JP5539441B2 - 回転式血液ポンプ - Google Patents
回転式血液ポンプ Download PDFInfo
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- JP5539441B2 JP5539441B2 JP2012116644A JP2012116644A JP5539441B2 JP 5539441 B2 JP5539441 B2 JP 5539441B2 JP 2012116644 A JP2012116644 A JP 2012116644A JP 2012116644 A JP2012116644 A JP 2012116644A JP 5539441 B2 JP5539441 B2 JP 5539441B2
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- impeller
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- blood
- blood pump
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- 239000008280 blood Substances 0.000 title claims description 182
- 210000004369 blood Anatomy 0.000 title claims description 182
- 239000012530 fluid Substances 0.000 claims description 68
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 12
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- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
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Images
Classifications
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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
-
- 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
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- A—HUMAN NECESSITIES
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- 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
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- 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
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- A—HUMAN NECESSITIES
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- 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
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- 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
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- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
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- A—HUMAN NECESSITIES
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- 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
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- A—HUMAN NECESSITIES
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- 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
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- A—HUMAN NECESSITIES
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- 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
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F04D13/0633—Details of the bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
-
- 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
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- 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
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- 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
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- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Heart & Thoracic Surgery (AREA)
- General Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Vascular Medicine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- External Artificial Organs (AREA)
Description
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。
[付記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***した面エリアを有し、
前記***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***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***した面エリアを横断する回転式血液ポンプ。
[付記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付記1に記載の血液ポンプ。
[付記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付記2に記載の血液ポンプ。
[付記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付記3に記載の血液ポンプ。
[付記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付記4に記載の血液ポンプ。
[付記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***した面エリアを備え、前記***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付記5に記載の血液ポンプ。
[付記7]
前記***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付記6に記載の血液ポンプ。
[付記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付記7に記載の血液ポンプ。
[付記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インチ未満である付記8に記載の血液ポンプ。
[付記10]
前記チャネルの前記出口は、実質的に90°離隔される付記9に記載の血液ポンプ。
[付記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°未満である付記10に記載の血液ポンプ。
[付記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付記4に記載の血液ポンプ。
[付記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インチより小さい付記1に記載の血液ポンプ。
[付記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°の範囲内である付記13に記載の血液ポンプ。
[付記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付記6に記載の血液ポンプ。
[付記16]
前記ハウジングは、セラミック材料から形成される付記1に記載の血液ポンプ。
[付記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付記1に記載の血液ポンプ。
[付記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付記1に記載の血液ポンプ。
[付記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付記1に記載の血液ポンプ。
[付記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付記1に記載の血液ポンプ。
[付記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付記20に記載の血液ポンプ。
[付記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付記21に記載の血液ポンプ。
[付記23]
前記曲げやすいシリンダは、シリコンから形成される付記22に記載の血液ポンプ。
[付記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つを包含する付記23に記載の血液ポンプ。
[付記25]
前記曲げやすいシリンダは、6つの前記孔を備える付記24に記載の血液ポンプ。
[付記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付記1に記載の血液ポンプ。
[付記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***した面エリアを有し、
前記***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。
[付記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***した面エリアを備え、前記***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付記27に記載の血液ポンプ。
[付記29]
前記***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つを備える付記28に記載の血液ポンプ。
[付記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付記29に記載の血液ポンプ。
[付記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付記30に記載の血液ポンプ。
[付記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付記31に記載の血液ポンプ。
[付記33]
前記覆いのそれぞれは、幅が約0.020インチである付記32に記載の血液ポンプ。
[付記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付記27に記載の血液ポンプ。
[付記35]
前記ハウジングは、セラミック材料から形成される付記27に記載の血液ポンプ。
[付記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付記27に記載の血液ポンプ。
[付記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付記27に記載の血液ポンプ。
[付記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付記27に記載の血液ポンプ。
[付記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付記27に記載の血液ポンプ。
[付記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付記39に記載の血液ポンプ。
[付記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付記40に記載の血液ポンプ。
[付記42]
前記曲げやすいシリンダは、シリコンから形成される付記41に記載の血液ポンプ。
[付記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つを包含する付記42に記載の血液ポンプ。
[付記44]
前記曲げやすいシリンダは、6つの前記孔を備える付記43に記載の血液ポンプ。
[付記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***した面エリアを有し、前記***した面エリアは、前記1つの***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。
[付記46]
前記インペラは、複数の前記***した面エリアと、前記***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付記45に記載の血液ポンプ。
[付記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付記46に記載の血液ポンプ。
[付記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付記47に記載の血液ポンプ。
[付記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付記48に記載の血液ポンプ。
[付記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付記49に記載の血液ポンプ。
[付記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付記46に記載の血液ポンプ。
[付記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インチである付記50に記載の血液ポンプ。
[付記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インチである付記52に記載の血液ポンプ。
[付記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付記46に記載の血液ポンプ。
[付記55]
前記ハウジングは、セラミック材料から形成される付記45に記載の回転式血液ポンプ。
[付記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付記45に記載の回転式血液ポンプ。
[付記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付記45に記載の回転式血液ポンプ。
[付記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付記45に記載の回転式血液ポンプ。
[付記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付記45に記載の血液ポンプ。
[付記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付記59に記載の血液ポンプ。
[付記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付記60に記載の血液ポンプ。
[付記62]
前記曲げやすいシリンダは、シリコンから形成される付記61に記載の血液ポンプ。
[付記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つを包含する付記62に記載の血液ポンプ。
[付記64]
前記曲げやすいシリンダは、6つの前記孔を備える付記63に記載の血液ポンプ。
[付記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付記54に記載の血液ポンプ。
Claims (14)
- 上部内面および下部内面を備え、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、軸に関して回転可能なインペラであって、前記インペラは、複数の離隔された***した本体を有し、前記***した本体の各々は、前記ポンプ室の前記上部内面に隣接した上部表面を有しているインペラと、
を備え、
前記インペラ上の各上部表面は、比較的低い流体圧力の入口、即ち前縁部分及び比較的高い流体圧力の出口、即ち後縁部分を有した流体力学的軸受面を画定するために、軸方向上方に傾いた傾斜表面領域を含んでおり、前記インペラが回転中であるときに、前記インペラに軸方向下向きに作用する圧力を増加させるようになっており、
前記インペラが回転中であるときに、比較的高い流体圧力の入口部分及び比較的低い流体圧力の出口部分を形成するために、下向き軸方向に傾斜した下流の縦に並んだ圧力緩和面を含んでおり、前記圧力緩和面の比較的高い流体圧力の入口部分は、前記流体力学的軸受面の比較的高い流体圧力の出口部分からは、それらの間にある平坦なブリッジ面によって離間している、回転式血液ポンプ。 - 少なくとも4つの前記***した本体を備え、前記***した本体の隣接した各々が、それらの間にある流体フロー経路によって離隔されており、流体フロー経路の各々は、前記インペラの周縁部に延在し、前記インペラの前記周縁部に出口を画定する、請求項1に記載の血液ポンプ。
- 各々の流体力学的軸受面の前記比較的低い流体圧力の前縁部分は、前記流体フロー経路の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2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。
- ***した本体の各々は、ほぼ90°で交差し、前記流体フロー経路の壁を画定する同一長さではない2つの直線状の側壁を有する、請求項2に記載の血液ポンプ。
- インペラの***した本体の長い方の側壁は、隣接するインペラの***した本体の短い方の側壁と交差して面し、それらの間に複数の前記流体フロー経路を画定する請求項8に記載の血液ポンプ。
- 前記平坦なブリッジ面は、その最も狭い点において、ほぼ0.050インチ幅である、請求項1に記載の血液ポンプ。
- 各々の前記圧力緩和表面の下方向への傾斜角度は、各々の流体力学的軸受面の上方向への傾斜角度よりもより大きい、請求項1に記載の血液ポンプ。
- 各々の前記圧力緩和表面は、水平方向に対して2〜4°の角度で傾斜しており、各々の流体力学的軸受面は、水平方向に対して1°未満である、請求項11に記載の血液ポンプ。
- ***した本体の各々は、内向きに面し、下向きにテーパー状の湾曲した内側境界を備えている、請求項1に記載の血液ポンプ。
- 各々の下向きにテーパー状の湾曲した内側境界に関する軸方向の降下は、ほぼ0.012インチであり、そのテーパー状の角度は、ほぼ8°である、請求項13に記載の血液ポンプ。
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US7779692B2 (en) * | 2006-05-17 | 2010-08-24 | The Board Of Regents Of The University Of Texas System | Method for estimating strain, strain ratios and displacements in a target body |
PE20142007A1 (es) * | 2008-06-13 | 2014-12-19 | Weir Minerals Australia Ltd | Un soporte para alojamiento de bomba |
US8523539B2 (en) * | 2008-06-19 | 2013-09-03 | The Board Of Regents Of The University Of Texas Systems | Centrifugal pump |
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