JP7052142B2 - 流れ制限ステントグラフト - Google Patents
流れ制限ステントグラフト Download PDFInfo
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- JP7052142B2 JP7052142B2 JP2021503909A JP2021503909A JP7052142B2 JP 7052142 B2 JP7052142 B2 JP 7052142B2 JP 2021503909 A JP2021503909 A JP 2021503909A JP 2021503909 A JP2021503909 A JP 2021503909A JP 7052142 B2 JP7052142 B2 JP 7052142B2
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Description
本出願は、2018年7月24日に出願された仮出願第62/702,700号の利益を主張し、その全体をあらゆる目的のために参照により本明細書に取り込む。
本開示は、心不全及び/又は他の心血管疾患を治療するためのシステム、メディカルデバイス及び方法に関する。より具体的には、本開示は、典型的には不良に起因する過剰な体液の蓄積を除去することに関する。
心不全を経験している患者は、体内に過剰な体液が蓄積している可能性がある。過剰な体液の蓄積は、間質腔への体液の蓄積を増加させ、患者の症状及び生活の質を悪化させる可能性がある。過剰な体液(又は循環血液量増加症)は、心不全患者の入院の主な原因である(米国で年間約1,000,000件)。
1つの例(「例1」)において、患者の血管内の血流を変化させるためのインプラント可能なメディカルデバイスは、血管の血管壁に接触するように構成された1つ以上のアンカー部分、前記1つ以上のアンカー部分に比べて直径が減少されたセクションを有する流れ制限部分、及び、前記流れ制限部分の少なくとも一部に結合され、主血管内の流れ抵抗を増加させて、前記血管からの1つ以上の側枝への血流を増加させるように構成された膜構成要素を含む。
添付の図面は、本開示のさらなる理解を提供するために含まれ、本明細書に組み込まれ、その一部を構成し、実施形態を示し、記載とともに、本開示の原理を説明するのに役立つ。
定義及び用語
本開示は、限定的な方法で読まれることを意図するものではない。例えば、本出願で使用される用語は、その分野の用語がそのような用語に帰する意味の文脈で広く読まれるべきである。
当業者は、本開示の様々な態様が、意図された機能を発揮するように構成された任意の数の方法及び装置によって実現されうることを容易に理解するであろう。本明細書で参照される添付の図面は、必ずしもスケール通りに描かれているわけではなく、本開示の様々な態様を例示するために誇張されている場合があり、その点で、図面は限定として解釈されるべきではないことにも留意されたい。
Claims (15)
- 患者の血管内の血流を変化させるためのインプラント可能なメディカルデバイスであって、前記インプラント可能なメディカルデバイスは、
血管の血管壁に接触するように構成された1つ以上のアンカー部分、
前記1つ以上のアンカー部分に比べて直径が減少されたセクションを有する流れ制限部分、及び、
前記流れ制限部分の少なくとも一部に結合され、主血管内の流れ抵抗を増加させて、前記血管からの1つ以上の側枝への血流を増加させるように構成された膜構成要素、
を含む、デバイス。 - 前記膜構成要素は、前記血管からの前記1つ以上の側枝への流れを約5%~約30%増加させるように構成されており、前記側枝は前記流れ制限部分の近位にある、請求項1記載のデバイス。
- 前記1つ以上のアンカー部分は第一のアンカー部分及び第二のアンカー部分を含み、前記流れ制限部分は砂時計形状を形成し、前記流れ制限部分は、前記第一のアンカー部分及び前記第二のアンカー部分のうちの1つ以上の直径を減少させるように内側にテーパー化されている、請求項1~2のいずれか1項記載のデバイス。
- 前記膜構成要素は前記第一のアンカー部分及び前記第二のアンカー部分のうちの一方に結合されており、そして前記第一のアンカー部分及び前記第二のアンカー部分の他方は覆われていない、請求項3記載のデバイス。
- 前記膜構成要素は前記第一のアンカー部分に結合されて、前記第一のアンカー部分を少なくとも部分的に覆い、前記第一のアンカー部分を横方向に通る血流を制限する、請求項4記載のデバイス。
- 前記第二のアンカー部分は覆われておらず、前記第二のアンカー部分を通って横方向に血流を通すことを可能にするように構成されている、請求項5記載のデバイス。
- 前記第二のアンカー部分は、前記血管からの前記1つ以上の側枝を閉塞する機会を減らすように構成されている、請求項6記載のデバイス。
- 前記膜構成要素は、前記第一のアンカー部分が血管壁と接触するように構成されている位置で前記第一のアンカー部分に結合されている、請求項5~6のいずれか1項記載のデバイス。
- 前記第一のアンカー部分上の前記膜構成要素の位置は血栓症生成を軽減するように構成されている、請求項8記載のデバイス。
- 前記血管は患者の大動脈であり、前記側枝は、腎動脈、腹腔動脈、肝動脈及び腸間膜動脈のうちの1つ以上であり、前記インプラント可能なメディカルデバイスは、大動脈内にインプラントし、腎動脈、腹腔動脈、肝動脈及び腸間膜動脈のうちの1つ以上への流れを増加させるように構成されている、請求項1~9のいずれか1項記載のデバイス。
- 前記膜構成要素は、静脈流出圧力と比較して、患者の腎臓を横切る少なくとも1つの腎動脈口での血圧を上昇させ、より多くの血液が腎臓を通って流れるように構成されている、請求項10記載のデバイス。
- 少なくとも1つの腎動脈口で血圧を上昇させるように構成された膜構成要素は、腎臓による体液ろ過の増加を促進して、利尿を増加させそして患者の体液貯留を減らすように構成されている、請求項11記載のデバイス。
- 前記膜構成要素は、前記1つ以上の側枝の遠位の血管の狭窄を約40%~約80%で誘発するように構成されている、請求項1~12のいずれか1項記載のデバイス。
- 前記膜構成要素は、前記1つ以上の側枝の遠位の血管の狭窄を50%~70%で誘発するように構成されている、請求項13記載のデバイス。
- 前記1つ以上のアンカー部分は、大静脈の血管壁に向かい合うように構成されており、前記膜構成要素は、腎臓からの血流を促進するために、一方又は両方の腎静脈の遠位にある大静脈の約40%~約90%の狭められた流れ管腔を作成するように構成されている、請求項1~14のいずれか1項記載のデバイス。
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