JP6067606B2 - 回転式血液ポンプ - Google Patents
回転式血液ポンプ Download PDFInfo
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- JP6067606B2 JP6067606B2 JP2014035942A JP2014035942A JP6067606B2 JP 6067606 B2 JP6067606 B2 JP 6067606B2 JP 2014035942 A JP2014035942 A JP 2014035942A JP 2014035942 A JP2014035942 A JP 2014035942A JP 6067606 B2 JP6067606 B2 JP 6067606B2
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- impeller
- blood pump
- rotary blood
- pump
- blood
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/066—Floating-units
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
- A61M60/178—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—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
- A61M60/148—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 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
- A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
- A61M60/226—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having mainly radial components
- A61M60/232—Centrifugal pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/422—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/50—Details relating to control
- A61M60/592—Communication of patient or blood pump data to distant operators for treatment purposes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/818—Bearings
- A61M60/82—Magnetic bearings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/818—Bearings
- A61M60/824—Hydrodynamic or fluid film bearings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices
- A61M60/871—Energy supply devices; Converters therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/0633—Details of the bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0666—Units comprising pumps and their driving means the pump being electrically driven the motor being of the plane gap type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
- F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
- F04D29/0473—Bearings hydrostatic; hydrodynamic for radial pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/048—Bearings magnetic; electromagnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/2255—Special flow patterns flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
- Y10S415/90—Rotary blood pump
Description
適合性チタン合金または生体適合性セラミック材料から構成されてもよい。ポンプ構造は、チタンまたはチタンの合金から機械加工されてもよい。あるいは、カニューレを含むポンプ構造は、セラミック材料から完全に形成されてもよい。
以下に、本件出願の当初の特許請求の範囲に記載された発明を付記する。
[条項1] 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のテーパー状の領域は、前縁部分および後縁部分を有し、前記第1のテーパー状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のテーパー状の領域は、前記第1のテーパー状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のテーパー状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のテーパー状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。
[条項2] 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条項1に記載の血液ポンプ。
[条項3] 前記第1および第2のテーパー状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テーパー状である条項2に記載の血液ポンプ。
[条項4] 前記第1のテーパー状の領域は、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条項3に記載の血液ポンプ。
[条項5] 前記第2のテーパー状の領域は、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条項4に記載の血液ポンプ。
[条項6] 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条項5に記載の血液ポンプ。
[条項7] 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のテーパー状の領域のそれぞれを備える条項6に記載の血液ポンプ。
[条項8] 前記第2のテーパー状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条項7に記載の血液ポンプ。
[条項9] 前記第1のテーパー状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曲率半径は、約0.010インチ未満である条項8に記載の血液ポンプ。
[条項10] 前記チャネルの前記出口は、実質的に90°離隔される条項9に記載の血液ポンプ。
[条項11] 前記第1のテーパー状の領域のそれぞれのテーパー状の角度は、水平方向に対して1°未満である条項10に記載の血液ポンプ。
[条項12] 前記第1のテーパー状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のテーパー状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条項4に記載の血液ポンプ。
[条項13] 前記第1のテーパー状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インチより小さい条項1に記載の血液ポンプ。
[条項14] 前記第2のテーパー状の領域のそれぞれのテーパー状の角度は、前記水平方向に対して2〜4°の範囲内である条項13に記載の血液ポンプ。
[条項15] 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条項6に記載の血液ポンプ。
[条項16] 前記ハウジングは、セラミック材料から形成される条項1に記載の血液ポンプ。
[条項17]
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条項1に記載の血液ポンプ。
[条項18] 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条項1に記載の血液ポンプ。
[条項19] 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条項1に記載の血液ポンプ。
[条項20] 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条項1に記載の血液ポンプ。
[条項21] 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
接続される条項20に記載の血液ポンプ。
[条項22] 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条項21に記載の血液ポンプ。
[条項23] 前記曲げやすいシリンダは、シリコンから形成される条項22に記載の血液ポンプ。
[条項24] 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つを包含する条項23に記載の血液ポンプ。
[条項25] 前記曲げやすいシリンダは、6つの前記孔を備える条項24に記載の血液ポンプ。
[条項26] 前記第1のテーパー状の領域の前記後縁部分および前記第2のテーパー状の領域の前記前縁部分は、実質的に同一の高さである条項1に記載の血液ポンプ。
[条項27] 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のテーパー状の領域は、前縁部分および後縁部分を有し、前記第1のテーパー状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のテーパー状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。
[条項28] 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条項27に記載の血液ポンプ。
[条項29] 前記隆起した面エリアのそれぞれは、前記第1のテーパー状の領域の1つを備える条項28に記載の血液ポンプ。
[条項30] 前記第1のテーパー状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条項29に記載の血液ポンプ。
[条項31] 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のテーパー状の領域のそれぞれの前記後縁部分と同一平面である条項30に記載の血液ポンプ。
[条項32] 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条項31に記載の血液ポンプ。
[条項33] 前記覆いのそれぞれは、幅が約0.020インチである条項32に記載の血液ポンプ。
[条項34]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条項27に記載の血液ポンプ。
[条項35] 前記ハウジングは、セラミック材料から形成される条項27に記載の血液ポンプ。
[条項36] 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条項27に記載の血液ポンプ。
[条項37] 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条項27に記載の血液ポンプ。
[条項38] 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条項27に記載の血液ポンプ。
[条項39] 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条項27に記載の血液ポンプ。
[条項40] 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条項39に記載の血液ポンプ。
[条項41] 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条項40に記載の血液ポンプ。
[条項42] 前記曲げやすいシリンダは、シリコンから形成される条項41に記載の血液ポンプ。
[条項43] 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つを包含する条項42に記載の血液ポンプ。
[条項44] 前記曲げやすいシリンダは、6つの前記孔を備える条項43に記載の血液ポンプ。
[条項45] 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。
[条項46] 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条項45に記載の血液ポンプ。
[条項47] 前記壁部材のそれぞれは、1対の前記並んだ孔を備える条項46に記載の血液ポンプ。
[条項48] 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条項47に記載の血液ポンプ。
[条項49] 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条項48に記載の血液ポンプ。
[条項50]
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条項49に記載の血液ポンプ。
[条項51] 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条項46に記載の血液ポンプ。
[条項52] 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インチである条項50に記載の血液ポンプ。
[条項53] 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インチである条項52に記載の血液ポンプ。
[条項54] 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条項46に記載の血液ポンプ。
[条項55] 前記ハウジングは、セラミック材料から形成される条項45に記載の回転式血液ポンプ。
[条項56] 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条項45に記載の回転式血液ポンプ。
[条項57] 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条項45に記載の回転式血液ポンプ。
[条項58] 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条項45に記載の回転式血液ポンプ。
[条項59] 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条項45に記載の血液ポンプ。
[条項60] 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条項59に記載の血液ポンプ。
[条項61] 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条項60に記載の血液ポンプ。
[条項62] 前記曲げやすいシリンダは、シリコンから形成される条項61に記載の血液ポンプ。
[条項63] 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つを包含する条項62に記載の血液ポンプ。
[条項64] 前記曲げやすいシリンダは、6つの前記孔を備える条項63に記載の血液ポンプ。
[条項65] 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条項54に記載の血液ポンプ。
Claims (21)
- 回転式血液ポンプであって、前記回転式血液ポンプは、
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、回転軸に関して回転可能な電磁気的に駆動されるインペラと、
を備え、
前記インペラは、円形断面部分、及び各々がロータ磁石と適合している内方向キャビティを画定している複数のくり抜かれている隆起した本体を含んでいる空洞の内部空間を有し、
前記内方向キャビティは、前記空洞の内部空間内で、複数の内方向に突出している壁部材(48)によって分離されており、複数の前記壁部材は、実質的に水平のシェルフ表面(49)を有しており、
直径方向に対向している複数の壁部材は、ポンプの動作中、前記インペラの釣り合いのとれた均等な回転を確保するための1つまたは複数の釣り合い孔(56)を備えており、各々の釣り合い孔は、複数の前記シェルフ表面の1つに対して、一端で閉ざれており、内部に延びており、垂直であり、
前記インペラは、さらに、前記空洞の内部空間及びシェルフ表面を覆う基部板を備えており、前記シェルフ表面の内部へと延びている前記釣り合い孔が、前記空洞の内部空間内で前記基部板によって包囲されるようになっている、回転式血液ポンプ。 - 複数の前記ロータ磁石は、前記インペラを対応する電磁気的モータステータと磁気的に結合させるための永久磁石である、請求項1に記載の回転式血液ポンプ。
- 1つの内方向キャビティ内のロータ磁石は、1つのインペラ磁極を生成し、他の内方向キャビティ内のロータ磁石は、反対のインペラ磁極を生成する、請求項2に記載の回転式血液ポンプ。
- 一つおきのインペラ磁極は、同一の極性を有し、それらの間の複数のインペラ磁極は、対向する極性を有する、請求項3に記載の回転式血液ポンプ。
- 前記インペラは、77.6重量%の白金および22.4重量%のコバルトからなる強磁性の合金から構成される、請求項2に記載の回転式血液ポンプ。
- 少なくとも直径方向に対向している複数の水平のシェルフ表面は、各々、前記インペラの半径に沿って並んで位置付けられる1組の前記釣り合い孔を備えている、請求項1に記載の回転式血液ポンプ。
- 前記並んで位置付けられる1組の釣り合い孔は、前記回転軸の同じ側に前記インペラの直径に沿って整列している、請求項6に記載の回転式血液ポンプ。
- 複数の釣り合い孔の複数の前記組の、半径方向に最も外側の釣り合い孔の間の直径に沿った距離は、30.99mmである、請求項7に記載の回転式血液ポンプ。
- 複数の釣り合い孔の複数の前記組の、半径方向に最も内側の釣り合い孔の間の直径に沿った距離は、25.91mmである、請求項8に記載の回転式血液ポンプ。
- 複数の前記釣り合い孔は、略等しい直径を有する、請求項1に記載の回転式血液ポンプ。
- 複数の釣り合い孔の各組の、半径方向に最も外側の釣り合い孔の深さは、複数の釣り合い孔の各組の、半径方向に最も内側の釣り合い孔の深さよりも大きい、請求項6に記載の回転式血液ポンプ。
- 各釣り合い孔の縦軸は、前記インペラの回転軸に略平行に延出している、請求項1に記載の回転式血液ポンプ。
- 実質的に水平のシェルフ表面の各々の縁は、実質的に垂直に突出している複数の表面の境界を画定しており、前記実質的に垂直に突出している複数の表面の一つは、内向きに面する曲面を構成しており、前記曲面の半径の描く範囲は、前記インペラの周縁部と実質的に同心である、請求項6に記載の回転式血液ポンプ。
- 中空のシリンダが、軸方向に内向きに突出し、前記インペラの中心穴を画定する、請求項13に記載の回転式血液ポンプ。
- 前記中空のシリンダと内向きに面する曲面の各々との間に、環状空間を備える、請求項14に記載の回転式血液ポンプ。
- 前記環状空間の中にはリング形状のロータ磁石を備え、前記中空シリンダを包囲している、請求項15に記載の回転式血液ポンプ。
- 前記電磁気的モータステータは、前記インペラに近接しており、前記電磁気的モータステータは、曲げやすい細長いシリンダ内で保持される複数の電源ケーブルによって、電力を受け取るように構成されている、請求項2に記載の回転式血液ポンプ。
- 前記曲げやすい細長いシリンダは、複数の管腔を含み、複数の前記電源ケーブルの一つは、複数の前記管腔の各々を貫通して通っている、請求項17に記載の回転式血液ポンプ。
- 前記曲げやすい細長いシリンダは、6個の前記管腔を備えている、請求項18に記載の回転式血液ポンプ。
- 前記複数のくり抜かれている隆起した本体は、中空のチタンケーシングを備えている、請求項1に記載の回転式血液ポンプ。
- 前記複数の内方向に突出している壁部材の各々は、前記実質的に水平のシェルフ表面の内部に延びている1つまたは複数の前記釣り合い孔を備えている、請求項1に記載の回転式血液ポンプ。
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2007
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