JP2009523488A - 回転式血液ポンプ - Google Patents
回転式血液ポンプ Download PDFInfo
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- JP2009523488A JP2009523488A JP2008550412A JP2008550412A JP2009523488A JP 2009523488 A JP2009523488 A JP 2009523488A JP 2008550412 A JP2008550412 A JP 2008550412A JP 2008550412 A JP2008550412 A JP 2008550412A JP 2009523488 A JP2009523488 A JP 2009523488A
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- impeller
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Images
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Abstract
【選択図】 図3
Description
より小さく、より効率的な回転式血液ポンプに対する需要が依然としてある。特に、ポンプによって送り込まれる血液において溶血および血栓症の危険性をさらに削減するために、流体軸受およびポンプ内の改善した連続流体流路を備えた磨滅のない遠心ポンプに対する需要が依然としてある。流体軸受および受動的磁気軸受を備えたより高度な回転式血液ポンプインペラを開発することによって、回転式血液ポンプの物理的サイズ、性能および効率は、一貫して信頼性の高い治療支援が提供されることができる程度まで改善されうる。
図面に示されている本発明の実施形態を記載するときに、特定の用語が、わかりやすくするために用いられる。しかし、本開示は、そのようにして選択された特定の用語に限定することを意図しているわけではなく、各特定の要素が、類似の態様で動作するすべての技術的等価物を含むことを理解すべきである。
Claims (65)
- 上部内面および下部内面を備え、血液注入口および接線方向の血液放出口を有するポンプ室を画定するハウジングと、
前記ポンプ室内にあって、前記ポンプ室内の血圧を増大させて、血液を前記血液放出口に移動させるように適合される回転可能なインペラと、を備え、前記インペラは、前記ポンプ室の前記上部内面に隣接する少なくとも1つの隆起した面エリアを有し、
前記隆起した面エリアの第1の先細りの領域は、前縁部分および後縁部分を有し、前記第1の先細りの領域と前記ハウジングの前記上部内面との間のギャップが、前記前縁部分から前記後縁部分まで減少し、前記インペラが回転中であるときに、前記インペラを前記ハウジングの前記上部内面から軸方向に偏らせるために流体推力負荷を生成するようになっており、
前記隆起した面エリアの第2の先細りの領域は、前記第1の先細りの領域の前記後縁部分に隣接する前縁部分と、後縁部分と、を有し、前記第2の先細りの領域と前記ハウジングの前記上部内面との間のギャップが、前記第2の先細りの領域の前記前縁部分から前記後縁部分まで増大し、血液が、溶血を生じることなく前記隆起した面エリアを横断する回転式血液ポンプ。 - 前記インペラは、回転軸に対して垂直である平面において実質的に円形の断面を有する請求項1に記載の血液ポンプ。
- 前記第1および第2の先細りの領域のそれぞれは、前記インペラの周縁部に隣接し、前記インペラの回転方向において先細りである請求項2に記載の血液ポンプ。
- 前記第1の先細りの領域は、湾曲しており、前記インペラの前記周縁部の曲率半径と実質的に同一である曲率半径を有する請求項3に記載の血液ポンプ。
- 前記第2の先細りの領域は、実質的に三角形であり、この外縁が前記インペラの前記周縁部の部分を構成する請求項4に記載の血液ポンプ。
- 前記ポンプ室の前記上部内面に隣接する少なくとも4つの前記隆起した面エリアを備え、前記隆起した面エリアの隣接するエリアが、前記インペラの前記周縁部に延在し、前記インペラの前記周縁部に出口を画定するチャネルによって離隔される請求項5に記載の血液ポンプ。
- 前記隆起した面エリアのそれぞれは、前記第1および第2の先細りの領域のそれぞれを備える請求項6に記載の血液ポンプ。
- 前記第2の先細りの領域のそれぞれの前記後縁部分は、前記チャネルの1つの側壁の上部に沿って出口縁を画定する請求項7に記載の血液ポンプ。
- 前記第1の先細りの領域のそれぞれの前記前縁部分は、前記チャネルの別の前縁側壁の前記上部に沿って入口縁を備え、前記入口縁のそれぞれの前記曲率半径は、約0.010インチ未満である請求項8に記載の血液ポンプ。
- 前記チャネルの前記出口は、実質的に90°離隔される請求項9に記載の血液ポンプ。
- 前記第1の先細りの領域のそれぞれの先細りの角度は、水平方向に対して1°未満である請求項10に記載の血液ポンプ。
- 前記第1の先細りの領域のそれぞれの前記曲率は、前記インペラの前記周縁部と同心であり、前記第1の先細りの領域のそれぞれは、この長さに沿って実質的に均一な幅である請求項4に記載の血液ポンプ。
- 前記第1の先細りの領域と前記ハウジングの前記上部内面との間の前記ギャップは、約0.003インチ〜0.020インチより小さい請求項1に記載の血液ポンプ。
- 前記第2の先細りの領域のそれぞれの先細りの角度は、前記水平方向に対して2〜4°の範囲内である請求項13に記載の血液ポンプ。
- 前記チャネルのそれぞれは、実質的に32°の角度で、前記インペラの実質的に前記底面から内向きに延在する傾斜底面を備える請求項6に記載の血液ポンプ。
- 前記ハウジングは、セラミック材料から形成される請求項1に記載の血液ポンプ。
- 前記ハウジングの前記上部内面は、セラミックディスクを備える請求項1に記載の血液ポンプ。
- 前記ハウジングの前記下部内面は、セラミックディスクを備える請求項1に記載の血液ポンプ。
- 前記インペラは、約77.6重量%の白金および22.4重量%のコバルトからなる合金から構成される請求項1に記載の血液ポンプ。
- 複数の外部電源ケーブルの近い端部との電気接続のために適合される電気コネクタを備える請求項1に記載の血液ポンプ。
- 前記外部電源ケーブルの遠い端部が、前記血液ポンプを駆動するための電源に電気的に接続される請求項20に記載の血液ポンプ。
- 前記電源ケーブルが埋め込まれる曲げやすい細長いシリンダを備える請求項21に記載の血液ポンプ。
- 前記曲げやすいシリンダは、シリコンから形成される請求項22に記載の血液ポンプ。
- 前記曲げやすいシリンダは、複数の長手方向の孔を備え、前記孔のそれぞれは、前記電源ケーブルの1つを包含する請求項23に記載の血液ポンプ。
- 前記曲げやすいシリンダは、6つの前記孔を備える請求項24に記載の血液ポンプ。
- 前記第1の先細りの領域の前記後縁部分および前記第2の先細りの領域の前記前縁部分は、実質的に同一の高さである請求項1に記載の血液ポンプ。
- 上部内面および下部内面を備え、血液注入口および接線方向の血液放出口を有するポンプ室を画定するハウジングと、
前記ポンプ室内にあって、前記ポンプ室内の血圧を増大させて、血液を前記血液放出口に移動させるように適合される回転可能なインペラと、を備え、前記インペラは、前記ポンプ室の前記上部内面に隣接する少なくとも1つの隆起した面エリアを有し、
前記隆起した面エリアの第1の先細りの領域は、前縁部分および後縁部分を有し、前記第1の先細りの領域と前記ハウジングの前記上部内面との間のギャップが、前記前縁部分から前記後縁部分まで減少し、前記インペラが回転中であるときに、前記インペラを前記ハウジングの前記上部内面から軸方向に偏らせるために作用する流体推力負荷を生成するようになっており、前記第1の先細りの領域のそれぞれは、この内側境界および外側境界のそれぞれに沿って前記前縁部分から前記後縁部分まで延在する覆いを有する回転式血液ポンプ。 - 前記ポンプ室の前記上部内面に隣接する少なくとも4つの前記隆起した面エリアを備え、前記隆起した面エリアの隣接するエリアが、前記インペラの前記周縁部に延在し、前記インペラの前記周縁部に出口を画定するチャネルによって離隔される請求項27に記載の血液ポンプ。
- 前記隆起した面エリアのそれぞれは、前記第1の先細りの領域の1つを備える請求項28に記載の血液ポンプ。
- 前記第1の先細りの領域のそれぞれの前記前縁部分は、前記チャネルの1つの前縁側壁の前記上部に沿って入口縁を備える請求項29に記載の血液ポンプ。
- 前記内側覆いおよび外側覆いは、前記入口縁より高く、前記第1の先細りの領域のそれぞれの前記後縁部分と同一平面である請求項30に記載の血液ポンプ。
- 前記覆いのそれぞれの前記上面は、実質的に平坦であり、約0.230インチ前記入口縁より高い請求項31に記載の血液ポンプ。
- 前記覆いのそれぞれは、幅が約0.020インチである請求項32に記載の血液ポンプ。
- 前記外側覆いのそれぞれの外面は、前記インペラの前記周縁部の部分を画定する請求項27に記載の血液ポンプ。
- 前記ハウジングは、セラミック材料から形成される請求項27に記載の血液ポンプ。
- 前記ハウジングの前記上部内面は、セラミックディスクを備える請求項27に記載の血液ポンプ。
- 前記ハウジングの前記下部内面は、セラミックディスクを備える請求項27に記載の血液ポンプ。
- 前記インペラは、約77.6重量%の白金および22.4重量%のコバルトからなる合金から構成される請求項27に記載の血液ポンプ。
- 複数の外部電源ケーブルの近い端部との電気接続のために適合される電気コネクタを備える請求項27に記載の血液ポンプ。
- 前記外部電源ケーブルの遠い端部が、前記血液ポンプを駆動するための電源に電気的に接続される請求項39に記載の血液ポンプ。
- 前記電源ケーブルが埋め込まれる曲げやすい細長いシリンダを備える請求項40に記載の血液ポンプ。
- 前記曲げやすいシリンダは、シリコンから形成される請求項41に記載の血液ポンプ。
- 前記曲げやすいシリンダは、複数の長手方向の孔を備え、前記孔のそれぞれは、前記電源ケーブルの1つを包含する請求項42に記載の血液ポンプ。
- 前記曲げやすいシリンダは、6つの前記孔を備える請求項43に記載の血液ポンプ。
- 上部内面および下部内面を備え、血液注入口および接線方向の血液放出口を有するポンプ室を画定するハウジングと、
前記ポンプ室内にあって、前記ポンプ室内の血圧を増大させて、血液を前記血液放出口に移動させるように適合される回転可能なインペラと、を備え、前記インペラは、前記ポンプ室の前記上部内面に隣接する少なくとも1つの隆起した面エリアを有し、前記隆起した面エリアは、前記1つの隆起した面エリアの下に空洞を画定するために複数の側壁を有する中空の円筒形ケーシングを備え、前記空洞は、前記インペラを滑らかに回転させるために、中に形成される複数の並ぶ釣り合い孔を有する少なくとも1つの中実壁部材によって境界を定められる回転式血液ポンプ。 - 前記インペラは、複数の前記隆起した面エリアと、前記隆起した面エリアのそれぞれの下に画定される空洞と、を備え、前記空洞のそれぞれは、少なくとも1つの前記中実壁部材によって境界を定められる請求項45に記載の血液ポンプ。
- 前記壁部材のそれぞれは、1対の前記並んだ孔を備える請求項46に記載の血液ポンプ。
- 前記孔のそれぞれの前記長手軸は、前記インペラの前記回転軸に平行に延在する請求項47に記載の血液ポンプ。
- 前記並んだ孔の各対を画定する前記孔は、等しくない深さである請求項48に記載の血液ポンプ。
- 前記並んだ孔の各対を画定する前記孔は、前記インペラケーシングの直径に沿って整列されている請求項49に記載の血液ポンプ。
- 前記空洞のそれぞれは、前記インペラを回転するために磁束を生成するように適合される永久駆動磁石を包含する請求項46に記載の血液ポンプ。
- 前記孔の各対の半径方向の最も内側の孔の深さは、約0.10インチである請求項50に記載の血液ポンプ。
- 前記孔の各対の半径方向の最も外側の孔の深さは、約0.25インチである請求項52に記載の血液ポンプ。
- 4つの前記中実壁部材によって離隔される4つの前記空洞があり、前記空洞および壁部材のそれぞれは、前記インペラの前記周縁部に隣接している請求項46に記載の血液ポンプ。
- 前記ハウジングは、セラミック材料から形成される請求項45に記載の回転式血液ポンプ。
- 前記ハウジングの前記上部内面は、セラミックディスクを備える請求項45に記載の回転式血液ポンプ。
- 前記ハウジングの前記下部内面は、セラミックディスクを備える請求項45に記載の回転式血液ポンプ。
- 前記インペラは、約77.6重量%の白金および22.4重量%のコバルトからなる合金から構成される請求項45に記載の回転式血液ポンプ。
- 複数の外部電源ケーブルの近い端部との電気接続のために適合される電気コネクタを備える請求項45に記載の血液ポンプ。
- 前記外部電源ケーブルの遠い端部が、前記血液ポンプを駆動するための電源に電気的に接続される請求項59に記載の血液ポンプ。
- 前記電源ケーブルが埋め込まれる曲げやすい細長いシリンダを備える請求項60に記載の血液ポンプ。
- 前記曲げやすいシリンダは、シリコンから形成される請求項61に記載の血液ポンプ。
- 前記曲げやすいシリンダは、複数の長手方向の孔を備え、前記孔のそれぞれは、前記電源ケーブルの1つを包含する請求項62に記載の血液ポンプ。
- 前記曲げやすいシリンダは、6つの前記孔を備える請求項63に記載の血液ポンプ。
- 前記空洞は、前記インペラの前記周縁部の周囲で、約90°だけ離隔して位置決めされる請求項54に記載の血液ポンプ。
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2007
- 2007-01-12 JP JP2008550412A patent/JP5155186B2/ja active Active
- 2007-01-12 CN CN201310285851.0A patent/CN103432637B/zh active Active
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- 2017-08-29 US US15/689,567 patent/US10731652B2/en active Active
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