JP7112474B2 - 血液ポンプ - Google Patents
血液ポンプ Download PDFInfo
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- JP7112474B2 JP7112474B2 JP2020208175A JP2020208175A JP7112474B2 JP 7112474 B2 JP7112474 B2 JP 7112474B2 JP 2020208175 A JP2020208175 A JP 2020208175A JP 2020208175 A JP2020208175 A JP 2020208175A JP 7112474 B2 JP7112474 B2 JP 7112474B2
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- 206010053567 Coagulopathies Diseases 0.000 description 3
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- A61M60/13—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
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- A61M60/135—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel inside a blood vessel, e.g. using grafting
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Description
1.血液ポンプであって、血流入口と血流出口とを有するポンプケーシングと、前記ポンプケーシング内に配置され、回転軸を中心として回転可能となるように少なくとも1つの軸受によってポンプケーシングに回転可能に支持されたインペラとを備え、前記インペラは、血液を前記血流入口から前記血流出口へ搬送するための少なくとも1枚のブレードを有し、前記軸受は、前記ポンプケーシングに結合され、径方向外側に面する固定軸受面を有する少なくとも1つの固定軸受部を含み、前記軸受は、さらに、前記固定軸受面と相互作用して前記軸受を形成する回転軸受面を備え、前記回転軸受面は、径方向内側に面しており、前記少なくとも1枚のブレードの少なくとも1つの露出された径方向内側の縁部上、又はブレードの露出された径方向内側の縁部に結合された軸受構造上に形成されている血液ポンプ。
Claims (15)
- 血流入口(21)及び血流出口(22)を有するポンプケーシング(2)と、
前記ポンプケーシング内に配置され、少なくとも1つの軸受(160、260、460、560、860)によって前記ポンプケーシングに回転軸を中心として回転可能に支持されたインペラ(103)を備え、前記インペラ(103)は、少なくとも1枚のブレード(131、132)を有して血液を前記血流入口から前記血流出口へ搬送し、
前記少なくとも1つの軸受(160、260、460、560、860)は、第1の軸受(160)を有し、前記第1の軸受(160)は、前記ポンプケーシング(2)に結合され、前記インペラ(103)の第1の軸方向端部において前記インペラ(103)内へ軸方向に延び、径方向外側に向いた固定軸受面(161)を有する少なくとも1つの固定軸受部(104、211、511)を備え、前記第1の軸受(160)は、前記固定軸受面(161)と相互作用して前記第1の軸受(160)を形成する回転軸受面(162、163)をさらに有し、前記回転軸受面(162、163)は、径方向内側に面し、少なくとも1枚の前記ブレード(131、132)の少なくとも1枚(132)の露出された径方向内側の縁部(150)に結合された軸受構造(151、152、153、155)上に形成される、血液ポンプ(1)であって、
前記少なくとも1つの軸受(160、260、460、560、860)は、前記インペラ(103)の前記第1の軸方向端部とは逆側の第2の軸方向端部において前記インペラ(103)内へ軸方向に延びる固定軸受部(210、410、510)を有する第2の軸受(260、460、560、860)を有する、血液ポンプ(1)。 - 前記固定軸受部(104、211、511、210、410、510)は、回転軸に沿って延在する少なくとも1つのピン(204、404、504)又は円錐を含み、前記固定軸受部の形状は、略円筒形又はテーパ状である請求項1に記載の血液ポンプ。
- 前記固定軸受部(211、210)は、そこを貫通して延在する中央軸方向通路(234)を有する請求項2に記載の血液ポンプ。
- 前記固定軸受部(210、410、510)は、少なくとも1つの開口を備えて血液を軸方向に通過可能にする支持構造(213)により前記ポンプケーシング(2)に結合されており、前記支持構造(213)が血流を径方向に導くことができるような寸法及び形状を有する請求項1~3のいずれか1項に記載の血液ポンプ。
- 前記少なくとも1枚のブレード(131、132)は、前記インペラ(103)のハブ(136)の外面と前記インペラ(103)の前記ハブ(136)の内面の少なくとも一方に配置されており、前記少なくとも1枚のブレード(131)が前記インペラ(103)のハブ(136)の前記外面上に配置される場合は、前記ブレード(131)は、前記ハブ(136)を越えて軸方向に延在する請求項1~4のいずれか1項に記載の血液ポンプ。
- 前記インペラ(103)は、前記インペラ(103)のハブ(136)を通って延在する血液流路(133)を有し、前記インペラ(103)は、ハブ(136)の外面上に配置され、血液を前記血流入口(21)から前記血流出口(22)へ搬送できる寸法と形状を有する少なくとも1枚の外側ブレード(131)と、前記血液流路(133)内に配設され、血液を前記血液流路(133)を通して搬送できる寸法と形状を有する少なくとも1枚の内側ブレード(132)を備える請求項1~5のいずれか1項に記載の血液ポンプ。
- 前記インペラ(103)の前記血液流路(133)は、前記回転軸の少なくとも部分的に又は全体に沿って延在し、前記少なくとも1つの固定軸受部(104)は、前記インペラ(103)の前記血液流路(133)の長さの少なくとも半分又は少なくとも3/4に沿って延在する、あるいは前記通路(133)全体を通って延在する請求項6に記載の血液ポンプ。
- 前記インペラは、少なくとも1つの径方向開口を有し、前記血液流路を前記インペラの環境と接続する請求項7に記載の血液ポンプ。
- 前記少なくとも1枚のブレード(131、132)は、前記インペラ(103)上に配置されており、前記ブレードが前記インペラ(103)の前記ハブ(136)によって前記内側ブレード(132)を形成する内側部分と前記外側ブレード(131)を形成する外側部分に分割される請求項6~8のいずれか1項に記載の血液ポンプ。
- 前記ポンプケーシング(2)は、流れの主方向の前記血流入口(521、821)と前記血流出口(522、822)から軸方向に離間した二次血流入口(523、823)を有し、前記インペラは、少なくとも2枚のブレード(531、532、831、832)を備え、その少なくとも一方(531、831)は、前記血流入口(521、821)に関連付けられて血液を前記血流入口(521、821)から前記血流出口(531、831)へ流れの主方向に搬送し、少なくとも他方(532、832)は、前記二次血流入口(532、832)に関連付けられて血液を前記二次血流入口(532、832)から前記血流出口(531、831)へ前記流れの主方向とは反対の方向に搬送し、前記少なくとも2枚のブレード(531、532、831、832)は中間部分に隣接する前記インペラの軸方向に対向する部分に配置される請求項1~9のいずれか1項に記載の血液ポンプ。
- 前記二次血流入口(523、823)に関連付けられた前記少なくとも1枚のブレード(532、832)は、血液を前記インペラの前記中間部分に沿って搬送できる寸法及び形状である請求項10に記載の血液ポンプ。
- 前記回転軸受構造(155、153)は、前記固定軸受部(104)の少なくとも一部を取り囲む少なくとも1つのリング(155)と、前記固定軸受部(104)の少なくとも一部と係合する少なくとも1つのウィング(153)のうち少なくとも1つを含み、及び/又は、前記回転軸受面(151、152)は、前記固定軸受部(104)の軸方向端部(142)に係合できる寸法と形状である請求項1~11のいずれか1項に記載の血液ポンプ。
- 前記インペラを駆動する電動モータを備え、前記電動モータのステータ(505)は、前記ポンプケーシングに結合され、前記インペラを中心として円周方向に配置され、前記電動モータの前記ステータ(505)は、回転磁界を生成するための少なくとも1つの電気構成を含み、前記インペラは、少なくとも1つの永久磁石(570)を含む請求項1~12のいずれか1項に記載の血液ポンプ。
- 前記固定軸受部(410)と前記インペラはそれぞれ、少なくとも1つの磁石(472、473)を備え、前記固定軸受部(410)における前記磁石(472)と前記インペラ内の前記磁石(473)は径方向に整列し、前記固定軸受部と前記インペラにそれぞれ配置され、軸方向の反発磁力が前記固定軸受部(410)と前記インペラの間に生成される請求項1~13のいずれか1項に記載の血液ポンプ。
- 前記固定軸受面(161)と前記回転軸受面(162、163)の少なくとも一方は、それぞれ、前記固定軸受部(104、211、511)と前記インペラ(103)の残りの部分の材料よりも高い硬度を有する材料を含む請求項1~14のいずれか1項に記載の血液ポンプ。
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