JPS59500652A - 伸縮可能な管状本体を備えた人工器官 - Google Patents
伸縮可能な管状本体を備えた人工器官Info
- Publication number
- JPS59500652A JPS59500652A JP58501556A JP50155683A JPS59500652A JP S59500652 A JPS59500652 A JP S59500652A JP 58501556 A JP58501556 A JP 58501556A JP 50155683 A JP50155683 A JP 50155683A JP S59500652 A JPS59500652 A JP S59500652A
- Authority
- JP
- Japan
- Prior art keywords
- tubular body
- prosthesis
- elements
- diameter
- tube
- 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
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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- 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
- A61F2/0105—Open ended, i.e. legs gathered only at one side
-
- 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
- A61F2/011—Instruments for their placement or removal
-
- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
-
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
- D04C1/06—Braid or lace serving particular purposes
-
- 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
- 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
- A61F2002/018—Filters implantable into blood vessels made from tubes or sheets of material, e.g. by etching or laser-cutting
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0008—Fixation appliances for connecting prostheses to the body
-
- 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
- A61F2230/0069—Three-dimensional shapes cylindrical
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】
発明の名称
伸縮可能な管状本体を備えた人工器官
技術分野
本発明は生きている動物せたは生きている人間の体の例えば血管またはある接近
し難い個所の一部分の内部に適用しまたはその一部分と置き換えることができる
人工器官に関する。この人工器官は可撓性の管状本体を備えており、その管状本
体の直径は増減することができるように在っている。本発明は血管、気管または
それらに類似の部分のだめの拡張自動固定人工器官により機械的な継体内管路的
移植のために特に有用である。本発明の装置により、損傷した血管またはその他
の器官の内壁は人工組織により内張すすることができる。
外科手術およびその他の医療技術においては、所定位置に残すことができる管寸
たは道(トラクト)を支持することを機能とする例えば血管、尿路ま′たはその
他の接近し難い個所に装置を挿入して拡張することが屡々必要である。
本発明による装置は寸だ多ぐの医療に使用することができ、そしてその例として
は、ある形態の管の拡開によりもたらされる異なる型式の動脈瘤またはその反対
に血管の収縮を伴なう狭窄症への使用を挙けることができる。
従って、本発明はさらに特定的には静脈組織の管を支持かつ開いた状態に保持し
、病理学的な管の破壊部分を閉じ、内部の管壁の病理学的な肥大症および破裂部
分を橋絡しまたは気管支を安定化させるために使用することができる。本発明に
よる装置はまた例えば肺塞栓症を防止するために工大静脈に適用することにより
崩栓症のフィルタとして作用するように設計することができる。本発明は体内の
血管またはその他の管状組織の中に適用するだめの例えばグラフトのような人工
器官として特に好適に使用される。しかしながら、本発明が上述した用途に限定
されるものではなく、前述した用途は単に適用例として考えなければならないこ
とを考慮すべきである。
背景技術
米国特許第3,868,956号明細書には、例えば血管の中に挿入後に拡張可
能な装置が記載されている。この装置の作用部分はいわゆる「記憶機能」を有す
る金属合金、すなわち加熱されたときにその初期の形状にもどる材料を使用する
ことに基づいている。この先行技術においては、この材料の加熱は電気加熱によ
り行なわれ、装置は関係部分に挿入される。しかしながら、この既知の技術は電
気抵抗による加熱が加熱中に損傷されることがありうる周相の感受性の高い組織
に関連して起らなければならないという基本的な不利点を有している。この米国
特許明細書(第3欄第42〜48行参照)には血管中に装置を挿入するときに患
者の面液が冷却媒体として作用することが述べであることは事実である。しかし
ながら、面液はまた加熱されたときに望ましくない凝固を生ずる感熱性物質であ
る。
発明の要約
本発明の目的は既知の技術の欠点をカクシた半径方向に伸縮可能な人工器官を提
供することである。
本発明は可撓性の管状本体を備え、該管状本体の直径を該管状の端部を相互に相
対して軸線方向に移動することにより変更できる人工器官を使用することに基づ
いている。好ましい一実施態様においては管状本体はそれ自体で半径方向に拡張
した位置を占める。管状本体が無負荷状態に保たれたとき、半径方向の外方は全
く作用しない。この管状本体は複数個の個々の剛性のしがも可撓性のスレッド(
thread )要素からなり、前記スレッド要素の各々は共通軸線としての管
状本体の中心線に関して螺旋形に延びている。複数藺の要素が同じ方向に巻かれ
しかも軸線方向に互いに相対して変位せしめられている。
前記数の同じ方向に巻かれた要素は同様に軸線方向に互いに変位せしめられてお
りしかも反対方向1(巻かれた複数個のスレッド要素を横切るときに出会う。
所望の機能を得るために、交叉要素間の軸線方向に向いた角度は好適には約60
’よりも犬きく、そして、鈍角、すなわち約900よりも大きいことが好ましい
。管状本体のこの状態は半径方向に負荷されていない状態を、さしでいる。
交叉スレッド要素を1種の編組された形態に形成するように配置することが好ま
しく、その編組された形態は所n通りに変更てきそして例えば平織りの原理によ
るある既知の織り方を模倣することができる。このように構成する目的は管状本
体に必要な安定性を与えることである。仮りに可撓性の管状本体の要素の数をn
とすると、nを約10からそれよりも大きい数、例えば約5oまでの範囲内で変
更することが好捷しい。管状本体の要素は対称に配置され、すなわち各々の巻き
の方向の要素の数をヲとすることが好ましい。これに関連して、管状本体の要素
の数については、常に管状本体の支持作用を維持するようになった要素が得られ
るようにしなければならないことを考慮すべきである。要素の数nは管状本体の
直径、要素の直径、要素の材料またはその他の因子により選択される。極めて一
般的に述べると、所定の要素材料で構成された管状本体の直径が大きくなる程、
管状本体の必要な安定性を与えるためにより多数の要素を使用すべきである。
本発明による可撓性管状本体は生体の面管捷たは同様々器官の継体内管路的移植
のための人工器官として使用するために極めて適していることが判明した。この
管状本体は組織の中の所定位置に収縮状態、すなわち直径を減少させた状態で挿
入される。本発明による管状本体は所定位置に挿入された後に拡張され、そして
負荷されていない状態での管状本体の直径が囲繞壁部の直径よりも若干大きく選
択されていれば自動固定により所定位置に拡張状態に維持することができる。そ
の結果、内壁部に対して所定の恒久的な係合圧力が作用して良好な固定状態が確
実に得られる。
この移植方法は非拡張人工器官を使用する既知の移植技術よりも極めて簡単であ
りしかもリスクが少々い。例えば移植部位から所定距離において血管の壁部を通
して挿入された半径方向に収縮した人工器官が従来性われてきた置き換えられる
器官の部分の除去を必要としないで固定される。このようにして、面液の流れは
短い時間を必要とする移植の間ですらも維持することができる。この人工器官は
血管に縫合する必要がなく、そして挿入してから数日経過後この人工器官は自然
の組織の成長により体に固定され、そして数ケ月経過後、組織の成長が完了し、
その結果、人工器官の内壁部は新しい自然の組織により蔽われる。
との可撓性管状本体はいくつ、かの方法で半径方向に拡張させることができる。
多くの理由から、管状本体が単独で半径方向に拡張しかつ負荷されていない状態
で入る性質を有していることが好ましいことが判明した。管状本体の拡張状態は
スレッド要素の固有の剛性により左右されるが、生体のマントル面に関連して配
置されかつ該マントル面に沿って軸線方向に延びる弾性ストリング、パン1寸た
け膜により制御することも可能である。これらのストリング、バンドまたは膜は
それらの弾性により管状本体を軸線方向に牽引し、すなわち管状本体を拡張状態
に保つ。
管状本体に該本体が半径方向に拡張した位置を占める傾向を生ずる性質を与える
別の方法は要素を交叉位置において好適な態様、例えばある型式の溶接、にかわ
による接着またはそれらに類似の方法で相互に取りつけることである。
可撓性の管状本体を形成する要素は薬学的に認容しうる物質例えばプラスチック
または金属で製造すべきであり、そしてこれらの要素は好適な弾性とともに所定
の弾力または剛性を保持すべきである。これらの要素は単繊維(モノフィラメン
ト)例えばポリプロピレン、ダクロンまたはその他の好適なプラスチックで構成
するかまたは複合材料で構成することができる。これらの要素はまたある好適々
薬学的に認容しうる金属例えばスチールから製造することができる。
管状本体のスレッド要素の自由端部はいくつかの方法で改造しまたは保護するこ
とができる。自由端部が全くない別の態様は管状本体全体を一つの凝集性要素と
して構成する別の方法である。これと最も密接に関連する別の態様は長いストリ
ングを切断することにより得られた管状本体の自由端部が好適な態様、例えば熱
溶接、にかわによる接着またはそれらと同様な方法により対をなして要素の端部
に取りつけられたU字形部材に連結される場合である。このようにして1.同じ
巻き方向、の要素または反対の巻き方向の要素を互いに2個づつ取りつけるここ
れらの実施態様に代わる実施態様はストリング切断前に材料のまわりのリングの
中の交叉点を一緒に溶接し、その後溶接部位に隣接ししかも該溶接部位の外側で
切断することである。そのときに溶接領域の外側に延びる端部は例えば制御され
た加熱によりゾラスチッ、りを軽度に変形させることにより管状本体の内部に向
かって内方に折りたたむことができる。さらに別の方法はスレッド要素の自由端
部を曲げてループを形成することからなっている。
前述したように、本発明による管状本体はいわゆるグラフトとして使用するため
に好適である。この場合には、管状本体はグラフトとしての機能を発揮すること
ができる。すなわち、もしも管状本体がそれら自体により所望の密度および多孔
性を与えるような性状の要素で構成されていれば、管状本体がグラフトとしての
機能を発揮しそれにより複数の要素を重合絨維(ポリフィラメント)物質または
それと同様な物質で構成することができる。
所望の密度を管状本体に与える要素自体の別の態様は管状本体にある種類の表面
層、例えばプラスチックまたはその他の好適な材料の表面層を適用することであ
る。交叉点はこのような表面層を適用することにより前述したように同時に固定
して管状本体が拡張位置を占める傾向を生ずるようにすることができる。
別個のスリープまたは膜を管状本体の外側または内側にまたは該管状本体と合体
して配置することもできる。
(8)
これは管状本体と一緒に移植可能々管状本体を囲繞する多孔性ウェブのストッキ
ングにより構成することができる。この場合には、ストッキングはウェブの伸縮
性により捷たは重なり合うように折りたたむことによりまたは別の方法、例えば
複数個のスレッド要素からの管状本体と同じ原理により構成されることにより管
状本体に対して該管状本体の拡張とともに調節可能でちる。また、ある形態のト
リコット型製品または巻縮繊維織物の使用を考えることもできる。このような別
の部材を使用する場合、大きい管路またはそ九と同様な部分に適用するときにこ
の別個の部材を正しい位置に終端するように管状本体に対して軸線方向に固定す
ることが好ましい。
管状本体の伸縮は該管状本体を延長しまたは短縮するようになった手段を備えた
装置により行うことができる。
このような手段は多数の方法で設計することができ、例えば管状本体の両端部を
互いに軸線方向に移動させてその直径を増減でき、るように構成することができ
る。この装置は管状本体の両端部を把持しかつ該両端部を互いに軸線方向に移動
しうる把持部材を備えるべきである。これらの把持部材は管状本体を所望の部位
に適用した後に釈放しうるように構成してそれにより管状本体を除いた装置を前
記部位から取り外すことができるようにすべきである。またこの装置は、別の態
様として、内部に管状本体を収縮状態で配置するように構成された可撓性チュー
ブと、拡張状態の管状本体を所望の部位に適用するように押し出すことができる
作動部材とを備えることができる。
その他の特徴は添付した請求の範囲から明らかである。
以下に本発明を添付図面に関連して実施態様により説明する。ただし、本発明は
これらの実施態様に限定されるものではない。これらの実施態様は添付図面に例
示しである。
第1A図および第1B図は本発明にょる可撓性管状本体の側面図および端面図を
それぞれ図解的に示し、第2A図および第2B図は第1図に示したのと同一の管
状本体を収縮状態で示し、第5図および第4図は管状本体の1個の分離したヌレ
ラド部材を示し、管状本体はそれぞれ収縮状態、拡張状態で示してあり、第5図
は本発明による管状本体を組みこんだ集成体を図解的に示し、第6図は第5図の
集成体の一部分を拡大図で示し、第7図は管状本体の別の実施態様を示し、第8
図は組み合わされたグラフトおよびフィルタとして設計された管状本体を示し、
第9図は動脈瘤に結合したクラフトとじて使用された管状本体を示し、第10図
は人工器官の角度αおよびチで示した伸びの関数としての管状本体の直径(D)
の線図を示し、第11図は本発明の人工器官を操作するだめの別の集成体を図解
的に示している。
第1A図および第1B図には、全体を符号1で示した円筒形の管状本体の形態の
人工器官の一例を示しである。
第1A図から明らかなように、管状本体1のマントル表面は複数個の個々のスレ
ッド要素2,3等または2a、3a等により形成されている。これらの要素のう
ち、要素2゜3等は管状本体1の中心線7を共通の軸線として有する相互に軸線
方向に変位した螺旋形に延びている。その他の要素2a、3aは反対の方向に螺
旋形に延び、従って要素2.3.2a、3aは第1A図に示したように互いに交
叉した二つの方向に延びている。
このように構成された管、状本体の直径は管状本体の両端部を中心線7の方向に
互いに軸線方向に変位させれば変更することができる。第2A図には、第1A図
による管状本体1の直径がその両端部8,9を矢印の方向に互い−に離れるよう
に移動させることにより減少せしめられる態様を例示しである。第1B図は拡張
状態にある管状本体の直径を示し、一方第2B図は端部8,9を互いに離れるよ
うに移動させた後の収縮状態の管状本体1の直径を示している。
第5図および第4図は第・1図および第2図に示しだ部材の細部を示し、さらに
詳しく述べると、管状本体1の単一のスレッド要素を示しかつ管状本体1の螺旋
形がその長さの変化とともに変化する態様を示している。
第3図には、第2A図の要素10に相当する個々の要素10を示しである。つる
巻線の直径はdlであり、また要素の長さは21である。第4図には、管状本体
が第1A図に示した状態に拡張せしめられた後の同一要素10.を示しである。
つる巻線の直径はこの場合には増大し、そして符号d2で示してあり、一方長さ
は減少し、そして符号p2で示しである。
管状本体1はいくつかの方法で拡張させることができる。前述したように、管状
本体が本来負荷されていない状態で単独で拡張位置を占める性質を有しているこ
とが好寸しい。この明細書では、「拡張位置」なる用語は常に半径方向の拡張、
す々わち管状本体1の直径が大きい状態を示している。自己拡張性は管状本体に
そのマントル表面に平行にかつ軸線方向に延びるノドリングまたはバンドを設け
ることによって得られる。このような実施態様の一例を第7図に示してあり、管
状本体1が軸線方向のストリングまたはバンド11を備えている。これらのスト
リングまたはバンド11は弾性材料で好適に構成され、そしてこれらのストリン
グ、すなわち、バンドは管状本体1の要素に好適な態様でしかも管状本体が拡張
した状態にあるときに固定される。さて、もしも管状本体1がその両端部を互い
に離れるように移動することにより軸線方向に伸長せしめられると、弾性ストリ
ングまたはバンド11が伸長せしめられる。管状本体1から張力を除去すると、
弾性ストリングまたはバンド11が管状本体1を軸線方向に圧縮し、その結果、
管状本体1の直径がそれに対応して増大する。
管状本体1には、前述したように、交叉点5,6(第1図)において要素2,3
等および2a 、 3a等を固定することにより拡張位置を占める同じ傾向を付
与するととができる、この作用を与える別の方法は管状本体の少くとも両端部に
取りつけられる例えば薄い弾性体からなる内側または外側の管状弾性部材を設け
ることである。
第5図には、例えば血管の所望された部位において管状本体20を収縮状態およ
び拡張状態で挿入可能にするだめの全体を符号18で示した装置を例示しである
。管状本体20は装置18の前側管状部分19を囲繞しかつその両端部が把持装
置21および22に取りつけられている。装置18の前側管状部分19は可撓性
の管状装置23を介して作動部材24に連結されている。把持装置21および2
2は作動部材24の作動要素25 、26および27によね所望の態様に制御す
ることができる。
第5図には、管状本体20が収縮状態にある装置18を例えばダッシュ線28で
示した血管の中に挿入する態様を図解的に示しである。作動装置26が点ダッシ
ュ線で示した位置2?まで前方に移動せしめられるときに把持部材22がそれに
対応して点ダッシュ線30で示した位置30捷で変位せしめられるように作動部
材24が把持部材22に連結されている。その結果、管状本体2[]の端部は位
置22から位置60に移動せしめられる。一方、この場合には管状本体20の他
方の端部は位置21に保持されている。同時に、管状本体20の直径が増大し、
そしてその端部が位置30に到達したとき罠、管状本体20が拡張せしめられて
血管の内壁と接触し、点ダッシュ線で示した位置61を占める。管状本体20の
両端部は依然として部材21.22により保持されているので、拡張状態の管状
本体20は風船のような形状になる。
作動部材27も寸た例えば管状部材23の中に延びるワイヤの一部分により把持
部材22に連結されている。
このようにして、位置60における把持部材22を作動部材の軸線方向の変位に
より操作して管状本体2oの端部を釈放することができる。同様に、把持部材2
1に連結された操作部材25は該操作部材を軸線方向に変位させることにより管
状本体20の前端部を把持部材21から釈放させることができる。それにより、
弾性体20の両端は直ちに互いに相対する方向に一移動せしめられて拡張し、そ
して人工器官は血管の内部で拡張した円筒形の形状になる。
第6図には、装置18の前側管状部分19の構造をさらに詳細にそして拡大して
示しである。管状本体2oの両端部32および63は外側の可撓性チューブ65
の内側に同心状に延びる薄い壁部を有する可撓性のチューブ64を囲繞している
。これらの2個のチューブ34.35は第5図において管状部材23を形成して
いる。内側チューブ64の前部には、環状部材66が配置されている。
環状部材36の中には、チューブ20の端部62が配置されている。チューブ2
0の端部63は同様に環状部材37の中に挿入されている。環状部材67は該環
状部材、すなわち、リングにより囲繞されたチューブ34に対して軸線方向に変
位することができる。チューブ34の前部には、内側把持部材、すなわち、ラッ
チ38が設ゆられている。ばね鋼で好適に構成されたラッチ38はほぼ直角に曲
けられた尖った前部39を有している。この前部39はチューブの壁部34の穴
を通して半径方向に外方に延びている。前部69はリング4oにより半径方向に
移動することができる。リング4oは軸線方向に移動できかつチューブ34の内
側に配置されている。リング30はワイヤ41に連結されている。ワイヤ41を
軸線方向に変位することによりラッチ68を半径方向に移動することができる。
第゛6図には、ランチ68はその尖った端部39が管状本体20の端部32を貫
通しかつ前記端部62を所定位置に維持するような位置で示しである。
別のラッチ42が同様な態様で管状本体2oの端部36をその尖った端部43に
より外側から保持するために配置されている。チューブ65の外側に取りつけら
れたこのラッチ42はリング44により半径方向に移動することができる。リン
グ44・はチューブ35のまわりに配置されかつチューブ34および35の間に
延びるケーブル45に取りつけられている。第5図においては、ケーブル44お
よび45は作動装置25および27のそれぞれに連結されている。
取りつけられかつ軸線方向に延びた管状本体20が半径方向に拡張した後に装置
の残りの部分から釈放されるときに、この管状本体の釈放は作動部材25および
27を介してケーブル41および45を経てリング40および44を作動させて
ラッチ38および42をそらせることにより管状本体2oの両端部からラッチ6
8および42の尖った部分39.43を釈放することによって起る。そのとき、
管状本体20の端部32および33は装置の管状部分19の軸線方向の変位によ
り釈放される。第6図から明らかであるように、装置の前端部はリング36に取
りつけられたボスすなわちケーシング46により保護される。
前述したように、この拡張しうる管状本体は外科手術においていくつかの用途に
使用される。例えば第1図に示した実施態様では、管状本体は血管等の壁部を支
持するために利用することができる。第8図には可撓性の管状本体の変型実施態
様を示してざる。この実施態様においては、管状本体は円筒形の円形部分56か
らなっている。円形部分53はその一端部において変化して同様にスレッド要素
から構成された先細部分すなわち端部43に終端している。この装置は面枠症を
防止するだめのふるいまたはフィルタとして使用するために好適であることが判
明した。第8図に示した装置は肺の細胞層の陥入を防止する目的のために血管、
例えば工大静脈の内部の所望の位置に適用することができる。面枠症を把、持す
る目的のために血管の内部に適用するようになった従来知られているフィルタ装
置は尖った端部寸たはラッチまたはそれと同様な部材により血管内に恒久的に取
りつけられ、フィルタの位置の修正または除去が不可能であるという不利点を有
している。このような装置の一例は米国特許第3,540,415号明細書に記
載されている。本発明による装置は非常に高い精度で大静脈の中に挿入すると−
どができ、そして今日同じ目的のために外科手術に使用されている既知の装置の
場合のように囲繞する血管等の壁部を損傷する危険を々んら伴わない。
第9図には、グラフトとして使用するだめの本発明による管状本体を示しである
。この場合には、管状本体55は第1図および第2図に示した実施態様よりも緻
密な壁部を有している。この緻密な壁部は第1図の支持スレッド要素2,3等、
2a、3a等の間に弾性ヤーンを織りこむことにより得られる。このようにして
、多孔性が制御された壁部が得られる。この多少とも多孔性の壁部を有する管状
本体は一種の拡張性グラフトでおり、そして種々の用途に使用される。
第9図に示した用途においては、管状本体55が血管の壁の広がりの形態の動脈
瘤がある大動脈56の中に移植される。拡張しうる本体すなわちグラフト55を
大動脈の損傷部位から所定の距離に挿入され、次いで動脈瘤の真中に配置するこ
とができるという事実から、動脈瘤が橋絡され、従って動脈瘤を手術により除去
する必要が力い。第9図では、大動脈が円錐形の血管であることを示している。
それ故に、この場合の手順はグラフトの形態の人工器官が器具により例えば第5
図に従って挿入されることである。グラフトす々゛゛わち本体55は所定位置に
配置された後に拡張せしめられる。大動脈が円錐形であることから、外科手術の
技術は次の通りである。
第5図によるグラフト55の前端部31が大動脈の中に終端操作後に占める位置
よりも若干奥の方に挿入される。この位置59は第9図に点ダッシュ線で示しで
ある。
第5図による軸線方向に延びたグラフト55の他方の端部22は半径方向の拡張
前に第9図の位置60に相当する最終位置に配置される。大動脈のこの部分はそ
の上流側に見られるような動脈瘤の前方の部分の直径よりも若干小さいので、人
工器官は端部60の直径に合致した寸法よりも大きく拡張することはできない。
しかしながら、これは器具の前部によりグラフト55の他方の端部を位置59か
ら位置58に移動してそれKよりグラフトのこの端部を十分に拡張させて血管壁
のこの部分と係合させることにより緩和される。
第11図には、管状本体を拡張するために使用される集成体の別の実施態様を示
しである。
この集成体は収縮した状態の管状本体を例えば血管の中に挿入し、次いで管状本
体を血管の中に配置されたときに拡張させるようになった可撓性の器具を構成し
ている。器具の構成部分は外側の可撓性チューブ61と、同心状に配置された同
様に可撓性の内側チューブ62とからなっている。外側チューブ61の一方の端
部には、作動部材63が配置されている。内側チューブ62の自由0樽
端部には、別の作動部材64が取りつけられている。このように構成することに
より、内側チューブ62は外側チューブ61に対して軸線方向に変位させること
ができる。内側チューブ62の他方の端部には、ピストン65が取りつけられて
いる。ピストン65は移動時に外側チューブ61の内壁部に沿って走行する。
この器具を使用するとき、収縮状態の管状の拡張しうる本体69が先づチューブ
61の中に配置され、そして内側チューブ62がピストン65と共に外側チュー
ブ61の後側部分66の中に配置される。ピストン65の出発位置は第11図に
ダッシュ線で示しである。このようにして、出発位置において、チューブ61の
部分に収縮した管状本体69が充填される。
移植中、この装置の可撓性管状部分が移植を行うように意図された血管の部位に
挿入される。次いで部材64が矢印68で示した方向に移動され、収縮した管状
本体69がチューブ61の端部70を通して押し出され、端部70から出た管状
本体69の部分が拡張位置71を占めるまで拡張しそれにより管状本体69が血
管壁72の内側と係合せしめられる。第11図では、管状本体69゜71は筒単
に図示するために二つの静脈洞形の線として示しである。拡張した本体21が血
管壁72と係合する範囲まで、部材63を矢印76の方向に移動させることによ
りチューブの端部70が移動せしめられる。収縮した管状本体69は該管状本体
の一端部を押圧するピストン65に19移動せしめられる。このようにして、移
植は部材64および66を同時に反対の方向に移動させることによって行われる
。この場合、部材64の変位は部材66の変位よりも大きくする。収縮した本体
69がチューブ61から十分に取り出されたときに拡張が終了し、そして器具を
操作位置から除去することができる。
第11図による実施態様は構造の細部が極めて簡単でありかつ高い信頼度で操作
できるという大きな利点を有している。図示の器具はまた非常に小さい直径を有
するらせん形部材を移植するために好適である。−例として、交叉したスレッド
要素からなる管状の拡張しうる本体により実験を行なった処、管状本体の収縮時
の直径が僅が2vtmでありそして拡張時の直径が6門であったことを述べるこ
とができる。また、より小さい直径の拡張した本体を移植することも十分に考え
られる。第11図による器具はまた非常に大きい直径を有す宕グラフトの形態の
管状本体を移植するために有利に使用することができる。
長い本体を移植する場合には、チューブ61の中の本体の変位に対する抵抗が大
きくなり過ぎることが考えられる。この場合には、チューブ65の前端部におけ
るピストン65を可動ンヨー寸たはラッチで移動することが好適であるかもしれ
々い。可動ジョーまたはラッチはチューブ62が矢印68の方向に前方に移動せ
しめられるときに管状本体69の内側と係合して管状本体を前方に移動させるよ
うに作動する。チューブ62が矢印73の方向に後方に移動せしめられるときに
ラッチが釈放される。このようにして、管状本体69はチューブのポンプのよう
々作動により前方に移動させることができる。
勿論第11図に示した異なる部材の多くの実施態様も考えられる。従って、例え
ば外科医にとっては部材66および64の間の相対運動を機械的に制御すること
により移植を簡単にすることができる。
移植において成功を収めることができるようにするために拡張しうる管状本体が
ある弾性を有することが絶対に必要である。例えば管状本体が血管を開いた状態
に保つために挿入されるかまたは血管の人工器官として移植されるときに、管状
本体は生体のj管の弾性に可能な限り類似した弾性を有すべきである。管状本体
は器官が応力および歪をうけている間囲繞する器官例えば血管に対して固定され
た状態に保たれなければならない。管状本体はまた同時に例えば補液の脈動また
は手足の曲げに追従するために十分な適応性を有するように半径方向にかつ軸線
方向に弾性を有していなければならない。管状本体は例えば外圧を受けていると
きにその形状を維持するように十分な固有の剛性を有しておりかつ内圧に耐える
ために十分な強度を有していなければ々ら々い。
これらの性質を得るAめに、実際の適用領域べ対する管状本体のスレッド要素の
材料および寸法を注意して選択しかつ適応させることが好適である。スレッド要
素の材料が組織と適合し、すなわちとりわけ拒絶反応を最小にし、無毒性であり
かつ細胞の生長を可能にする明白な必要条件に加えて、材料が剛性かつ弾性を有
し、しかも任意の有意な範囲捷で可塑変形し々いことが一般的にいえよう。この
材料は例えばh61Jエステル、ポリウレタン、ポリカーボネート、ポ゛リサル
フイド、ポリプロピレン、h61Jエチレン、ポリスルホネート、ステンレス鋼
、銀の単繊維(モノフィラメント)とすることができる。単繊維の直径は好まし
くは001〜05ての範囲内にあるべきである。
ある場合には、管状本体が拡張されるかまたけ無負荷状態にあるかまたは無負荷
に近い状態にあるときに管状本体のスレッド要素の間、例えば、第1A図のスレ
ッド要素2および2aの間の角度がとりわけ上記の必要条件を満たすために十分
に大きいことが肝要であることが判明した。角度aが大きい程、外圧をうけてい
るときの管状本体の安定性が高いととが判明した。この観点から理想的な角度は
180°であるが、この角度は実際には得られない。第1A図に示した角度は約
160°であり、これは通常上限に近い。
管状本体の直径を変えるためには、前述したように、管状本体の両端部を互いに
相対して軸線方向に変位させることが必要である。第10図には、この移動の闇
の一般的な関係を示しである。管状本体の両端部を互いに離れるように移動させ
るときのチで示した該本体の直径の変化をY軸にプロットし、そして伸びとして
表わされるそれに対応した長さの変化餌)をX軸線にプロットしである。またX
軸に治って管状本体の直径の関数としての角度aをプロットした。
第10図から理解されるように、相対的な直径の減少は伸びのプロセスの開始時
には小さく、そして伸びが出発位置を示す100チであるときに90%程度1で
減少する。出発位置では、角度は極力180°に近い。200チの伸びにおいて
は、直径の減少が75チであり、そのときに対応する角度aは100°である。
直径の減少は伸びの増加につれて加速する。従って、伸びが250%から300
チに増加すると、直径の減少は60チから30チに減少する。すなわち伸びが比
較的に小さいときに、比較的大きい直径の変化が起る。この範囲内では、角度は
約70゜から40°まで減少する。前述したように、ある場合には、拡張した本
体が第10゛図の曲線においてできる限り左方の位置を占めることが望ましい。
すなわち角度aはできる限り太きくすべきである。移植された本体は所定の圧力
で血管壁に係合して固定された状態に保たれなければならないので、移植部材の
直径は自由に拡張したときの直径よりも小さくなければならない。
本発明による拡張しうる本体を面管寸たはその他の管状器官の中に移植するため
に使用する場合、必要、な拡張力は例えば螺旋形の交叉スレッド要素に固定され
た長手方向に延びる弾性ストリ、ングのような弾性装置により与えることができ
る。弾性装置がスレッド要素に固定されるときに大きい角度aを選択することに
より、前述した要求条件を簡単に満たすことができる。
角度aの値を大きくすることが屡々望ましい理由は人工器官の弾性が角度の減少
により損われるからである。
例えば、半径方向に外圧を受けているときには、変形に対する抵抗が小さく、そ
して人工器官と血管壁との間の局部的々軸線方向の変位が起り、その結果変位部
位における細胞の生長を阻害するおそれがある。角度aを高い値に選択するもう
一つの理由は高い拡張比すなわち拡張したときの本体の直径と収縮状態での本体
の直径との比が高いことが所望されるからである。例えば2から約6までの比を
得るためには、角度aは約1200を超えるべきである。角度aの選択はまた人
工器官のスレッド要素の材料によって左右される。プラスチック材料が選択され
た場合、角度aが小さ過ぎると、半径方向の弾性が過大になる。しかしながら、
あるその他の場合、例えば、tビtり大きい半径方向の屈曲が所望される場合に
は、小さい角度aを選択することが望ましいかもしれない。
第10図から、大きい角度aを使用するときに管状本体を大きく拡張させなけれ
ばならないことは明らかである。小さい直径の通路を通して継体内管路的移植を
可能ならしめるために、大きい角度aから出発する伸びはがなり犬きく、300
%およびそれ以上になりうる。
例えば血管を開いた状態に保持するために例えば普通人工器官または同様な装置
を移植するときに、一般的には囲繞面管壁に作用する圧力が少くとも約100
wJfに達することが望ましい。丑だ、超過してはならない最高圧力がある。こ
の最高圧力は場合により変化するが、血管の人工器官として使用されるときに約
500〜1.000 rrrmH?を超えてはならない。もしも所望の圧力が長
手方向に延びる弾性部材または弾性スリーブまたは膜により与えられるとすれば
、固定のために必要な圧力は有利な大きい角度aを選択したときに合理的な力に
よって得られる。
従って、計算は血管人工器官と囲繞する血管壁との間の円滑な円筒形係合におい
てもしも角度aが150°〜170゜である力らば固定を行うために数ニュート
ン(〜01−0、2 kp )の総合的な力が必要であることを示している。
この事実はまた外圧を受けている移植された人工器官の変位のリスクを減少させ
ることに寄与する。その理由は発生する摩擦力がこのような変位を阻止するため
に十分であるからである。しかし寿から、もしも角度aが例えば45°であると
すれば、約10〜20ニユートン(1−2kp)の力が必要になり、これは実際
には不利である。
本発明の人工器官が適用されたときに十分な態様でとりわけ必要な固定を行うよ
うに作動するためには、必要な拡張力を生ずる弾性材料についてこのような必要
条件が満たされなければならない。この材料はまた本体のスレッド要素への容認
しうる接着を生じ、そして勿論移植のために生化学的に容認可能でなければなら
ない。従って、この材料は低い弾性係数を有し、そして少くとも250〜600
チまでの伸びにおいて力と伸びとの間に直線的な関係を示すべきであり、捷だ有
意なヒステリシスを保有していてはならない。
本発明による拡張1〜うる本体を製造するために使用するのに好適であると判明
した上記の必要条件を満たす一群の弾性体がある。このような弾性体はセグメン
トポリウレタン(FUR)と呼ばれる物質の群中に包含されている。
セグメントポリウレタンのいくつかけRレタン(アップジョーン)、ヒオマー(
エチコン)、ニスタングツドリッチのような商品名で市販されている。これらの
物質は好適な溶剤中で溶解して溶液を形成することができる。
これらの溶液から、本体の骨組を形成する螺旋形の支持スレッド要素に取りつけ
るだめの薄い弾性バンドまたは薄肉チューブを調製することができる。
本発明による人工器官をいわゆるグラフトtたは血管用人工器官として使用する
場合に、人工器官の壁部は前述したように多孔性でありかつ范く、そして組織に
適合すべきであり、かつ自然の組織、とりわけ、新脈管内膜(neointim
a)の生長を可能ならしめるように構成されるべきである。゛セグメントピリウ
レタン(FUR)もまたかかる壁部を形成するだめに好適に使用される。その理
由は前記の性質を非常に高い弾性を有する壁部の必要条件と組み合わせることが
できるからである。このような壁部はFURの溶液から押出しにより形成された
セグメントPIIJRの繊維からなる薄いチューブの形態に調製することができ
る。繊維は交叉した点において相互に付着され、そして壁部は例えば繊維の厚さ
および密度を好適に調節することにより所望の多孔性を有するように構成するこ
とができる。得られたチューブは本体を囲繞するかまたは本体の内部に取りつけ
ることができる。寸だ、別の態様として、チューブを調製するときに、本体のス
レッド要素をチューブの材料と好適に結合させることができる。
浦管用人工器官に所望の拡張力を与えるために、FURのバンドは好適な多孔性
の壁材料と組み合わせることができる。この多孔性壁材料は本体のスレッド要素
の間に織りこまれた単繊維(モノフィラメント)または多繊維(マルチフィラメ
ント)で構成するかまたは前述したように調製された多孔性の弾性壁部で構成す
ることができる。
ある場合には、本体ま・たけそのバンド、スリーブまたは膜を例えばポリラクチ
ドおよび/またはポリウレタンのような生化学的に崩壊可能な物質から製造する
ととが好適であるかもしれない。
本発明の原理を適用した実施態様の例(ただしこれらの例に限定されるものでは
ない)を以下に記載する。
例 1 血管用グラフト
拡張時の直径 20mm
角度’a i 60゜
長 さ 100wm
直径15mn〜18mの範囲内で大動脈の中に移植するために好適である。
移植前の最小の直径 8晒
合計の伸び 約300%
固定のだめの計算された軸方向の力Q、1kpが0.15簡の厚さ、気孔サイズ
15〜50μmを有する微孔性の弾性FUR壁によって与えられた。
スレッド要素の材料:0.15mmの直径を有するポリエステル単繊維
要素の数 n=72(2x36)
例 2 狭窄症に対する面管用人工器官拡張時の直径 6朔
角度a 100゜
長 さ 200m
4〜5筋の直径範囲内で静脈中に移植。
合計の伸び 250条
拡張のだめの軸方向の力0.08kpが各々が1,5咽の幅および0.6咽の厚
さを有する4個のセグメントポリウレタンの弾性バンドにより与えられた。
スレッド要素行別:0.09脳の直径を有しかつ要素の数n=36(2X18)
であるポリプロピレン単繊維。
国際調査報告
Claims (1)
- 【特許請求の範囲】 1. 本体の両端部を相互に相対して軸線方向に移動させることにより変更しう る直径を有しかつ複数の個々の剛性でありしかも可撓性のスレッド要素(2,3 等、2a、3a等)から構成された可撓性の管状本体(1)を備えた継体内管路 的移植のだめの人工器官であって、前記可撓性のスレッド要素の各々が共通軸線 としての管状本体の中心線(7)に対して螺旋形に延び、前記複数個の要素(2 ,3等)が同一方向の巻きを有ししかも相互に相対して軸線方向に変位せしめら れかつ同様に相互に相対して軸線方向に変位゛せしめられしかも反対方向の巻き を有する複数個の要素(2a、3a等)と交叉する、継体内管路的移植のための 人工器官。 2 交叉する要素の間の軸線方向に対して形成された角度(a)が約60°より も大きく、そして好ましくは鈍角である請求の範囲第1項に記載の人工器官。 3、 交叉要素(2,3等、2a、3a等)が管状本体に安定性を与えるように 組みひも様形態に配列されている請求の範囲第1項または第2項のいずれか1項 に記載の人工器官。 4、 管状本体の要素(2,3等、2a、3a等)の数がnであり、nが少くと も10であることを特徴とする請求の範囲第1項、第21項捷たは第3項のいず れか1項に記載の人工器官。 5、 各々の巻き方向の要素の数がn/2であることを特徴とする請求の範囲第 4項に記載の人工器官。 6、管状本体が該管状本体と同一空間に広がる例えばバンド(11)または弾性 を有しかつ好寸しくは多孔性の膜のような弾性部材により半径方向に拡張した位 置を占めるように構成され、前記膜が管状本体のマントル面に沿って軸線方向に 延びかつ管状本体に偏倚力を作用させて管状本体を軸線方向に圧縮することを特 徴とする請求の範囲第1項から第5項までのいずれか1項に記載の人工器官。 Z 管状本体がスレッド要素を交叉点において相互に取りつけであるために本来 半径方向に拡張した位置を占める傾向を有していることを特徴とする請求の範囲 第1項から第5項までのいずれか1項に記載の人工器官。 8 管状本体の長さの主な部分に治って管状本体と同一空間に広がる多孔性材料 の膜を備えていることを特徴とする請求の範囲第1項から第7項までのいずれか 1項に記載の人工器官。 9、 管状本体(53)がその少くとも一方の端部において直径を縮少するよう に設計されそれにより適用されたときにフィルタとして作用することを特徴とす る請求の範囲第1項から第8項までのいずれか1項に記載の人工器官。 10、前記部材または膜が好ましくはセグメントポリウレタンからなる多孔性材 料で構成されていることを特徴とする請求の範囲第6項または第8項のいずれか 1項に記載の人工器官。 11.血管用グラフトとして使用するだめの請求の範囲第1項から第10項まで のいずれか1項に記載の人工器官。 12 請求の範囲第1項から第11項までのいずれか1項に記載の人工器官をそ の管状本体を収縮させた状態で普通の中の一つの位置に導入し、該人工器官を普 通の別の位置に継体内管路的に移送し、管状本体を普通の内部で前記その他の位 置において拡張させて管状本体を前記その他の位置で自己固定させることを包含 する面管内の人工器官の継体内管路的移植方法。 13 負荷されていない状態における人工器官の直径を前記その他の位置におけ る普通の内径よりも若干大きく選択して管その内壁に対して人工器官の内圧を与 える工程を含む請求の範囲第12項に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8202739A SE445884B (sv) | 1982-04-30 | 1982-04-30 | Anordning for implantation av en rorformig protes |
SE82027392FI | 1982-04-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59500652A true JPS59500652A (ja) | 1984-04-19 |
JPH0447575B2 JPH0447575B2 (ja) | 1992-08-04 |
Family
ID=20346693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58501556A Granted JPS59500652A (ja) | 1982-04-30 | 1983-04-11 | 伸縮可能な管状本体を備えた人工器官 |
Country Status (14)
Country | Link |
---|---|
US (2) | US4655771B1 (ja) |
JP (1) | JPS59500652A (ja) |
AU (1) | AU1518683A (ja) |
BE (1) | BE896616A (ja) |
CA (1) | CA1239755A (ja) |
CH (1) | CH662051A5 (ja) |
DE (1) | DE3342798T1 (ja) |
DK (1) | DK159368B3 (ja) |
FR (1) | FR2525896B1 (ja) |
GB (1) | GB2135585B (ja) |
IT (1) | IT1169405B (ja) |
NL (1) | NL192600C (ja) |
SE (1) | SE445884B (ja) |
WO (1) | WO1983003752A1 (ja) |
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CN114767202B (zh) * | 2022-04-24 | 2023-03-24 | 惠州市顺美医疗科技有限公司 | 一种颅内密网支架及其制备方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2717026B2 (ja) * | 1992-04-03 | 1998-02-18 | シュナイダー・(ユーエスエイ)・インコーポレーテッド | 半径方向に自然膨張するステントの中間領域での展開 |
JPH11285537A (ja) * | 1998-02-25 | 1999-10-19 | Cordis Corp | ワイヤ補強管プロテ―ゼ |
US8974516B2 (en) | 1999-02-01 | 2015-03-10 | Board Of Regents, The University Of Texas System | Plain woven stents |
JP2013052296A (ja) * | 1999-02-01 | 2013-03-21 | Board Of Regents The Univ Of Texas System | 織物血管内デバイスおよびその製法およびその搬送用装置 |
JP2014111126A (ja) * | 1999-02-01 | 2014-06-19 | Board Of Regents The Univ Of Texas System | 織物血管内デバイスおよびその製法およびその搬送用装置 |
US9925074B2 (en) | 1999-02-01 | 2018-03-27 | Board Of Regents, The University Of Texas System | Plain woven stents |
US8876880B2 (en) | 1999-02-01 | 2014-11-04 | Board Of Regents, The University Of Texas System | Plain woven stents |
JP2010504820A (ja) * | 2006-09-28 | 2010-02-18 | クック・インコーポレイテッド | 胸部大動脈瘤を修復するための装置および方法 |
JP2014000443A (ja) * | 2006-09-28 | 2014-01-09 | Saint George Medical Inc | 胸部大動脈瘤を修復するための装置および方法 |
US8966733B2 (en) | 2006-10-22 | 2015-03-03 | Idev Technologies, Inc. | Secured strand end devices |
US9408729B2 (en) | 2006-10-22 | 2016-08-09 | Idev Technologies, Inc. | Secured strand end devices |
US9408730B2 (en) | 2006-10-22 | 2016-08-09 | Idev Technologies, Inc. | Secured strand end devices |
US9585776B2 (en) | 2006-10-22 | 2017-03-07 | Idev Technologies, Inc. | Secured strand end devices |
US9629736B2 (en) | 2006-10-22 | 2017-04-25 | Idev Technologies, Inc. | Secured strand end devices |
US9895242B2 (en) | 2006-10-22 | 2018-02-20 | Idev Technologies, Inc. | Secured strand end devices |
US8876881B2 (en) | 2006-10-22 | 2014-11-04 | Idev Technologies, Inc. | Devices for stent advancement |
US10470902B2 (en) | 2006-10-22 | 2019-11-12 | Idev Technologies, Inc. | Secured strand end devices |
US9023095B2 (en) | 2010-05-27 | 2015-05-05 | Idev Technologies, Inc. | Stent delivery system with pusher assembly |
US10022255B2 (en) | 2016-04-11 | 2018-07-17 | Idev Technologies, Inc. | Stent delivery system having anisotropic sheath |
Also Published As
Publication number | Publication date |
---|---|
NL8320142A (nl) | 1984-08-01 |
DK605483D0 (da) | 1983-12-29 |
CH662051A5 (de) | 1987-09-15 |
DK159368C (da) | 1991-04-22 |
GB2135585A (en) | 1984-09-05 |
DE3342798T1 (de) | 1985-01-10 |
DK159368B (da) | 1990-10-08 |
WO1983003752A1 (en) | 1983-11-10 |
IT8320864A0 (it) | 1983-04-29 |
FR2525896A1 (fr) | 1983-11-04 |
US4655771A (en) | 1987-04-07 |
US4954126A (en) | 1990-09-04 |
NL192600B (nl) | 1997-07-01 |
IT1169405B (it) | 1987-05-27 |
SE8202739L (sv) | 1983-10-31 |
US4954126B1 (en) | 1996-05-28 |
DK159368B3 (da) | 2002-02-04 |
SE445884B (sv) | 1986-07-28 |
GB8411519D0 (en) | 1984-06-13 |
US4655771B1 (en) | 1996-09-10 |
FR2525896B1 (fr) | 1990-11-30 |
AU1518683A (en) | 1983-11-21 |
DE3342798C2 (ja) | 1992-10-08 |
BE896616A (fr) | 1983-08-16 |
CA1239755A (en) | 1988-08-02 |
NL192600C (nl) | 1997-11-04 |
GB2135585B (en) | 1986-03-05 |
JPH0447575B2 (ja) | 1992-08-04 |
DK605483A (da) | 1983-12-29 |
IT8320864A1 (it) | 1984-10-29 |
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