JP4824699B2 - 人工液流補綴装置 - Google Patents
人工液流補綴装置 Download PDFInfo
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Images
Classifications
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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
- 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
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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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- A61F2/00—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
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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
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- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0039—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in diameter
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- External Artificial Organs (AREA)
Description
米国特許5,344,422 Deac
米国特許5,908,451 Yeo
米国特許6,312,465 Griffin他
米国特許出願公報2004/0260389 Case他
PCT特許出願公報2005/002466 Shwammenthal他(本特許出願の譲受人に譲渡されている)
米国特許5,354,330、米国特許4,078,268、米国特許4,846,830、米国特許5,108,425、米国特許6,299,638、米国特許出願公報2004/0186563、米国特許出願公報2004/0215333、米国特許出願公報2005/011511
Heinrich RS et al., Ann Biomed Eng. 1996 Nov-Dec;24(6):685-94. 大動脈弁狭窄症における流体力学的エネルギー損失の実験分析:圧回復の重要性。
Heinrich RS et al., J Heart Valve Dis. Sep. 1998;8(5):509-15. 大動脈弁狭窄症の重度指標として、弁口部のみでは不十分:大動脈全域でのエネルギー損失における近位および遠位幾何学の効果。
Marcus RH et al., Circulation. Sep 1, 1998;98(9):866-72. 小径大動脈の機械的補綴の評価:ドプラ勾配の生理学的関連性、液流強化の活用、および弁口部の定量限界。
PD Stein et al., Circulation Research, Vol. 39, 5 8-65, 1976 by American Heart Association. 人の上行大動脈における血液乱流;正常弁および疾患弁。
Ku D., Annual Review of Fluid Mechanics Vol. 29: 399-434(1997年発行). 動脈の血流。
Weyman AB et al., Rev Cardiovasc Med. 2005;61(1)23-32. 大動脈弁狭窄症:物理学的および生理学的考察──数値が実際に意味すること。
Deac RF et al., Ann Thorac Surg. Aug. 1995 Aug;60(2 Suppl):S433-8. 僧帽弁生理学および外科学における新たな発展:僧帽弁ステント不在心膜弁。
ここに引用されているすべての特許および特許出願、論文は、参考としてここに包含するものである。
・流入口
・流入口から離れた発散部位
・軸方向に伸長できる複数のストラットを含む人工補綴装置。これは、患者の心周期を通して、個々のストラットの遠位末端部が、互いに、近位末端部に比較して大きな間隔を保つことができるように、少なくとも当該発散部位分だけ伸長し、外部に向けて発散する。
・発散エンベロープを含む発散部位。これは、ストラットに組み合わされており、心収縮期における開口状態を再現するように作られており、これにより、血流が当該装置を通過することを可能にする。さらに、折り畳み、血流通過を遮断し、心拡張期の閉口状態を再現するよう作られている。
先に示した通り、本発明である人工補綴装置には、発散型(円すい構造が好ましい)セクション5の遠位末端部DEに人工補綴装置とともに植え込まれる、人工弁が含まれることが好ましい。しかしながら、いくつかの適用環境においては、本人工補綴装置は、人工弁なしに植え込み、人工弁は二次手術により大動脈内の人工補綴装置の下流に植え込むことができることも期待されている。
図9では、上記に解説されている図4〜8に示されているものと同様の人工補綴装置が図解されている。理解を促すことを目的に、対応する部品には同じ番号が割り当てられている。図9の人工補綴装置の主な違いは、構造体10の遠位末端部DEに備えられた支持器20である。これは、図10に示されているように、大動脈内での人工補綴装置の支持のため、特に遠位末端部において、大動脈の内壁表面に合わせることができる。
図12〜14では、人工補綴弁としても機能する基部110およびエンベロープ111を含むことができる人工補綴装置が図解されている。収縮期において、エンベロープ111は開口し、その目的で構成された発散型円すい構造により、大動脈への非乱流性血流を生成し、エンベロープの遠位末端部での圧回復を行なう。拡張期には、エンベロープ111は閉じ、血流を遮断(実質的に、または完全に遮断)する。図12〜14に示されている人工補綴装置(他の図にあるものと同様に)は、単一の血流を生成することを特筆する。言い換えるならば、当該装置に流入する血液は、装置内の普通の区分を通過して流出する。
上記に解説されているように、本発明であるところの人工補綴装置は、体内循環系の内壁に存在する弁口に植え込むことができる。従って、循環系を介して移植箇所に配置するための圧縮状態を持つよう、また、弁口への移植のため、移植箇所で拡張状態にできるよう作成されている。上記に解説されている本発明の実施態様は、患者の心臓の大動脈弁輪への移植を目的としており、そのため、大動脈弁輪への経動脈配置、および、移植を行なう大動脈弁輪での拡張のために作成されている。
図15A〜15Hでは、人工補綴装置を配置する施術法が図解されている。図2の例では一鞘施術法が用いられており、図16A〜16Fでは、図11に示されている構成の人工補綴装置を配置するための施術法が図解されている。これには、支持器40の弁輪アレーが含まれている。
図17A〜17hでは、人工補綴装置の配置における二鞘施術法が図解されている。ここでの人工補綴装置は、引例を目的とし、図4〜8に示されているものである。以下に解説する。
Claims (18)
- 患者への移植に適し、血液流の通過する単一の血液流路を備え、以下をそれぞれ明確に形成するよう形作られた、人工補綴装置(10)を含む器具であって、
流入口(92)と、
流入口(92)から離れた発散部位(5)と、を画成するように形成された器具において、
前記人工補綴装置(10)が、軸方向に伸長できる複数のストラット(112)を含んでいて、前記複数のストラット(112)は、患者の心周期を通して、個々のストラット(112)の遠位末端部が、互いに、近位末端部に比較して大きな断面積を保つことができるように、少なくとも当該発散部位(5)に沿って延存し、そして前記近位端部から前記遠位端部に向けて発散するようになっており、
前記発散部位(5)にはエンベロープ(111)が含まれていて、前記エンベロープ(111)はストラットに組み合わされており、心収縮期における開口状態を再現するように作られており、これにより、血流が当該装置を通過することを可能にしていて、さらに、折り畳み、血流通過を遮断し、心拡張期の閉口状態を再現するよう作られている、
器具。 - 前記発散部位(5)と組み合わさり、その周囲を取り巻くステントを含む、請求項1に記載の器具。
- 単一素材からなるエンベロープ(111)が前記複数のストラット(112)それぞれに取り付けられている、請求項1に記載の器具。
- 前記エンベロープ(111)が複数の分割された部分を含んでいて、前記複数の分割された部分各々が2つのストラット(112)に取り付けられている、請求項1に記載の器具。
- 人工補綴装置(10)が1つの係留部位(13a,14a)を備えていて、前記係留部位(13a,14a)は前記装置を患者の大動脈弁に装着するためのものであり、移植において、前記発散部位(5)は、患者の上行大動脈内に収容されるようになっている、請求項1に記載の器具。
- 人工補綴装置(10)が複数の係留部位(13a,14a)を備えていて、前記係留部位(13a,14a)は、患者の人体弁の両側に合わさるように形成されている、請求項1に記載の器具。
- 開張角度0.1°〜50°をもって開く発散型部位を含む、請求項1に記載の器具。
- 開張角度3°〜10°をもって開く発散型部位を含む、請求項1に記載の器具。
- 開張角度5°〜8°をもって開く発散型部位を含む、請求項1に記載の器具。
- 移植する患者の大動脈弁口(AO)の大きさに合わせて形成された人工補綴装置(10)を含んでいて、患者の人体に既存の弁口の直径が、施術により拡大されることはない、請求項1に記載の器具。
- 移植する患者の大動脈弁口(AO)の大きさに合わせて形成された人工補綴装置(10)を含んでいて、患者の大動脈弁は切除されていない、請求項1に記載の器具。
- 流入口(92)と発散部位(5)の間に頸部セクション(2)を明確に形作るよう形成された人工補綴装置(10)を含む、請求項1−11のいずれか一項に記載の器具。
- 患者の上行大動脈内に植え込むことができるように形成された人工補綴装置(10)を含んでいて、この際、発散部位(5)は、収縮期における、頸部セクション(2)内で損失した血圧の圧回復をもたらすよう形成されている、請求項12に記載の器具。
- 患者の大動脈弁口内(AO)に位置するよう形成された当該頸部セクション(2)を含む、請求項12に記載の器具。
- 軸方向の長さ20mm以下である当該頸部セクション(2)を含む、請求項12に記載の器具。
- 前記頸部セクション(2)の軸方向の長さが1〜10mmである、請求項15に記載の器具。
- 前記頸部セクション(2)の軸方向の長さが約2mmである、請求項15に記載の器具。
- 前記頸部セクション(2)の軸方向の長さが5mmである、請求項15に記載の器具。
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US11/024,908 US7201772B2 (en) | 2003-07-08 | 2004-12-30 | Fluid flow prosthetic device |
PCT/IL2005/001399 WO2006070372A2 (en) | 2004-12-30 | 2005-12-29 | Fluid flow prosthetic device |
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- 2005-12-29 CA CA2592892A patent/CA2592892C/en not_active Expired - Fee Related
- 2005-12-29 EP EP05821532.8A patent/EP1838241B1/en not_active Ceased
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Also Published As
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AU2005320929A1 (en) | 2006-07-06 |
EP1838241A4 (en) | 2011-12-28 |
CN101287424B (zh) | 2011-02-09 |
JP2008537891A (ja) | 2008-10-02 |
CA2592892C (en) | 2013-11-26 |
WO2006070372A2 (en) | 2006-07-06 |
EP1838241B1 (en) | 2014-02-12 |
US20060149360A1 (en) | 2006-07-06 |
US7201772B2 (en) | 2007-04-10 |
US20070185565A1 (en) | 2007-08-09 |
WO2006070372A3 (en) | 2006-11-16 |
CN101287424A (zh) | 2008-10-15 |
US7442204B2 (en) | 2008-10-28 |
CA2592892A1 (en) | 2006-07-06 |
EP1838241A2 (en) | 2007-10-03 |
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