JPH0554344B2 - - Google Patents
Info
- Publication number
- JPH0554344B2 JPH0554344B2 JP60111302A JP11130285A JPH0554344B2 JP H0554344 B2 JPH0554344 B2 JP H0554344B2 JP 60111302 A JP60111302 A JP 60111302A JP 11130285 A JP11130285 A JP 11130285A JP H0554344 B2 JPH0554344 B2 JP H0554344B2
- Authority
- JP
- Japan
- Prior art keywords
- basket
- filter basket
- filter
- rotating body
- axis
- 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.)
- Expired - Lifetime
Links
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)
- Public Health (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- External Artificial Organs (AREA)
- Centrifugal Separators (AREA)
- Prostheses (AREA)
- Packages (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
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イルターバスケツト
に関する。
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イルターバスケツト
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
通つて流れる血液中の血栓または栓子を補促して
それらが患者の肺に到達して肺塞栓を起こすのを
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(Kimmel)により1976年
4月27日に出願された米国特許第3952747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イルターに関する技術につ
いて記載されている。
(良好であるのは下部大静脈)に導入し、静脈を
通つて流れる血液中の血栓または栓子を補促して
それらが患者の肺に到達して肺塞栓を起こすのを
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(Kimmel)により1976年
4月27日に出願された米国特許第3952747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イ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(nitinol)と称される
熱形状記憶合金で製作した大静脈フイルターが医
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
あろう拡がつた状態ではフイルターはかなり平た
いかさ様円錐形であり、栓子補促メツシユは個々
の針金により形成される相交わつた複数の環とし
て規定される。冷却したまつすぐにした後比較的
に狭いカテーテルを通してフイルターが運ばれ、
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。
熱形状記憶合金で製作した大静脈フイルターが医
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
あろう拡がつた状態ではフイルターはかなり平た
いかさ様円錐形であり、栓子補促メツシユは個々
の針金により形成される相交わつた複数の環とし
て規定される。冷却したまつすぐにした後比較的
に狭いカテーテルを通してフイルターが運ばれ、
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
ニチノールフイルターの配置の原理はかなり単
純ではあるが、フイルターに関連していくつかの
問題がある。施用に先立つてフイルターを氷冷塩
溶液中にフイルターを保ち、施用操作の間カテー
テルは連続的に氷冷塩溶液を流さなかければなら
ない必要性がある。第一にフイルターが最適に配
置されなかつたりまたは方向が悪くても、体温で
は針金物質は拡がつたフイルターをまつすぐに伸
ばしカテーテルに引き込むのに必要であろう柔軟
性を持つていないので修正がほとんど困難であ
る。
純ではあるが、フイルターに関連していくつかの
問題がある。施用に先立つてフイルターを氷冷塩
溶液中にフイルターを保ち、施用操作の間カテー
テルは連続的に氷冷塩溶液を流さなかければなら
ない必要性がある。第一にフイルターが最適に配
置されなかつたりまたは方向が悪くても、体温で
は針金物質は拡がつたフイルターをまつすぐに伸
ばしカテーテルに引き込むのに必要であろう柔軟
性を持つ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
イルターが遭遇する前記の問題が改善された改良
フイルターバスケツトを提供するのが本発明の目
的である。
と同様に適しており、しかも既知のニチノールフ
イルターが遭遇する前記の問題が改善された改良
フイルターバスケツトを提供するのが本発明の目
的である。
本発明に従うと、バスケツトの末端間の長さが
少なくともバスケツトの最大直径と等しく且つ永
久的又は半永久的に患者の血管内に設置でき、そ
の膨らんだ弛緩状態においてバスケツトは尖つた
末端を有する、孔のあいた引き延ばされた立体回
転体を呈するように、各々の末端で相互に連結さ
れた複数の弾力性のある針金からなる、折りたた
み式フイルターバスケツトであつて、前記弾力性
のある針金は、前記立体回転体の表面上にらせん
形状に拡がり、全てのらせんが同じ方向である。
少なくともバスケツトの最大直径と等しく且つ永
久的又は半永久的に患者の血管内に設置でき、そ
の膨らんだ弛緩状態においてバスケツトは尖つた
末端を有する、孔のあいた引き延ばされた立体回
転体を呈するように、各々の末端で相互に連結さ
れた複数の弾力性のある針金からなる、折りたた
み式フイルターバスケツトであつて、前記弾力性
のある針金は、前記立体回転体の表面上にらせん
形状に拡がり、全てのらせんが同じ方向である。
血管内へ導入された後、上皮の増殖によるフイ
ルターが永久的に静脈壁にとどまつていない間は
(実際的には導入後約1週間まで)、本発明による
フイルターバスケツトはもし必要と考えられたら
わ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。これはフイルターバスケツトの特徴
的な形によりその拡がつた形から比較的大きな力
を加える必要なくまつすぐにできるため可能であ
り、この事はフイルターの施用に使用したカテー
テルにより、カテーテル中へのフイルターを引つ
ぱり戻すかまたはカテーテルをフイルターバスケ
ツトの上に押す事により実施できる。フイルター
を完全に回収するのさえ可能であり、上を参照す
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。フイルターバスケツトは
相対的に安価で容易に加工できる通常の生体医学
用品質のステンレス鋼で作製できる。
ルターが永久的に静脈壁にとどまつていない間は
(実際的には導入後約1週間まで)、本発明による
フイルターバスケツトはもし必要と考えられたら
わ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。これはフイルターバスケツトの特徴
的な形によりその拡がつた形から比較的大きな力
を加える必要なくまつすぐにできるため可能であ
り、この事はフイルターの施用に使用したカテー
テルにより、カテーテル中へのフイルターを引つ
ぱり戻すかまたはカテーテルをフイルターバスケ
ツトの上に押す事により実施できる。フイルター
を完全に回収するのさえ可能であり、上を参照す
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。フイルターバスケツトは
相対的に安価で容易に加工できる通常の生体医学
用品質のステンレス鋼で作製できる。
新規のフイルターバスケツトのさらなる利点
は、事実上バスケツト(最大バスケツト直径のと
ころで)および静脈壁間の接触している円周線上
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。上流フイルター表
面の外部に捕えられた栓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。上流フイルター表面を通る血流に
伴つてバスケツトの内部に到達した栓子は下流フ
イ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。フイ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り大
きな栓子の塊が形成されるのみがみられるであろ
う。
は、事実上バスケツト(最大バスケツト直径のと
ころで)および静脈壁間の接触している円周線上
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。上流フイルター表
面の外部に捕えられた栓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。上流フイルター表面を通る血流に
伴つてバスケツトの内部に到達した栓子は下流フ
イ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。フイ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り大
きな栓子の塊が形成されるのみがみられるであろ
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。
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。
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)でできた複数の
細い弾力性のある針金2でできた大静脈フイルタ
ーを例示している。図1に例示したごとく、バス
ケツト1は一般的に第1図の点―ダツシユ線3に
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。各々のバスケツト本体の末端で、針金は短い
フエルール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を固定する。
好であるのはステンレス鋼合金)でできた複数の
細い弾力性のある針金2でできた大静脈フイルタ
ーを例示している。図1に例示したごとく、バス
ケツト1は一般的に第1図の点―ダツシユ線3に
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。各々のバスケツト本体の末端で、針金は短い
フエルール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を固定する。
第1図に示したごとく、バスケツト長のその最
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。この
比の正確な値はフイルターバスケツトに依存して
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)である事を理解されたい。
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。この
比の正確な値はフイルターバスケツトに依存して
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)であ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
フエノール4の間各々の針金2はヘリツクス様曲
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”を持つている。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。
フエノール4の間各々の針金2はヘリツクス様曲
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”を持つている。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
のはとめ金が各々のフイルター4に確保されてお
り、バスケツト1の軸にそつて突き出している。
はとめ金5およびめあつたホツクまたはその他の
ものにより、挿入針金の末端で装置がしつかりと
つかまれ、折りたたみ式フイルターバスケツトは
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)。
のはとめ金が各々のフイルター4に確保されてお
り、バスケツト1の軸にそつて突き出している。
はとめ金5およびめあつたホツクまたはその他の
ものにより、挿入針金の末端で装置がしつかりと
つかまれ、折りたたみ式フイルターバスケツトは
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
のフエルール4に確保されており、 それからバ
スケツト1から離れて軸方向に、軸3に関して外
側に拡がつている。各々の脚6の自由末端は外側
に曲つてホツク7を形成し、それは、フイルター
バスケツトが血管に配置された時血管壁にわずか
に侵入しフイルターバスケツトを正しい位置に保
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
テルの管腔後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つて血管壁にかみ合
う。ホツクス7のすぐ内側の領域での著しいS字
型の足はフイルターバスケツトがカテーテルを通
つて動く時カテーテル壁に接しているのはホツク
7よりも滑らかに曲がつた足の部分であろう事を
確実にする。
のフエルール4に確保されており、 それからバ
スケツト1から離れて軸方向に、軸3に関して外
側に拡がつている。各々の脚6の自由末端は外側
に曲つてホツク7を形成し、それは、フイルター
バスケツトが血管に配置された時血管壁にわずか
に侵入しフイルターバスケツトを正しい位置に保
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
テルの管腔後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つて血管壁にかみ合
う。ホツクス7のすぐ内側の領域での著しいS字
型の足はフイルターバスケツトがカテーテルを通
つて動く時カテーテル壁に接しているのはホツク
7よりも滑らかに曲がつ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イルタ
ーバスケツトにおいて(フエルール4は引き離さ
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、
また脚を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。拡がつた状態で25mmの
最大直径を持つバスケツトは折りたたんだ状態で
は容易にNo.10Frenchカテーテルに受け入れられ
る事が観察された。その結果より簡単な脈管学操
作工程がフイルターの導入に使用できる。
ーバスケツトにおいて(フエルール4は引き離さ
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、
また脚を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。拡がつた状態で25mmの
最大直径を持つバスケツトは折りたたんだ状態で
は容易にNo.10Frenchカテーテルに受け入れられ
る事が観察された。その結果より簡単な脈管学操
作工程がフイルターの導入に使用できる。
独特のバスケツト本体の形および中心面から固
定用ホツ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。
定用ホツ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図に例示したフイルターバスケツトは一般
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
間をバスケツト11の表面に持つものと定義され
る。バスケツト11の末端では、針金12はフエ
ルール4と同様のフエルール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ツトをカテーテル
を通して縦に動かせ、針金12間で規定される孔
中にホツクまたは類似のつかむ道具が束縛されな
ければならない。
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
間をバスケツト11の表面に持つものと定義され
る。バスケツト11の末端では、針金12はフエ
ルール4と同様のフエルール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ツトをカテーテル
を通して縦に動かせ、針金12間で規定される孔
中にホツクまたは類似のつかむ道具が束縛されな
ければならない。
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は末端フエルール14
から分岐せずバスケツト内部に位置する異なつた
フエルール18から分岐し、フエルール14と短
い棒19により連結されている。この結果いくぶ
ん全体が短くなつたが、その機能は上記のものと
正確に同じである。
じ構造を持つ固定用脚16は末端フエルール14
から分岐せずバスケツト内部に位置する異なつた
フエルール18から分岐し、フエルール14と短
い棒19により連結されている。この結果いくぶ
ん全体が短くなつたが、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がその末端でフエル
ール24により連結されており、上記のフイルタ
ーバスケツトと主に正確に類似して、また同じ一
般的な構造を持つ(バスケツト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)
改良バスケツト21を例示している。一方大静脈
フイルターのフイルターバスケツトの最大直径が
例えば16から25mmであるのに対し、第3図に示し
たバスケツトの直径は約8mmである。このサイズ
の相異は第1に緩慢な塞栓に作用するようにバス
ケツト21が意図されたごとく異なつた使用法を
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。ここの目的のためバスケツ
ト21の内部は前もつて適した塞栓剤を前もつて
詰め、続いてバスケツトをカテーテルに挿入し、
次に皮下で導入しバスケツトを適した位置に運
ぶ。
ール24により連結されており、上記のフイルタ
ーバスケツトと主に正確に類似して、また同じ一
般的な構造を持つ(バスケツト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)
改良バスケツト21を例示している。一方大静脈
フイルターのフイルターバスケツトの最大直径が
例えば16から25mmであるのに対し、第3図に示し
たバスケツトの直径は約8mmである。このサイズ
の相異は第1に緩慢な塞栓に作用するようにバス
ケツト21が意図されたごとく異なつた使用法を
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。ここの目的のためバスケツ
ト21の内部は前もつて適した塞栓剤を前もつて
詰め、続いてバスケツトをカテーテルに挿入し、
次に皮下で導入しバスケツトを適した位置に運
ぶ。
バスケツト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
栓バスケツト上に提供する事ができる。
化脚なしで示されたがもし必要なら同様の脚を塞
栓バスケツト上に提供する事ができる。
第1図は本発明に用いた大静脈フイルターの正
面図でその完全に拡がつ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ツト
の正面図であり、および第4図は第1図の4―4
の線に沿つた拡大された切断図である。
面図でその完全に拡がつ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ツト
の正面図であり、および第4図は第1図の4―4
の線に沿つた拡大された切断図である。
Claims (1)
- 【特許請求の範囲】 1 バスケツトの末端間の長さが少なくともバス
ケツトの最大径と等しく且つ永久的又は半永久的
に患者の血管内に設置でき、その膨らんだ弛緩状
態においてバスケツトは尖つた末端を有する、孔
のあいた引き延ばされた立体回転体を呈するよう
に、各々の末端で相互に連結4された複数の弾力
性のある針計2からなる、折りたたみ式フイルタ
ーバスケツトにおいて、 前記弾力性のある針金2は、前記立体回転体の
表面上にらせん形状に拡がり、全てのらせんが同
じ方向であることを特徴とする折りたたみ式フイ
ルターバスケツト。 2 前記バスケツトの長さがその最大直径の1.5
倍と3倍の間であることを特徴とする特許請求の
範囲第1項記載の折りたたみ式フイルターバスケ
ツト。 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
又は2記載の折りたたみ式フイルターバスケツ
ト。 4 前記孔にあいた立体回転体の母線が滑らかな
擬シヌソイド曲線であることを特徴とする特許請
求の範囲第1乃至3項のいずれかに記載の折りた
たみ式フイルターバスケツト。 5 各針金2の末端がバスケツトの軸3に関して
約90゜空間的に離れていることを特徴とする特許
請求の範囲第1項記載の折りたたみ式フイルター
バスケツト。 6 各脚6がホツク7に隣接してただちに外側へ
著しい曲率でS字型になり、前記バスケツトの一
つの末端でその軸3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がつたホツク
7を形成している一連の固定化用脚6を含んだこ
とを特徴とする特許請求の範囲第1乃至5項のい
ずれかに記載の折りたたみ式フイルターバスケツ
ト。
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 JPS6141444A (ja) | 1986-02-27 |
| JPH0554344B2 true 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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| US2281448A (en) * | 1941-09-17 | 1942-04-28 | Scully Signal Co | Device for partially obstructing pipes |
| US3334629A (en) * | 1964-11-09 | 1967-08-08 | Bertram D Cohn | Occlusive device for inferior vena cava |
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| JPS5315190U (ja) * | 1976-07-20 | 1978-02-08 | ||
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| DD158084A1 (de) * | 1981-05-08 | 1982-12-29 | Joachim Heinke | Verschlusskoerper und verfahren zu seiner herstellung |
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| US4494531A (en) * | 1982-12-06 | 1985-01-22 | Cook, Incorporated | Expandable blood clot filter |
-
1984
- 1984-05-23 DK DK252984A patent/DK151404C/da not_active IP Right Cessation
-
1985
- 1985-05-20 AT AT85303541T patent/ATE54812T1/de not_active IP Right Cessation
- 1985-05-20 EP EP85303541A patent/EP0165713B1/en not_active Expired - Lifetime
- 1985-05-20 US US06/736,147 patent/US4619246A/en not_active Expired - Fee Related
- 1985-05-20 DE DE8585303541T patent/DE3578831D1/de not_active Expired - Lifetime
- 1985-05-22 CA CA000482028A patent/CA1241581A/en not_active Expired
- 1985-05-22 AU AU42738/85A patent/AU577377B2/en not_active Ceased
- 1985-05-23 JP JP11130285A patent/JPS6141444A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| CA1241581A (en) | 1988-09-06 |
| DE3578831D1 (de) | 1990-08-30 |
| DK151404C (da) | 1988-07-18 |
| DK151404B (da) | 1987-11-30 |
| ATE54812T1 (de) | 1990-08-15 |
| EP0165713A1 (en) | 1985-12-27 |
| US4619246A (en) | 1986-10-28 |
| JPS6141444A (ja) | 1986-02-27 |
| AU577377B2 (en) | 1988-09-22 |
| EP0165713B1 (en) | 1990-07-25 |
| DK252984D0 (da) | 1984-05-23 |
| DK252984A (da) | 1985-11-24 |
| AU4273885A (en) | 1985-11-28 |
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