JPH08187294A - Filter for thrombus catching - Google Patents

Filter for thrombus catching

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Publication number
JPH08187294A
JPH08187294A JP316695A JP316695A JPH08187294A JP H08187294 A JPH08187294 A JP H08187294A JP 316695 A JP316695 A JP 316695A JP 316695 A JP316695 A JP 316695A JP H08187294 A JPH08187294 A JP H08187294A
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Prior art keywords
filter
hatay
thrombus
leaf
circumferential groove
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JP316695A
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Japanese (ja)
Inventor
Katsunori Fujita
Yuji Jinriki
Kazunori Kuroki
Hisayuki Mukai
Mitsuaki Saeki
光明 佐伯
久行 向井
勇二 神力
克憲 藤田
一典 黒木
Original Assignee
Clinical Supply:Kk
Line Purodatsuku:Kk
有限会社ラインプロダック
株式会社クリニカル・サプライ
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Abstract

PURPOSE: To provide a device capable of inserting simply by a percutaneous filter insertion method and having sufficient filter action not by permanent indwelling but by temporary inserting.
CONSTITUTION: This filter is composed of plural extensible pyramidal leaf bodies 1 formed with an extensible metallic wire, and a funnel type catching space is formed by arranging and fixing the one end of each leaf body 1 on a circular ditch 4 of a metallic cylinder 2 joined to the tip of a tube shaft 3.
COPYRIGHT: (C)1996,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は静脈内の血栓を捕捉し、 The present invention relates captures thrombus intravenous,
塞栓症を処理または防止するフィルターに関する。 It relates to a filter to handle or prevent the 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。 In recent years, pulmonary embolism as well as ischemic heart disease and cerebrovascular disorders, came to be seen more as a medical emergency. 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。 As the cause of venous thrombosis as a pulmonary embolism, such blood flow stasis, venous intima loss recovery and coagulation abnormalities can be mentioned, anticoagulant therapy, thrombolytic therapy as emergency or prophylactic treatment against these, thrombectomy surgery, vein blocking procedure is performed inferior vena. 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。 Of these, in the case of inferior vena cava blocking procedure is performed laparotomy under general anesthesia, ligated inferior vena cava, plication or a method of pinching clips, filters for various thrombotic the venous through under local anesthesia there is a method to insert. 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。 However, the former method, it general anesthesia is required, for reasons such as formation prone thrombus caused by discontinuation of anticoagulant therapy prior to surgery, is recently percutaneous filter insertion method allows a local anesthetic is performed it has become many. 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。 Generally filter used has a small umbrella shape consisting of those of the branch with a plurality of flexible to be expanded radially. 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。 In contracted state, those ramified is inserted into a vein in the state they extend substantially parallel to one another. 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。 Once those inside put is the branch of the vein automatically spread outward, it is possible to secure the filter to the wall of the vein. 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。 Then, the filter is left indefinitely until there is no risk of pulmonary embolism in the patient. 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) However, because it has a hook at the lower end of the strut in order to reliably fix the time of placement of the filter, after filter deployment, over time (about 2-3 weeks)
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。 Neointimal will cover developed around the filter. 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。 Therefore, both the inhibition of venous blood flow, there is a problem that can not be extracted when you want to retrieve finishing role. 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。 In addition, patients using such devices is, must be naturally considered as prothrombotic state is progressing very. 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。 In other words, it is placed metallic foreign substance intravascular patients, there is a possibility of generating a new thrombus as foreign body response on filter. 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。 As prevention of the above, patients after filter insertion should continue to receive anticoagulant medication 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。 For the above reasons [SUMMARY OF THE INVENTION] An object of the present invention is to propose a new device that overcomes the disadvantages of the aforementioned type. 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。 That is, if it is thrombus formation tends state operation or the like, percutaneous filter easily can be operated by insertion method, extraction rather difficult permanent indwelling type, required period only temporarily possible placement of postoperative etc. in is to provide an apparatus with enough blood thrombus capturing effect.

【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。 To achieve the present invention as described above object, according to an aspect of, there is provided a blood thrombus capturing filter as follows. 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。 That is, a filter composed of a stretchable rhombic shape the formed retractable plurality of leaf members by a metal wire, the one end of each leaf member in a circumferential groove in the metal tube joined to the tube shaft tip the by arranging fixed a thrombus capture filter to form a trapping space of the funnel-type.

【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。 According to the present invention, a plurality of filters formed in a rhombic shape with stretchable metal wire (Hatay) capturing thrombus. 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。 And by joining the tubular shaft with a lumen at one end of the filter, percutaneously recovering the filter devices. つまり、フィルターが捕捉した血栓を回収する。 In other words, to recover the thrombus filter has been captured. 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。 Further, if the suction through the suction catheter into the lumen of the tube shaft, thrombosis can be induced trapped in the filter. 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。 Further, if the injection or direct injection of contrast agent inserts a thin catheter into the lumen of the tube shaft, the amount of recovered thrombus, state, etc. can be confirmed under X-ray fluoroscopy. 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。 That is, using the present invention thrombus collecting, and even allows situational awareness 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。 It will be described based on the drawings an embodiment of EXAMPLES The invention. 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。 Figure 1 is composed of three leaf body, front view of the type of the thrombus capture filter to form a trapping space of the funnel-type, FIG. 2 is a sectional view of the metal tube part. また、図1 In addition, FIG. 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。 7 check valve shows a front view of the entire apparatus, including the luer connector. 造影剤や細径カテーテルは逆止弁16 Contrast agent and a small diameter catheter check valve 16
から、シリンジ等はルーアコネクター15から導入する。 From, syringes, etc. is introduced from the luer connector 15. 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。 Hatay 1 as shown in thrombus capture filter Figure 1 of the present invention, the metal tube 2 and a tube shaft 3. 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。 Hatay 1 is obtained by molding a stretchable metal wire rhombic shape in fine, but its material is not particularly limited, stainless steel, platinum, Viano line, shape memory alloy wire, super elastic metal wire it is preferable to use, and the like. 葉体1 Hatay 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。 The size of, as it can be arbitrarily changed by the application location such as a blood vessel, is not particularly limited sizes.
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。 Three one end of the leaf member 1 is arranged fixed to the circumferential groove 4 of the metal cylinder 2 joined to the tube shaft 3 tip, the blood thrombus capturing space is formed by these leaf member 1. 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。 And it is possible adjacent leaf body if caused to SEQ fixing the Hatay to overlap partially with each other, to form the relief hardly trapping space more thrombus. 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。 The metal tube 2 is made of lightweight metal, of the connector tube shaft 3 and Hatay 1. 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。 The metal cylinder 2 as shown in Figure 2, Hatay 1 is planted at equal intervals on the circumferential groove 4, is fixed. 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 Further, the two circumferential grooves in the outer circumferential groove and the inner circumferential groove formed in the metal tube 2 as described later, Hatay 1
を二重に配列することもできる。 The can be arranged in double. 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。 The central portion of the metal tube 2 is an outlet of the lumen 5 of the tube shaft 3. 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。 Tubular shaft 3 are those that closely Involving metal wire helically, having a large resiliency as springs. 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。 The tube shaft 3 and through the lumen 5, and recovering the captured thrombus from the lumen 5. そしてこの内腔5 And this lumen 5
は吸引カテーテルやX線造影剤の通路となっている。 Has a passage of the suction catheter and X-ray contrast agent. 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。 The size of the tube shaft 3 and the lumen 5, as it can be arbitrarily changed by the application location such as a blood vessel, is not particularly limited sizes.

【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。 [0007] The number of leaf material in the present invention is not limited to three, it can be installed any number. 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。 Increase the number of leaves bodies can be recovered firmly capturing thrombus enough to close. 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。 Further, Hatay is can be arranged in duplicate on the outer circumference-groove and the inner circumferential groove of the metal tube. 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。 Figure 3 is six leaf body is arranged fixed one by 3 outside the circumferential groove 6 and on the inner circumferential-groove 7 of the metal tube, a front view of the type of the thrombus capture filter to form a trapping space of the funnel-type, FIG. 4 is a sectional view of the metal tube portion, FIG. 5 is an enlarged view of the metal tube portion, FIG. 6 is a top view of the Hatay portion. 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。 Figure 4 has an outer circumference and two circumferential groove in the inner circumference as shown, Hatay 1 is erected at equal intervals on these circumferential grooves, it is fixed. 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。 Also, by increasing construction than Hatay which are arranged fixed to the inner circumferential groove leaf size of bodies are arranged fixed to the outer circumferential groove, to form a catchable trapping space regardless of the magnitude 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。 [0008] The shape of the leaf material in the present invention is not intended to be limited to rhombic plane described above. 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。 Is bent central portion and the upper portion of Hatay can be used deformable leaf body formed by. 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。 With deformable leaf body swelled central portion may form a trapping space of the tulip-shaped. 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。 According to trapping space of such type, it is possible to further firmly caught and recovered thrombi as compared to funnel type. 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 Figure 7 is composed of three variations leaf body 8, a front view of the type of the thrombus capture filter to form a trapping space of the tulip type, FIG. 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。 Six deformed leaf body is arranged fixed in triplicate on the outer circumference-groove and the inner circumferential groove of the metal tube is a front view of the type of the thrombus capture filter to form a trapping space of the tulip-shaped.
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 Those shown in FIG. 8, the opening diameter of the deformable leaf member 9 is arranged fixed to the outer circumferential groove, the inner circumferential groove in SEQ anchored allowed deformation leaves 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。 It indicates those larger constructed type than the opening diameter. 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。 With this configuration, it is possible to capture not leak regardless of the size of the thrombus, it is possible to enhance the mobility. 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。 This also applies to a type that forms a trapping space of the funnel-type. 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。 Each one shown in FIGS. 9 and 10, folded towards the front end of the deformation leaf body shown in FIGS. 7 and 8 inwardly illustrates one formed a hook-shaped hook portion. 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。 With this configuration, it is possible to recover without omission thrombus captured when taking out the filter, it is possible to enhance the mobility. 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。 This also applies to a type that forms a trapping space of the funnel-type. 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。 Figure 11 is a type of filter that forms a trapping space of the funnel-type leaves of three, a front view of the blood thrombus capturing filter which is fixed by winding a coil having an arbitrary pitch on one side ridgeline of the leaf members, Figure 12 is a type of filter that forms a trapping space of the tulip-shaped in deformed leaves of three, the front of the thrombus capture filter which is fixed by winding a coil having an arbitrary pitch on one side ridgeline of the deformed leaf member it is a diagram. 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。 According to such a filter, because it is easy to form and hold a thrombus to capture more reliably thrombus, it is possible to recover. 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。 The coil 12 is not limited to one side ridgeline, or may be firmly fixed wound on both sides the edge line. 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。 Figure 13 is a type of filter that forms a trapping space of the funnel-type leaves of three, a front view of the blood thrombus capturing filter which forms a wavy side edge line of the leaf body inward, FIG. 14 is three a type of filter that in the deformed leaf member forming a trapping space of the tulip type, one side edge line of the deformed leaf member is a front view of the blood thrombus capturing filter which forms a wavy inwardly. 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。 Filter having such a shape is also because it is easily shaped holding the thrombus capture more reliably thrombus, it is possible to recover. 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。 The wavy form 13 is not limited to one side ridgeline, or may be allowed to form on either side ridge. 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 Figure 15 is a type of filter that forms a trapping space of the funnel-type leaves of three, from near the opening of the leaf body, front view of the blood thrombus capturing filter having a plurality of serrations towards the proximal , as shown in FIG. 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。 Is a type of filter that forms a trapping space of the tulip-shaped in deformed leaves of three, from near the opening of the deformable leaf body, front view of the blood thrombus capturing filter having a plurality of serrations towards the proximal it is. 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。 As shown in FIG. 15, FIG. 16, the opening vicinity of each leaf form or modified leaf body, by forming a plurality of saw teeth 14 toward the proximal side, trapping force is increased by the serrated cut, grasped thrombus hardly missed, it is possible to make the capture of thrombus 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。 [0009] In order to confirm the capture ability of thrombosis using the thrombus capture filter as described above, the following experiment was carried out. 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 After injection of saline (specific gravity 1.004) into the venous line was prepared in polyvinyl chloride tube, by perfusion this using blood circuit tube pump (Toray. TR-26), in venous in the experiment
Vitroな環境として近似させた。 It was approximated as Vitro environment. 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。 And allowed to perfuse the sample (blood clot) in the line, it was observed whether the acquisition of the present invention the filter. 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。 Filter used here, six on the outer circumferential groove of nine leaf body metal tube is secured three arranged on the inner circumferential groove, it is of a type which forms a trapping space of the funnel-type. その実験結果を表1、2に示す。 The experimental results are shown in Tables 1 and 2. 尚、装置系の諸元については次に示すとおりである。 Note that the specifications of the apparatus system is as shown below. 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. 0mm 3 5. 0×5. 0×5. 0mm 3 1. Pump stroke volume 340 ml / min 2. small-diameter portion velocity the large-diameter portion 1. 8 cm / sec tube 11. 9cm / sec 3. the tube average pressure Up 185mmHg Down 40mmHg 4. Sample size 3. 0 × 3. 0 × 5. 0mm 3 5. 0 × 5. 0 × 5. 0mm 3

【表1】 [Table 1]

【表2】 [Table 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。 These results, the capture rate in the case of using a type of filter to form a trapping space of the funnel-type by nine leaf body is 100%, it was confirmed that the ability to fully capture the thrombi.

【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。 According to the present invention, rather than the type of filter to be permanent indwelling, since the purpose of the filter effect due to temporary placement, unlike filter is permanently used, it generated neointimal or foreign body reactions like nor to inhibit blood flow through product in. 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。 Moreover, it allows the injection of the contrast agent from the same filter, confirmation of the presence or amount of the captured thrombus can be carried out easily. 更に捕捉した血栓を除去する事もできる。 It can also be removed further captured thrombus. 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 Thus unlike the permanent indwelling filters, it is not necessary to continue the medication for preventing their bloodstream inhibition releasing the patient from the restriction by the drug, the patient's Quality
of Life の向上の役立つものと考えられる。 It is believed that help the improvement of of Life.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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 [1] consists of three leaf body, front view of the type of the thrombus capture filter to form a trapping space of the funnel-type

【図2】同上の金属筒部分の断面図 2 is a cross-sectional view of the metal tube portion of the same

【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 [3] Six leaf body is arranged fixed in triplicate to the outer circumferential-groove and the inner circumferential on the groove of the metal tube, a front view of the type of the thrombus capture filter to form a trapping space of the funnel-type

【図4】同上の金属筒部分の断面図 4 is a cross-sectional view of the metal tube portion of the same

【図5】同上の金属筒部分の拡大図 Figure 5 is an enlarged view of the metal tube portion of the same

【図6】同上の葉体部分の上面図 Figure 6 is a top view of the Hatay portion 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 [7] consists of three variants leaf body, front view of the type of the thrombus capture filter to form a trapping space of the tulip-shaped

【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 [8] 6 variant leaf body is arranged fixed in triplicate on the outer circumference-groove and the inner circumferential groove of the metal tube, a front view of the type of the thrombus capture filter to form a trapping space of the tulip-shaped

【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] A filter of FIG. 7, the folded tip of the deformed leaf body inward, front view of the blood thrombus capturing filter which is formed 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 [10] A filter of FIG. 8, the folded tip of the deformed leaf body inward, front view of the blood thrombus capturing filter which is formed a hook-shaped hook portion

【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 [11] A type of filter that forms a trapping space of the funnel-type with three leaves of a front view of the blood thrombus capturing filter which is fixed by winding a coil having an arbitrary pitch on one side ridgeline of the leaf member

【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 [12] A type of filter that forms a trapping space of the tulip-shaped with three variations leaf body, the front of the thrombus capture filter which is fixed by winding a coil having an arbitrary pitch on one side ridgeline of the leaf member drawing

【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 [13] A type of filter that forms a trapping space of the funnel-type with three leaves of a front view of the blood thrombus capturing filter which forms a wavy side edge line of the leaf body 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 [14] A type of filter that forms a trapping space of the tulip-shaped with three variations leaf body, front view of the blood thrombus capturing filter which forms a wavy side edge line of the deformed leaf body 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、 [15] A type of filter that forms a trapping space of the funnel-type with three leaves of, from the vicinity of the opening leaf body,
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 Front view of a thrombus capture filter having a plurality of serrations towards the proximal

【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 [16] A type of filter that forms a trapping space of the tulip-shaped with three variations leaf body, from near the opening of the deformable leaf body, the thrombus capture filter having a plurality of serrations towards the proximal front view of the

【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 [17] filters in the check valve of FIG. 1, a front view of the entire apparatus, including the luer connector

【符号の説明】 DESCRIPTION OF SYMBOLS

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 1 Hatay second metal tube 3 tube shaft 4 circumferential grooves 5 lumen 6 outer circumferential groove 7 in the circumferential groove 8 deforms the leaf member 9 outside circumferential groove in SEQ secured deform the leaf member 10 in a circumferential groove in the sequence was anchoring deformable leaves 11 which is hook portion 12 coil 13 wavy form 14 serrated 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 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor divine power Yuji Yokohama, Kanagawa Prefecture Tsuzuki-ku Ushikubonishi 2-15-3 Nishio terrace 101, room (72) inventor Katsunori Fujita Aichi Prefecture Obu Yokone-cho, Minote 60 address 15

Claims (13)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 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。 1. A filter constituted by elasticized rhombic shape the formed retractable plurality of leaf members by a metal wire, each leaf in the circumferential groove of the metal tube which is joined to the tube shaft tip thrombus capture filter with one end of the body is arranged fixed to form a trapping space of the funnel-type.
  2. 【請求項2】 葉体の中央部を内側に、上方部を外側に曲折させて形成した変形葉体を配列固着させてチューリップ型の捕捉空間を形成した請求項1記載の血栓捕捉用フィルター。 Wherein a central portion of Hatay inside, blood thrombus capturing filter of claim 1, wherein the upper portion of the deformable leaf body formed by bent outwardly are arranged fixed to form a trapping space of the tulip-shaped.
  3. 【請求項3】 葉体または変形葉体の先端を内側に向かって曲折させ、鈎部を形成した請求項1、2記載の血栓捕捉用フィルター。 3. Hatay or the tip of the deformed leaf body inwardly is bent, blood thrombus capturing filter of claim 1, wherein the formation of the hook portion.
  4. 【請求項4】 葉体または変形葉体の片側稜線または両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請求項1、2記載の血栓捕捉用フィルター。 4. Hatay or thrombus capture filter according to claim 1, wherein the fixed by winding a coil having an arbitrary pitch on one ridge or both sides ridge of deformable leaf member.
  5. 【請求項5】 葉体または変形葉体の片側稜線または両側稜線が内側に向かって波状をなす請求項1、2記載の血栓捕捉用フィルター。 5. Hatay or thrombus capture filter according to claim 1, wherein one edge line or on both sides the edge line of the deformed leaf body forms a wavy inwardly.
  6. 【請求項6】 金属筒の外円周溝と内円周溝にそれぞれ複数の葉体または変形葉体を配列固着させた請求項1〜 6. The method of claim 1 in which each of the outer circumferential groove and the inner circumferential groove of the metal tube was arranged fixed multiple leaf, or modified leaf member
    5記載の血栓捕捉用フィルター。 5 thrombus capture filter described.
  7. 【請求項7】 外円周溝に配列固着させた葉体または変形葉体の開口径を、内円周溝に配列固着させた葉体または変形葉体の開口径よりも大きく構成した請求項6記載の血栓捕捉用フィルター。 7. A claim that outside the aperture diameter of the circumferential groove in SEQ anchored allowed the Hatay or modified leaf member was larger configuration than the opening diameter of the inner circumferential groove in SEQ anchored allowed the Hatay or modified leaf member thrombus capture filter of 6 described.
  8. 【請求項8】 外円周溝あるいは内円周溝のいずれか、 8. The one of the outer circumferential groove or the inner circumferential groove,
    または両方に配列固着した葉体または変形葉体の先端を内側に向かって曲折させ、鈎部を形成した請求項6、7 Or both is bent the leading end of the array firmly adhered Hatay or modified leaf body inward, claim 6 and 7 to form a hook portion
    記載の血栓捕捉用フィルター。 Thrombus capture filter described.
  9. 【請求項9】 外円周溝あるいは内円周溝のいずれか、 9. Any of the outer circumferential groove or the inner circumferential groove,
    または両方に配列固着した葉体または変形葉体の片側稜線または両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請求項6、7記載の血栓捕捉用フィルター。 Or Hatay or thrombus capturing filter of claim 6, wherein the fixed by winding a coil having an arbitrary pitch on one ridge or both sides ridge of deformable leaf body both arranged fixed to.
  10. 【請求項10】 外円周溝あるいは内円周溝のいずれか、または両方に配列固着した葉体または変形葉体の片側稜線または両側稜線が内側に向かって波状をなす請求項6、7記載の血栓捕捉用フィルター。 10. A outer circumferential either grooves or the inner circumferential groove, or one ridge or both edge lines of Hatay or variations leaf member which is arranged fixed to both claim 6 wherein forming a wavy inwardly thrombus capture filter.
  11. 【請求項11】 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を形成した請求項1〜 From the opening near the 11. Hatay or modified leaf member, according to claim 1 in which a plurality of serrations towards the proximal
    10記載の血栓捕捉用フィルター。 Thrombus capture filter described 10.
  12. 【請求項12】 隣接する葉体または変形葉体が相互に一部分重なり合うように葉体または変形葉体を配列固着させた請求項1〜11記載の血栓捕捉用フィルター。 12. Adjacent Hatay or thrombus capturing filter of claim 1 to 11, wherein the deformable leaf body was arranged fixed to Hatay or modified leaf member to overlap a portion to each other.
  13. 【請求項13】チューブシャフトにX線造影剤等の薬剤注入や細径カテーテル挿入用の内腔を設けた請求項1〜 13. The method of claim 1 in which a drug infusion and the lumen for thin catheterization X-ray contrast agents such as the tube shaft
    12記載の血栓捕捉用フィルター。 Thrombus capture filter described 12.
JP316695A 1995-01-12 1995-01-12 Filter for thrombus catching Pending JPH08187294A (en)

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