JPS6141444A - 折りたたみ式フイルタ−バスケツト - Google Patents

折りたたみ式フイルタ−バスケツト

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Publication number
JPS6141444A
JPS6141444A JP11130285A JP11130285A JPS6141444A JP S6141444 A JPS6141444 A JP S6141444A JP 11130285 A JP11130285 A JP 11130285A JP 11130285 A JP11130285 A JP 11130285A JP S6141444 A JPS6141444 A JP S6141444A
Authority
JP
Japan
Prior art keywords
basket
filter basket
filter
rotating body
dimensional rotating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11130285A
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English (en)
Other versions
JPH0554344B2 (ja
Inventor
アルネ・モルガールト・ニールセン
ロルフ・グンター
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
William Cook Europe ApS
Original Assignee
William Cook Europe ApS
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Publication date
Application filed by William Cook Europe ApS filed Critical William Cook Europe ApS
Publication of JPS6141444A publication Critical patent/JPS6141444A/ja
Publication of JPH0554344B2 publication Critical patent/JPH0554344B2/ja
Granted legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2/0108—Both ends closed, i.e. legs gathered at both ends
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01—Filters implantable into blood vessels
    • A61F2002/016—Filters implantable into blood vessels made from wire-like elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/005—Rosette-shaped, e.g. star-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0071—Three-dimensional shapes spherical
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0073—Quadric-shaped
    • A61F2230/0076—Quadric-shaped ellipsoidal or ovoid

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Transplantation (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Cardiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • External Artificial Organs (AREA)
  • Centrifugal Separators (AREA)
  • Prostheses (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Packages (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 本発明は患者の血管への導入に応用され、各々の末端が
互に結合されている複数の弾力性のある針金から成る折
りたたみ式フィルターバスケットに関する。
本発明は限定するわけではないが特に、大静脈（良好で
あるのは下部大静脈〕に導入し、静脈を通って流れる血
液中の血栓または枠子を補促してそれらが患者の肺に到
達して肺塞栓７起こすのン阻止する装置に関する。本明
細書の一部として含む文献としてキンメル（Ｋｊｍｍｅ
］、）により１９７６年４月２７日に出願された米国特
許第３．９５２．７４７号の明細書には背景技術のより
包括的な分析およびその時点における大静脈フィルター
に関する技術について記載されている。
従来の技術 より最近、ニチノール（ｎｊ、ｔｉｎｏｌ）　　と称さ
れる熱形状記憶合金で製作した大静脈フィルターが医学
文献に記載されている。最初高温で形成され、カテーテ
ルにより大静脈に位置された後に起るであろう拡がった
状態ではフィルターはかなり平たいかさ様円錐形であり
、枠子補促メツシュは個々の針金により形成される相交
わった複数の環として規定される。冷却してまっすぐに
した後比較的に狭いカテーテルを通してフィルターが運
ばれ、大静脈に位置せしめた時体温を受けて上に記載し
たごとき機能的な形に拡がるであろう。
発明が解決しようとする問題点 ニチノールフィルターの配置の原理はがなり単純ではあ
るが、フィルターに関連していくつかの問題がある。施
用に先立ってフィルターを水冷塩溶液中にフィルターを
保ち、施用操作の間カテーテルは連続的に水冷塩溶液を
流さなければならない必要性がある。第一にフィルター
が最適に配置されなかったりまたは方向が悪くても、体
温では針金物質は拡がったフィルターをまっすぐに伸ば
しカテーテルに引き込むのに必要であろう柔軟性を持っ
ていないので修正がほとんど困難である。
問題を解決するための手段 単純で経皮的な技術により施用には従来のものと同様に
適しており、しかも既知のニチノールフィルターが遭遇
する前記の問題が改善された改良フィルターバスケラ）
Ｙ提供するのが本発明の目的である。本発明に従うと、
フィルターバスケットはその拡がったおよび弛緩した状
態においては、とがった末端を持つ孔のあいた引延ばさ
れた立体回転体の形と仮定され、さらに、前記末端間で
測定したバスケットの長さは、少くともその最大の直径
に等しい。
血管内へ導入された後、上皮の増殖によるフィルターが
永久的に静脈壁にとどまっていない間は（実際的には導
入後約１週間まで）、本発明によるフィルターバスケッ
トはもし必要と考えられたられずかに異る位置または方
向に容易に移動させる事ができる。これはフィルターバ
スケットの特徴的な形によりその拡がった形から比較的
大きな力を加える必要なくまっすぐにできるため可能で
あり、この事はフィルターの施用に使用したカテーテル
により、カテーテル中ヘフイルターを引っばり戻すかま
たはカテーテルをフィルターバスケットの上に押す事に
より実施できる。フィルターを完全に回収するのさえ可
能であり、上暑参照すると最初の期間内にこの事を明ら
かにするのが望ましくまた必要である。フィルターバス
ケットは相対的に安価で容易に加工できる通常の生体医
学用の品質のステンレス鋼で作製できる。
新規のフィルターバスケットのさらなる利点は、事実上
ガスケット（最大バスケット直径のところで）および静
脈壁間の接触している円周線の上流および下流に各々２
系列一連結フイルター表面が位置している事である。上
流フィルグー表面の外部に捕えられた枠子は徐々に血流
の影響下接触線のすぐ前の環状の”くさび″へ移動し、
そこで蓄積する。上流フィルター表面を通る血流に伴っ
て・ぐスケットの内部に到達した枠子は下流フィルター
表面の内部に捕えられその表面の中心領域に蓄積する。
フィルターを通る血流の自由な領域を著しく制限する事
なく両方の位置にかなシ大きな栓子の塊が形成されるの
がみられるであろう。
本発明の更なる利点は以下の図により例示される良好な
実施態様の以下の記載により明らかになるであろう。
本発明の原理の理解の促進のため図で例示される実施態
様を参考にし、それを記載するために特定の言葉を使用
するであろう。しかし、例示された装置の変法および改
良、および本発明に関係する当業者に通常起り、その中
で企図されるような例示された装置のさらなる改良およ
び本発明の原理の更なる応用が本発明の範囲を制限する
ものとして意図されているわけではない事を理解された
い。
第１図は１で一般的に示され、適当な物質（良好である
のはステンレス鋼合金うでできた複数の細い弾力性のあ
る針金２でできた大静脈フィルター’＆例示している。
図１に例示したごとく、バスケット１は一般的に第１図
の点−ダッシュ線３ＴＬより示された回転軸のまわりの
シヌソイド曲線（それは末端の母線への接線）の回転か
ら生じる引延ばされた、孔を持つ立体回転体の形をして
いる。各々のバスケット本体の末端で、針金は短いフェ
ルール４により互に結合され、はんだ付けのごとき適当
な方法により針金ケ固定する。
第１図に示したごとく、バスケット長のその最大直径（
後で生じる対称な中心面で、即ち第４図に示した断面図
〕に対する比は約２である。との比の正確な値はフィル
ターガスケットに依存して限定的ではなく、実際には１
．５から３の間またはそれより高い値（多分、高い値で
の改良はほとんど益がないけれども）が仮定される事を
理解されたい。
第１図および第４図から明らかなように、末端フェルー
ル４０聞咎々の針金２はへリツクス様曲線に従い、すべ
ての曲線は同様であり、例えば右周りのような同じ°゛
向き″ヲ持っている。一つの末端から他の末端まで各々
の針金２は軸３に対し約９０°　゛ねじれて”いる。
第１図の小さい、長方形の針金２と同様の針金のはとめ
金が各１々のフェルール４に確保されており、バスケッ
ト１の軸にそって咲き出している。
はとめ金５およびめあったホックまたはその他のものに
より、挿入針金の末端で装置がしっかりとつかまれ、折
りたたみ式フィルターバスケットは挿入カテーテルを通
して押したり、引いたりできる（前に簡単に説明した通
り）。
複数の固定用脚６（例えば５本〕が第１図の右手のフェ
ルール４に確保されており、それからバスケット１から
離れて軸方向に、軸３に関して外側に拡がっている。各
々の脚６の自由末端は外側に曲ってホック７を形成し、
それは、フィルターバスケットが血管に配置された時血
管壁にわずかに侵入しフィルターバスケラトラ正しい位
置に保つ。脚６は通常針金２と同じまたは類似の物質で
できており、そのため、それは容易に挿入カテーテルの
管腔内に折りたためて適合し、カテーテルから放出され
た場合はね戻って血管壁にかみ合う。
ホック７のすぐ内側の領域での著しいＳ字型の足はフィ
ルターバスケットがカテーテル７通って動く時カテーテ
ル壁に接しているのはホック７よりも滑らかに曲がった
足の部分であろう事を確実にする。
折りたたんだまたは押し縮めた状態のフィルターバスケ
ットにおいて（フェルール４は引キ離すれて、脚６は放
射状に押しつぶされている）全体の構造の直径は針金の
弾力性をそこなう事なく、また脚ンもつれさせる危険を
含む事なくかなり減少する事を理解されたい。拡がった
状態で２５　ｍｍの最大直径を持つバスケットは折りた
たんだ状態では容易にＮｏ、１０Ｆｒｅｎｃｂカテーテ
ルに受は入れられる事が観察された。その結果より簡単
な脈管学操作工程がフィルターの導入に使用できる。
独特のバスケット本体の形および中心面から固定用ホッ
クまでの比較的に長い距離のため、血管に位置した時、
好ましくない傾きに対して高度に安定である。
第２図に例示したフィルターバスケットは一般的に１１
で示され、針金２と同じ針金１２でできておりそれは同
様にその間に狭い引延ばされた隙間をバスケット１１の
表面に持つものと定義される。ガスケット１１の末端で
は、針金１２はフェルール４と同様のフェルール１４に
より互いに連結されているが、この実施態様においては
突き出したはとめ金がないためバスケットＹカテーテル
７通して縦に動かせ、針金１２間で規定される孔中にホ
ックまたは類似のつかむ道具が束縛されなげればならな
い。
第１図の実施態様とさらに異なる点は脚６と同じ構造を
持つ固定用脚１６は末端フェルール１４から分岐せスハ
スケット内部に位置する異なったフェルール１８から分
岐し、フェルール１４と短い棒１９により連結されてい
る。この結果いくぶん全体が短くなったが、その機能は
上記のものと正確に同じである。
第３図はねじれた針金２２がその末端でフェルール２４
にヨリ連結されており、上記のフィルターバスケットと
主に正確に類似して、また同じ一般的な構造を持つ（バ
スケット２１の全体の直径がより小さく、針金２２の数
が少い点を除いて）改良バスケット２１ヲ例示している
。一方大静脈フイルターのフィルターガスケットの最大
直径が例えば１６かた切断図である。
ら２５正であるのに対し、第３図に示したバスケットの
直径は約ｓｍｍである。どのサイズの相異は第１に緩慢
な塞栓に作用するようにバスケット２１が意図されたご
とく異なった使用法を反映している即ち、上で議論した
大静脈より小さい壁腔の血管の閉塞。この目的のためバ
スケット２１の内部は前もって適した塞栓剤を前もって
詰め、続いてバスケラ）Ｙカテーテルに挿入し、次に皮
下で導入しバスケラトラ適した位置に運ぶ。
バスケット２１は脚６または１６と類似の固定化脚なし
で示されたがもし必要なら同様の脚を塞栓バスケット上
に提供する事ができる。
【図面の簡単な説明】
第１図は本発明に用いた大静脈フィルターの正面図でそ
の完全に拡がった状態で示してあり、第２図はわずかに
改良した実施態様の同様の正面図であり、 第３図は本発明に従う塞栓用バスケットの正面図であり
、および

Claims (1)

  1. 【特許請求の範囲】 １、拡がつた弛緩状態においてはバスケッ ト（１）はとがつた末端を持つ孔のあいた引延ばされた
    立体回転体の形と推定され前記末端間で測定したバスケ
    ットの長さは少くともその最大直径と等しい事を特徴と
    する複数の弾力性のある針金（２）が各々の末端で相互
    に連結されている（４）患者の血管内へ導入するのに適
    した折りたたみ式フィルターバスケット。 ２、立体回転体の長さがその最大直径の１．５および３
    倍の間であることを特徴とする特許請求の範囲第１項記
    載のフィルターバスケット。 ３、立体回転体がその軸の標準中央面について対称であ
    ることを特徴とする特許請求の範囲第１または２項記載
    のフィルターバスケット。 ４、孔のあいた立体回転体の母線が滑らかな凝−シヌソ
    イド曲線である事を特徴とする特許請求の範囲第１−３
    項のいずれかの項に記載のフィルターバスケット。 ５、弾力性のある針金（２）が立体回転体の表面上ヘリ
    ックスの形に拡がつており、全ての前記ヘリックスが同
    じ向きである事を特徴とする特許請求の範囲第１−４項
    のいずれかの項に記載のフィルターバスケット。 ６、個々の針金（２）の末端がバスケットの軸（３）に
    関して約９０°空間的に離れている事を特徴とする特許
    請求の範囲第５項記載のフィルターバスケット。 ７、それぞれの脚（６）がホック（７）に隣接してただ
    ちに外側へ著しい曲率でＳ−字型になつている事を特徴
    とし、バスケット（１）の一つの末端でその軸に関して
    一定の角度で外側へ突き出し、その自由末端で、外側へ
    曲つたホック（７）を形成している一連の固定化用脚（
    ６）を特徴とする特許請求の範囲第１−６項のいずれか
    の項に記載のフィルターバスケット。
JP11130285A 1984-05-23 1985-05-23 折りたたみ式フイルタ−バスケツト Granted JPS6141444A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK252984A DK151404C (da) 1984-05-23 1984-05-23 Sammenklappeligt filter til implantation i en patients blodkar
DK2529/84 1984-05-23

Publications (2)

Publication Number Publication Date
JPS6141444A true JPS6141444A (ja) 1986-02-27
JPH0554344B2 JPH0554344B2 (ja) 1993-08-12

Family

ID=8113008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11130285A Granted JPS6141444A (ja) 1984-05-23 1985-05-23 折りたたみ式フイルタ−バスケツト

Country Status (8)

Country Link
US (1) US4619246A (ja)
EP (1) EP0165713B1 (ja)
JP (1) JPS6141444A (ja)
AT (1) ATE54812T1 (ja)
AU (1) AU577377B2 (ja)
CA (1) CA1241581A (ja)
DE (1) DE3578831D1 (ja)
DK (1) DK151404C (ja)

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US4619246A (en) 1986-10-28
DK252984A (da) 1985-11-24
EP0165713A1 (en) 1985-12-27
JPH0554344B2 (ja) 1993-08-12
CA1241581A (en) 1988-09-06
AU4273885A (en) 1985-11-28
ATE54812T1 (de) 1990-08-15
DK252984D0 (da) 1984-05-23
DK151404C (da) 1988-07-18
EP0165713B1 (en) 1990-07-25
DE3578831D1 (de) 1990-08-30
AU577377B2 (en) 1988-09-22

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