JP2013163037A - 折畳み可能な人工心臓弁 - Google Patents
折畳み可能な人工心臓弁 Download PDFInfo
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- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
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- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
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- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2403—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with pivoting rigid closure members
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- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
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- 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
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
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- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
- A61F2/2415—Manufacturing methods
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- 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
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- 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
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0075—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
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Abstract
【解決手段】人工心臓弁であって、環状に折畳み可能であり且つ拡張可能な支持構造と、シート状である可撓性の弁尖部材と、を有し、該弁尖部材は、前記支持構造内側にはめ込まれ、該弁尖の自由エッジ部は、前記支持構造の内部にわたって可撓性のコードを形成し、該コードの端部を越える前記弁尖の材料はフラップを形成し、該フラップは、前記支持構造の内側及び外側表面の一方によって画定される円筒表面において少なくとも部分的に位置するよう折り畳まれ、前記支持構造と前記弁尖との間にシート状の可撓性のバッファ材料を更に有する、人工心臓弁。
【選択図】 図13
Description
環状に折畳み可能であり且つ拡張可能な支持構造と、
シート状である可撓性の弁尖部材と、
を有し、
該弁尖部材は、前記支持構造内側にはめ込まれ、該弁尖の自由エッジ部は、前記支持構造の内部にわたって可撓性のコードを形成し、該コードの端部を越える前記弁尖の材料はフラップを形成し、該フラップは、前記支持構造の内側及び外側表面の一方によって画定される円筒表面において少なくとも部分的に位置するよう折り畳まれ、
前記支持構造と前記弁尖との間にシート状の可撓性のバッファ材料を更に有する、
人工心臓弁。
図2a−bは、大動脈に対する超拡張部(extra-expanded section)30及び基部40におけるスカートフレア50を有する拡張成形ステント(expanded and contoured stent)10の一実施例を示す。(参照符号は、異なる図及び異なる実施例において概ね類似する特徴に対して再度使用される。図によっては、描写を過度に複雑にすることを避けるよう全ての構造の後背部又は前面後背部を示していないものがある。)ポスト20a−cに対する弁尖(図示せず)の取付け部及びステントのカバーリングは、本発明の重要な態様である。
●可撓性の弁尖60a−c(例えばポリマシート又は心膜組織シート)は、加工され、適切な形状に切断される。
○ 例えば組織弁尖60a−cは、平らに置かれ得、エタノールの少なくとも60%溶液等である抗石灰化処置で処理される前にグルタルアルデヒド又はトリグリシジアミンを使用して固定される。
● バッファ材料70(例えばポリマシート又は心膜組織シート)は、加工され、適切な形状に切断される。
● カフ材料80(例えばポリエステルファブリックシートは、適切な直径を有するチューブへと形成され、適切な長さに切断される。
● カフ材料80は、ステント10の下方部分、弁尖が取り付けられる全体部分、及び/又は大動脈部を有するステント全体をカバーし得る。
● ステント10と弁尖材料60との間における1つ又はそれより多くの層(シート)の中間材料は、取付け、摩擦緩衝、及び組織の内部成長を目的として適用され得る。例えば、2つのポリマ又は組織層間の接触面(インターフェイス)は、弁尖60とステント10との間における緩衝されない接触面と比較すると、上述された理由により、有益であり得る(例えば、弁尖60上における摩擦がより少なく、従って摩耗がより少ない)。シートのみの代わりにステントの潤滑ポリマコーティングもまた、組み込まれ得る。
● 弁尖60は、ステント10に対して、ステント基部の周囲において取り付けられる。
上述に加えて、本発明は、ステントセル端部に対してカフ80をしっかりと固定することにおいて起こり得る困難に対処し得る。例えば、特にはステント部40が参照符号50に示される通り広げられるとき、近接するカフ材料80は、弁尖60がカフ材料に対して固定されて荷重を受けるとき、ステントに沿って垂直方向に滑る傾向を有し得る。図65中の参照符号440は、このことが問題となり得る代表的な場所を示している。かかる場所440においてアイレット91を縫合が通ることは、材料が滑ることを防ぐ支援をし得る。図66−68はまた、カフ80をステントに対してよりしっかりと固定する支援をするためにステントセルの上部及び/又は下部において与えられ得る複数の他の形状を示す。例えば、図66は、代表的なステントセル40/50の端部における拡大された節状部(knob)450を与えることを示す。節状部450は、小さなネック領域452によってステントセルに対して接続される。縫合材料90は、図66に示される通りネック452の周囲に巻き付けられ得、縫合90によってステントに対して固定される他の材料が図示されるステントセル端部から離れて(本例においては)上方向に動くことを防ぐ支援をする。
Claims (36)
- 人工心臓弁であって、
環状に折畳み可能であり且つ拡張可能な支持構造と、
シート状である可撓性の弁尖部材と、
を有し、
該弁尖部材は、前記支持構造内側にはめ込まれ、該弁尖の自由エッジ部は、前記支持構造の内部にわたって可撓性のコードを形成し、該コードの端部を越える前記弁尖の材料はフラップを形成し、該フラップは、前記支持構造の内側及び外側表面の一方によって画定される円筒表面において少なくとも部分的に位置するよう折り畳まれ、
前記支持構造と前記弁尖との間にシート状の可撓性のバッファ材料を更に有する、
人工心臓弁。 - 前記フラップは、前記支持構造に対して固定される、
請求項1記載の人工心臓弁。 - 前記フラップは、前記支持構造に対して該フラップを固定するよう前記支持構造に対して縫合される、
請求項2記載の人工心臓弁。 - 前記フラップは、前記支持構造の前記内側表面によって画定される前記円筒表面において少なくとも部分的に位置する、
請求項1記載の人工心臓弁。 - 前記フラップは、前記支持構造の前記外側表面によって画定される前記円筒表面において少なくとも部分的に位置するよう前記支持構造を通過する、
請求項1記載の人工心臓弁。 - 前記弁尖と協働する強化コア、及び前記弁尖を前記支持構造に対して固定するための縫合、
を更に有する請求項1記載の人工心臓弁。 - 前記弁尖と協働する強化コア、及び前記フラップを前記支持構造に対して固定するための縫合、
を更に有する請求項3記載の人工心臓弁。 - 前記弁尖は、該弁尖の介在膨らみ部にわたって前記自由エッジ部から離間される固定ライン部を備え、該固定ライン部は、前記支持構造に対して固定され、前記膨らみ部から離れて前記固定ライン部を越える前記弁尖の追加的な材料は、前記支持構造の前記内側及び外側表面の一方によって画定される円筒表面において少なくとも部分的に位置するよう折り曲げられる第2のフラップを形成する、
請求項1記載の人工心臓弁。 - 前記第2のフラップは、前記自由エッジ部に向かって折り曲げられ、前記支持構造内側において前記支持構造に対して固定される、
請求項8記載の人工心臓弁。 - 前記第2のフラップは、前記自由エッジ部から離れて折り曲げられ、前記支持構造内側において前記支持構造に対して固定される、
請求項8記載の人工心臓弁。 - 前記第2のフラップは、前記支持構造の軸方向端部を越えて継続し、追加的に、前記支持構造の前記軸方向端部の上方にわたって折り曲げられ、前記支持構造の外側に対する追加的な固定に対して前記支持構造の外側に折り曲げ返される、
請求項10記載の人工心臓弁。 - 前記第2のフラップと協働する強化コア、及び前記第2のフラップを前記支持構造に対して固定するための縫合、
を更に有する請求項8記載の人工心臓弁。 - 前記支持構造は、
複数の環状に離間された交連ポスト、
を有し、
前記フラップは、該交連ポストの関連付けられる1つに対して固定される、
請求項1記載の人工心臓弁。 - 前記フラップは、前記フラップ及び前記関連付けられる交連ポストを通る開口を通過する縫合材料によって、前記関連付けられる交連ポストに対して固定される、
請求項13記載の人工心臓弁。 - 前記フラップは、前記関連付けられる交連ポストの周囲において折り曲げられる、
請求項13記載の人工心臓弁。 - 前記関連付けられる交連ポストは、2つの離間された部材へと二分岐され、
前記フラップは、該2つの部材間における前記交連ポストを通る、
請求項13記載の人工心臓弁。 - 各交連ポストの少なくとも一部は、前記支持構造の他の構造からカンチレバー状態にされる、
請求項13記載の人工心臓弁。 - 前記支持構造は、
該支持構造が周囲において環状である軸に沿って互いから離間される、複数の環状である環状に折畳み可能であり且つ再拡張可能なサブ構造と、
複数の連結部材と、
を有し、
該連結部材は、前記軸に対して実質的に平行であり、前記サブ構造が環状に折り畳まれ且つ再拡張されるとき、前記連結部材の変形を有することなく前記サブ構造に相互接続する、
請求項1記載の人工心臓弁。 - 人工心臓弁であって、
環状である環状に折畳み可能且つ再拡張可能な支持構造と、
可撓性の弁尖材料のシートと、
を有し、
該可撓性弁尖材料のシートは、前記支持構造において配置され、固定ライン部及び前記支持構造に対して固定される弁尖連結範囲を有し、前記自由エッジは、前記支持構造の内部において集まり得、
前記弁尖材料のシートは、3つの側部を有する中心開口を備え、
前記側部の各々は、前記弁尖構造の3つの作動弁尖部の夫々1つの自由エッジを形成するよう成形され、前記シートは追加的に、3つの固定ライン部を備え、該固定ライン部の各々は、前記自由エッジの夫々関連付けられる1つから半径方向外向きであり、また、各々は、弓状であるため、前記関連付けられる自由エッジの終点からよりも前記関連付けられる自由エッジの中間点から半径方向に離され、
前記支持構造と前記弁尖との間にシート状の可撓性のバッファ材料を更に有する、
人工心臓弁。 - 前記シートは、3つの弁尖連結範囲を画定し、該範囲の各々は、夫々一組の前記自由エッジの接合部から該組における前記自由エッジから半径方向外向きである前記固定ライン部の接合部まで、半径方向外向きに延在する、
請求項19記載の人工心臓弁。 - 前記シートは、前記弁尖連結範囲の少なくとも1つから前記中央開口へと延在するフラップを画定する、
請求項20記載の人工心臓弁。 - 前記自由エッジの各々は、該自由エッジの夫々対向する端部における前記弁尖連結範囲間の前記中央開口へと半径方向内向きに湾曲される、
請求項20記載の人工心臓弁。 - 前記支持構造は、
3つの環状に離間された交連ポスト、
を有し、
前記弁尖連結範囲の各々は、前記交連ポストの夫々1つに対して固定される、
請求項20記載の人工心臓弁。 - 前記弁尖連結範囲の少なくとも1つは、前記弁尖連結範囲が固定される前記交連ポストにおいて前記支持構造の外側を通る、
請求項23記載の人工心臓弁。 - 前記交連ポストの少なくとも1つは、2つの離間された部材へと二分岐され、
該交連ポストに対して固定される前記弁尖連結範囲は、前記交連ポストの前記2つの部材間を通る、
請求項23記載の人工心臓弁。 - 前記シートは、フラップを形成するよう前記固定ライン部の少なくとも1つの少なくとも一部を越えて半径方向外向きに継続する、
請求項24記載の人工心臓弁。 - 前記フラップは、前記支持構造に固定される、
請求項26記載の人工心臓弁。 - 前記フラップは、前記支持構造内側において固定される、
請求項27記載の人工心臓弁。 - 前記フラップは、前記支持構造外側において固定される、
請求項27記載の人工心臓弁。 - 前記交連ポストの各々は、前記支持構造の他の構造から少なくとも部分的にカンチレバー状態にされる、
請求項23記載の人工心臓弁。 - 人工心臓弁であって、
環状である、環状に折畳み可能且つ再拡張可能な支持構造と、
該支持構造に対して固定される可撓性材料のシートと、
前記支持構造内側において配置され、前記シートに対して少なくとも部分的に固定される、複数の可撓性の弁尖と、
を有し、
前記支持構造は、該支持構造の環状である方向において延在するジグザグパターンで配置される複数の部材を有し、該部材の少なくとも2つは、前記支持構造が周囲において環状である軸に対して平行である前記支持構造から離れる向きを指す頂点において集まり、
前記シートは、前記頂点における縫合取り付けを介して前記支持構造に対して少なくとも部分的に固定され、前記頂点は、該頂点が指す方向に対して対向する方向において前記縫合取り付けが前記頂点から離れて動くことを防ぐよう形成され、
前記支持構造と前記弁尖との間にシート状の可撓性のバッファ材料を更に有する、
人工心臓弁。 - 前記頂点は、前記縫合取り付けが通過するアイレットを有する、
請求項31記載の人工心臓弁。 - 前記頂点は、該頂点が指す方向において延在する縮小されたネック部の端部において拡大ネック部を有し、前記縫合取り付けは、前記ネック部の周囲に巻き付けられる、
請求項31記載の人工心臓弁。 - 前記頂点は、該頂点が指す方向において開放するノッチを有し、前記縫合取り付けは、前記頂点の内側及び該ノッチの内側の周囲に巻き付けられる、
請求項31記載の人工心臓弁。 - 前記ノッチは、開放アイレットを形成するようその入口の近くにおいてより幅を狭くされる、
請求項34記載の人工心臓弁。 - 前記アイレットは、縫合針の通過に対しては小さすぎるが、前記入口は、縫合材料がくぐり抜けるには十分に大きい、
請求項35記載の人工心臓弁。
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