3 and its lumen 5 can be arbitrarily changed depending on the application site of a blood vessel or the like, and the size is not particularly limited.
【０００７】本発明における葉体の数は３つに限定され
ず、いくつでも設置できる。葉体の数を増やして密にす
るほど血栓をしっかりと捕捉して回収することができ
る。また、葉体は金属筒の外円周溝上と内円周溝上に二
重に配列することが可能である。図３は６つの葉体が金
属筒の外円周溝６上と内円周溝上７に３つずつ配列固着
され、ロート型の捕捉空間を形成するタイプの血栓捕捉
用フィルターの正面図、図４はその金属筒部分の断面
図、図５はその金属筒部分の拡大図、図６は葉体部分の
上面図である。図４で示すように外円周と内円周の２つ
の円周溝を有しており、葉体１はこれらの円周溝上に等
間隔で植立され、固着されている。また、外円周溝に配
列固着させた葉体の大きさを内円周溝に配列固着させた
葉体よりも大きく構成して、血栓の大小によらずに捕捉
可能な捕捉空間を形成することができる。The number of leaves in the present invention is not limited to three, and any number can be installed. The larger the number of leaf bodies and the closer they are, the more firmly the thrombus can be captured and collected. Further, the leaf bodies can be doubly arranged on the outer circumferential groove and the inner circumferential groove of the metal cylinder. FIG. 3 is a front view of a thrombus-capturing filter of a type in which six leaf bodies are arranged and fixed in threes on the outer circumferential groove 6 and the inner circumferential groove 7 of the metal cylinder to form a funnel-shaped trapping space. 4 is a sectional view of the metal cylinder portion, FIG. 5 is an enlarged view of the metal cylinder portion, and FIG. 6 is a top view of the leaf body portion. As shown in FIG. 4, it has two circumferential grooves, an outer circumference and an inner circumference, and the leaf bodies 1 are planted and fixed on these circumferential grooves at equal intervals. In addition, the size of the leaf body arranged and fixed in the outer circumferential groove is made larger than that of the leaf body arranged and fixed in the inner circumferential groove to form a trapping space that can be trapped regardless of the size of the thrombus. be able to.
【０００８】本発明における葉体の形状は上述の平面菱
形状のものに限定されるものではない。葉体の中央部と
上方部を曲折させて形成した変形葉体を用いることがで
きる。変形葉体を用いると中央部が膨らんだチューリッ
プ型の捕捉空間を形成することができる。このような型
の捕捉空間によれば、ロート型に比べて血栓をさらにし
っかりと捕捉して回収することができる。図７は３つの
変形葉体８から構成され、チューリップ型の捕捉空間を
形成するタイプの血栓捕捉用フィルターの正面図、図８
は６つの変形葉体が金属筒の外円周溝上と内円周溝上に
３つずつ配列固着され、チューリップ型の捕捉空間を形
成するタイプの血栓捕捉用フィルターの正面図である。
図８に示すものは、外円周溝に配列固着させた変形葉体
９の開口径を、内円周溝に配列固着させた変形葉体１０
の開口径よりも大きく構成したタイプのものを示してい
る。このように構成すれば、血栓の大小に関わらずに漏
れなく捕捉することが可能となり、機動性を高めること
ができる。これはロート型の捕捉空間を形成するタイプ
のものについても同様である。図９及び図１０に示すも
のはそれぞれ、図７及び図８に示された変形葉体の先端
を内側に向かって折り返し、フック状の鈎部を形成した
ものを示している。このように構成すれば、フィルター
を取り出す時に捕捉した血栓を漏れなく回収することが
可能となり、機動性を高めることができる。これはロー
ト型の捕捉空間を形成するタイプのものについても同様
である。図１１は３枚の葉体でロート型の捕捉空間を形
成するタイプのフィルターであって、葉体の片側稜線に
任意のピッチを持ったコイルを巻いて固着した血栓捕捉
用フィルターの正面図、図１２は３枚の変形葉体でチュ
ーリップ型の捕捉空間を形成するタイプのフィルターで
あって、変形葉体の片側稜線に任意のピッチを持ったコ
イルを巻いて固着した血栓捕捉用フィルターの正面図で
ある。このようなフィルターによれば、血栓を保持しや
すい形態であるため、より確実に血栓を捕捉し、回収す
ることが可能となる。またコイル１２は片側稜線に限ら
れるものではなく、両側稜線に巻いて固着させたもので
あっても良い。図１３は３枚の葉体でロート型の捕捉空
間を形成するタイプのフィルターであって、葉体の片側
稜線が内側に向かって波状をなす血栓捕捉用フィルター
の正面図、図１４は３枚の変形葉体でチューリップ型の
捕捉空間を形成するタイプのフィルターであって、変形
葉体の片側稜線が内側に向かって波状をなす血栓捕捉用
フィルターの正面図である。このような形状のフィルタ
ーも、血栓を保持しやすい形状であるため、より確実に
血栓を捕捉し、回収することが可能となる。また波状形
態１３は片側稜線に限られるものではなく、両側稜線に
形成させたものであっても良い。図１５は３枚の葉体で
ロート型の捕捉空間を形成するタイプのフィルターであ
って、葉体の開口部近傍から、手元側に向かって複数の
鋸歯を形成した血栓捕捉用フィルターの正面図、図１６
は３枚の変形葉体でチューリップ型の捕捉空間を形成す
るタイプのフィルターであって、変形葉体の開口部近傍
から、手元側に向かって複数の鋸歯を形成した血栓捕捉
用フィルターの正面図である。図１５、図１６に示すよ
うに、各葉体または変形葉体の開口部近傍から、手元側
に向かって複数の鋸歯１４を形成すれば、その鋸状の切
込みにより捕捉力が増加し、捉えた血栓を逃しにくくな
り、血栓の捕捉をより確実なものとすることができる。The shape of the leaf in the present invention is not limited to the above-mentioned planar diamond shape. A deformed leaf body formed by bending the central portion and the upper portion of the leaf body can be used. By using the deformed leaf body, it is possible to form a tulip-shaped trapping space with a bulged central portion. According to such a type of capture space, the thrombus can be captured and collected more firmly than the funnel type. FIG. 7 is a front view of a thrombus-capturing filter of a type that is composed of three modified leaflets 8 and forms a tulip-shaped trapping space.
FIG. 3 is a front view of a thrombus-capturing filter of a type in which six deformed leaves are arranged and fixed in threes on an outer circumferential groove and an inner circumferential groove of a metal cylinder to form a tulip-shaped trapping space.
8 shows a deformed leaf body 10 in which the opening diameter of the deformed leaf body 9 fixedly arranged in the outer circumferential groove is arranged and fixed in the inner circumferential groove.
The size is larger than the opening diameter of. According to this structure, regardless of the size of the thrombus, the thrombus can be captured without leakage, and the mobility can be enhanced. The same applies to the type that forms a funnel-shaped trapping space. 9 and 10 respectively show the deformed leaf bodies shown in FIGS. 7 and 8 in which the tips are folded back inward to form hook-shaped hook portions. According to this structure, the thrombus captured when the filter is taken out can be collected without leakage, and the mobility can be enhanced. The same applies to the type that forms a funnel-shaped trapping space. FIG. 11 is a filter of the type that forms a funnel-shaped trapping space with three leaflets, and is a front view of a thrombus trapping filter in which a coil having an arbitrary pitch is wound around one side ridge of the leaflet and fixed. FIG. 12 is a front view of a thrombus trapping filter in which a tulip-shaped trapping space is formed by three deformed leaves, and a coil having an arbitrary pitch is wound around one side ridge of the deformed leaves to be fixed. It is a figure. According to such a filter, since the thrombus is easily held, it is possible to more reliably capture and collect the thrombus. Further, the coil 12 is not limited to the ridge line on one side, and may be wound and fixed on the ridge lines on both sides. FIG. 13 is a front view of a thrombus trapping filter in which a leaf-shaped trapping space is formed by three leaflets, and one side ridge of the leaflet is corrugated toward the inside, and FIG. 14 is three sheets. FIG. 4 is a front view of a filter for forming a tulip-shaped trapping space in the modified leaflet, wherein the ridgeline on one side of the modified leaflet is corrugated inward toward the inside. Since the filter having such a shape also has a shape that easily holds the thrombus, it becomes possible to more reliably capture and collect the thrombus. Further, the wavy form 13 is not limited to the ridge line on one side, but may be formed on the ridge lines on both sides. FIG. 15 is a front view of a thrombus-capturing filter in which a plurality of blades form a funnel-shaped trapping space, and a plurality of saw teeth are formed from the vicinity of the opening of the leaflet toward the proximal side. 16
Is a filter of a type that forms a tulip-shaped trapping space with three deformed leaves, and is a front view of a thrombus trapping filter in which a plurality of saw teeth are formed from the vicinity of the opening of the deformed leaf toward the proximal side. Is. As shown in FIG. 15 and FIG. 16, if a plurality of saw teeth 14 are formed toward the proximal side from the vicinity of the opening of each leaf body or deformed leaf body, the sawtooth cut increases the trapping force and catches. It becomes difficult to release the thrombus, and the capture of the thrombus can be made more reliable.
【０００９】以上のような血栓捕捉用フィルターを用い
て血栓の捕捉能力を確認するため、以下のような実験を
行った。塩化ビニル製チューブにて作製した静脈ライン
に生理食塩水（比重１.００４）を注入した後、血液回
路用チューブポンプ（東レ. ＴＲ−２６）を使用してこ
れを潅流させることにより、静脈における実験のＩｎ
Ｖｉｔｒｏな環境として近似させた。そしてこのライン
に試料（血栓）を潅流させ、本発明フィルターでの捕捉
の可否を観察した。ここで使用したフィルターは、９つ
の葉体が金属筒の外円周溝上に６つ、内円周溝上に３つ
配列固着され、ロート型の捕捉空間を形成するタイプの
ものである。その実験結果を表１、２に示す。尚、装置
系の諸元については次に示すとおりである。 １. ポンプ 拍出量 ３４０ｍｌ／ｍｉｎ ２. チューブ内流速 太径部 １. ８ｃｍ／ｓｅｃ 細径部 １１. ９ｃｍ／ｓｅｃ ３. チューブ内平均圧力 Ｕｐ １８５ｍｍＨｇ Ｄｏｗｎ ４０ｍｍＨｇ ４. 試料サイズ ３. ０×３. ０×５. ０ｍｍ3 ５. ０×５. ０×５. ０ｍｍ3The following experiment was conducted to confirm the thrombus-capturing ability using the thrombus-capturing filter as described above. After injecting physiological saline (specific gravity 1.004) into the intravenous line made of a vinyl chloride tube, perfusing this using a blood circuit tube pump (Toray TR-26) Experimental In
It was approximated as a Vitro environment. Then, a sample (thrombus) was perfused through this line, and whether or not it was captured by the filter of the present invention was observed. The filter used here is of a type in which nine leaf bodies are arrayed and fixed on the outer circumferential groove of the metal cylinder, six on the outer circumferential groove, and three on the inner circumferential groove to form a funnel-shaped trapping space. The experimental results are shown in Tables 1 and 2. The specifications of the device system are as follows. 1. Pump stroke volume 340 ml / min 2. Flow velocity in tube Large diameter part 1.8 cm / sec Small diameter part 11.9 cm / sec 3. Average pressure in tube Up 185 mmHg Down 40 mmHg 4. Sample size 3.0 × 3.0. 0 x 5.0 mm3 5.0 x 5.0 x 5.0 mm3
【表１】[Table 1]
【表２】以上の結果より、９個の葉体によってロート型の捕捉空
間を形成したタイプのフィルターを使用した場合の捕捉
率は１００％であり、血栓を完全に捕捉する能力のある
ことが確認された。[Table 2] From the above results, it was confirmed that when a filter of the type in which a funnel-shaped trapping space was formed by 9 leaf bodies was used, the trapping rate was 100%, and it had the ability to trap thrombi completely.
【００１０】[0010]
【発明の効果】本発明は、恒久留置するタイプのフィル
ターではなく、一時的な留置によるフィルター作用を目
的にしているので、恒久使用されるフィルターと違っ
て、発生した新生内膜や異物反応等での生成物により血
流を阻害することもない。また、同フィルター内から造
影剤の注入が可能であり、捕捉した血栓の有無や量の確
認が簡便に実施できる。更に捕捉した血栓を除去する事
もできる。従って恒久留置フィルターと異なり、それら
の血流阻害を予防する為の薬剤投与を続ける必要がな
く、患者を薬剤による拘束から解放し、患者のQuality
of Life の向上の役立つものと考えられる。EFFECTS OF THE INVENTION Since the present invention is intended for a filter action by a temporary retention rather than a permanent retention type filter, unlike a filter that is permanently used, a neointima, a foreign body reaction, etc. that have occurred are generated. It also does not interfere with blood flow by the products of. Further, the contrast agent can be injected from the inside of the filter, and the presence or amount of the captured thrombus can be easily confirmed. It is also possible to remove the captured thrombus. Therefore, unlike permanent indwelling filters, there is no need to continue drug administration to prevent blood flow obstruction, releasing patients from drug restraints and improving patient quality.
It is considered to be useful for improving the of Life.
【図１】３つの葉体から構成され、ロート型の捕捉空間
を形成するタイプの血栓捕捉用フィルターの正面図FIG. 1 is a front view of a thrombus-capturing filter that is composed of three leaves and forms a funnel-shaped trapping space.
【図２】同上の金属筒部分の断面図FIG. 2 is a cross-sectional view of a metal cylinder portion of the above.
【図３】６つの葉体が金属筒の外円周溝上と内円周溝上
に３つずつ配列固着され、ロート型の捕捉空間を形成す
るタイプの血栓捕捉用フィルターの正面図FIG. 3 is a front view of a thrombus-capturing filter of a type in which six lobes are arranged and fixed in threes on an outer circumferential groove and an inner circumferential groove of a metal cylinder to form a funnel-shaped trapping space.
【図４】同上の金属筒部分の断面図FIG. 4 is a cross-sectional view of the metal tube portion of the above.
【図５】同上の金属筒部分の拡大図FIG. 5 is an enlarged view of the metal cylinder portion of the above.
【図６】同上の葉体部分の上面図FIG. 6 is a top view of the leaf part of the same.
【図７】３つの変形葉体から構成され、チューリップ型
の捕捉空間を形成するタイプの血栓捕捉用フィルターの
正面図FIG. 7 is a front view of a thrombus-capturing filter of a tulip-shaped trapping space that is formed of three deformed leaves.
【図８】６つの変形葉体が金属筒の外円周溝上と内円周
溝上に３つずつ配列固着され、チューリップ型の捕捉空
間を形成するタイプの血栓捕捉用フィルターの正面図FIG. 8 is a front view of a thrombus-capturing filter of a type in which six deformed leaf bodies are arranged and fixed in threes on an outer circumferential groove and an inner circumferential groove of a metal cylinder to form a tulip-shaped trapping space.
【図９】図７のフィルターであって、変形葉体の先端を
内側に向かって折り返し、フック状の鈎部を形成した血
栓捕捉用フィルターの正面図9 is a front view of the filter of FIG. 7, which is a filter for catching thrombus in which the tip of the deformed leaf is folded back inward to form a hook-shaped hook portion.
【図１０】図８のフィルターであって、変形葉体の先端
を内側に向かって折り返し、フック状の鈎部を形成した
血栓捕捉用フィルターの正面図FIG. 10 is a front view of the filter of FIG. 8, which is a filter for catching thrombus in which the tip of the deformed leaf is folded back inward to form a hook-shaped hook.
【図１１】３枚の葉体でロート型の捕捉空間を形成する
タイプのフィルターであって、葉体の片側稜線に任意の
ピッチを持ったコイルを巻いて固着した血栓捕捉用フィ
ルターの正面図FIG. 11 is a front view of a filter for trapping a thrombus, which is a type of filter in which a funnel-shaped trapping space is formed by three lobes, and a coil having an arbitrary pitch is wound around a ridge line on one side of the lobes to be fixed.
【図１２】３枚の変形葉体でチューリップ型の捕捉空間
を形成するタイプのフィルターであって、葉体の片側稜
線に任意のピッチを持ったコイルを巻いて固着した血栓
捕捉用フィルターの正面図FIG. 12 is a front view of a filter for trapping a thrombus, which is a type of filter that forms a tulip-shaped trapping space with three deformed leaves, and a coil having an arbitrary pitch is wound around and fixed to a ridge line on one side of the leaflet. Figure
【図１３】３枚の葉体でロート型の捕捉空間を形成する
タイプのフィルターであって、葉体の片側稜線が内側に
向かって波状をなす血栓捕捉用フィルターの正面図FIG. 13 is a front view of a thrombus trapping filter that is a filter of a type that forms a funnel-shaped trapping space with three leaflets and in which a ridge line on one side of the leaflet is corrugated inward.
【図１４】３枚の変形葉体でチューリップ型の捕捉空間
を形成するタイプのフィルターであって、変形葉体の片
側稜線が内側に向かって波状をなす血栓捕捉用フィルタ
ーの正面図FIG. 14 is a front view of a thrombus trapping filter in which a tulip-shaped trapping space is formed by three deformed leaflets, and a ridge line on one side of the deformed leaflet corrugates inward.
【図１５】３枚の葉体でロート型の捕捉空間を形成する
タイプのフィルターであって、葉体の開口部近傍から、
手元側に向かって複数の鋸歯を形成した血栓捕捉用フィ
ルターの正面図FIG. 15 is a filter of a type that forms a funnel-shaped trapping space with three leaf bodies,
Front view of a thrombus-capturing filter that has a plurality of serrated teeth toward the proximal side
【図１６】３枚の変形葉体でチューリップ型の捕捉空間
を形成するタイプのフィルターであって、変形葉体の開
口部近傍から、手元側に向かって複数の鋸歯を形成した
血栓捕捉用フィルターの正面図FIG. 16 is a filter of a type that forms a tulip-shaped trapping space with three deformed leaves, and a thrombus trapping filter in which a plurality of saw teeth are formed from the vicinity of the opening of the deformed leaf toward the proximal side. Front view of
【図１７】図１のフィルターに逆止弁、ルーアコネクタ
ーを含めた装置全体の正面図FIG. 17 is a front view of the entire apparatus including a check valve and a luer connector in the filter of FIG.
１ 葉体 ２ 金属筒 ３ チューブシャフト ４ 円周溝 ５ 内腔 ６ 外円周溝 ７ 内円周溝 ８ 変形葉体 ９ 外円周溝に配列固着させた変形葉体 １０ 内円周溝に配列固着させた変形葉体 １１ 鈎部 １２ コイル １３ 波状形態 １４ 鋸歯 １５ ルーアコネクター １６ 逆止弁 DESCRIPTION OF SYMBOLS 1 Leaf body 2 Metal cylinder 3 Tube shaft 4 Circumferential groove 5 Inner cavity 6 Outer circumferential groove 7 Inner circumferential groove 8 Deformed leaf body 9 Arranged in outer circumferential groove Deformed leaf body 10 Arranged in inner circumferential groove Fixed deformed leaf body 11 Hook part 12 Coil 13 Wavy form 14 Saw tooth 15 Luer connector 16 Check valve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 神力 勇二 神奈川県横浜市都筑区牛久保西２−15−３ 西尾テラス101号室 (72)発明者 藤田 克憲 愛知県大府市横根町箕手60番地15 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Shinriki Nishio Terrace Room 101, 2-15-3 Ushikubo Nishi, Tsuzuki-ku, Yokohama City, Kanagawa Prefecture (72) Inventor Katsunori Fujita 60, Minote, Yokone-cho, Obu-shi, Aichi 15
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7003166AJPH08187294A (en) | 1995-01-12 | 1995-01-12 | Filter for thrombus catching |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7003166AJPH08187294A (en) | 1995-01-12 | 1995-01-12 | Filter for thrombus catching |
| Publication Number | Publication Date |
|---|---|
| JPH08187294Atrue JPH08187294A (en) | 1996-07-23 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7003166APendingJPH08187294A (en) | 1995-01-12 | 1995-01-12 | Filter for thrombus catching |
| Country | Link |
|---|---|
| JP (1) | JPH08187294A (en) |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal | Free format text:JAPANESE INTERMEDIATE CODE: A02 Effective date:20040525 |