WO2007020972A1 - 人工心臓ポンプ - Google Patents
人工心臓ポンプ Download PDFInfo
- Publication number
- WO2007020972A1 WO2007020972A1 PCT/JP2006/316162 JP2006316162W WO2007020972A1 WO 2007020972 A1 WO2007020972 A1 WO 2007020972A1 JP 2006316162 W JP2006316162 W JP 2006316162W WO 2007020972 A1 WO2007020972 A1 WO 2007020972A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fixed
- fixed body
- magnetic field
- artificial heart
- heart pump
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D3/00—Axial-flow 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
- A61M60/20—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
- A61M60/237—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 axial components, e.g. axial flow 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
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/81—Pump housings
- A61M60/812—Vanes or blades, e.g. static flow guides
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- A61M60/80—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
Definitions
- the present invention relates to an artificial heart pump, and more particularly to an artificial heart pump using an axial flow pump that pumps blood.
- an artificial heart pump that pumps blood using rotation of an impeller has been used as a medical alternative or auxiliary heart.
- this artificial heart pump those using a roller pump or a centrifugal pump and those using an axial pump are provided.
- those using axial flow pumps can be smaller in size than those used for roller pumps or centrifugal pumps.
- a motor stator is included in a housing, and a permanent magnet that magnetically reacts with the motor stator is included in a rotor provided with an impeller around it.
- a rotor 104 having an impeller 105 on its outer peripheral surface is installed between fixed bodies 102 and 103 fixed to a housing 101.
- pivot bearings 106a and 106b are provided on the surface facing the rotor 104. That is, the pivot bearings 106a and 106b are formed by projecting the centers of the surfaces of the rotor 104 facing the fixed bodies 102 and 103.
- electromagnetic coils 111 and 112 for generating magnetic force are provided in the fixed bodies 102 and 103, and the rotor 104 is provided so as to oppose the electromagnetic coils 111 and 112.
- a magnetic bearing is provided that supports the rotor 104 by magnetic force.
- the position of the rotor 104 is detected by providing the fixed body 102 with the position sensor 115, and the current amounts of the electromagnetic coils 111 and 112 are adjusted so that the rotor 104 is in the optimum position.
- An active magnetic bearing is configured.
- fixed bodies 102 and 103 are connected by a fixed shaft 121, and the fixed shaft 121 is Provided with a rotor 122 that has a cylindrical shape that rotates along the circumference, and that has a groove on each surface where the rotor 122 and the fixed body 102, 103 face each other to form a hydrodynamic bearing Has been. That is, when the rotor 122 rotates, the dynamic pressure generated by the blood flowing into the minute gaps formed by the grooves provided on the surfaces where the rotor 122 and the fixed bodies 102 and 103 face each other causes the rotor 122 and Prevents contact with fixed bodies 102 and 103, and operates as a thrust bearing.
- the applicant of the present invention is a passive type repulsive magnetic bearing that uses a magnetic repulsive force that balances the load on the impeller that is required only by configuring the hydrodynamic bearing.
- Proposed an artificial heart pump that prevents contact between the rotor and the stationary body (see Patent Document 1).
- This artificial heart pump equipped with a passive repulsive magnetic bearing is provided with permanent magnets 1 31 and 132 as shown in FIG. 17 for each of the rotor 122 and the fixed body 103 in the configuration of FIG.
- a passive type repulsive magnetic bearing with a magnetic repulsive force commensurate with the hydrothrust load is constructed.
- an artificial heart pump in which permanent magnets are provided on each of a rotor and a stationary body before and after the rotor that is merely supported by a pivot bearing as shown in FIG. reference).
- this artificial heart pump two sets of magnetic repulsions are provided before and after the rotor by installing permanent magnets at positions facing the two fixed bodies of the rotor and positions facing the rotor of the two fixed bodies. By applying force, the rotor is suspended and supported.
- Patent Document 1 JP 2004-346930 A Patent Document 2: Japanese Patent Application Laid-Open No. 2004-351213
- the present invention provides an artificial heart pump that can easily determine the installation position of a permanent magnet in order to set the gap between the rotor and the fixed body to an optimum distance.
- the purpose is to do.
- an artificial heart pump of the present invention includes a housing, a fixed shaft fixed at a center position in the housing, and both ends of the fixed shaft connected to the housing.
- Two fixed bodies connected to the rotary shaft, a rotary shaft fitted to the fixed shaft, a plurality of impellers protruding from the outer wall surface force of the rotary shaft, and a position surrounding the rotary shaft in the housing.
- a motor stator that generates a rotating magnetic field; a polar anisotropic permanent magnet that is included in the rotating shaft and that generates a magnetic field perpendicular to an outer wall surface of the rotating shaft; and at least one of the fixed bodies.
- An adjustment unit for adjustment, and It is characterized by that.
- both ends of the rotating shaft are arranged so that the rotating shaft and the fixed body do not come into contact with each other.
- the repulsive magnetic force generated by the first and second repulsive magnetic bearing magnets can be easily adjusted.
- the adjustment part is composed of parts that move the installation position of the first repulsive magnetic bearing magnet in the fixed body, so that the first and second repulsive magnetic bearing magnets can be changed without changing the distance between the fixed bodies.
- the repulsive magnetic force can be easily adjusted.
- the repulsive magnetic force generated at both ends of the rotating shaft can be easily adjusted by configuring the adjusting portion with the parts installed between the fixed shaft and the fixed body.
- FIG. 1 is a cross-sectional view showing a configuration of an artificial heart pump according to a first embodiment.
- FIG. 2 is a cross-sectional view showing a configuration of an artificial heart pump according to a second embodiment.
- FIG. 3 is a cross-sectional view showing a configuration of an artificial heart pump according to a third embodiment.
- FIG. 4A is a diagram showing another configuration of the current plate and the diffuser in the artificial heart pumps of the first to third embodiments.
- FIG. 4B is a diagram showing another configuration of the current plate and the diffuser in the artificial heart pump according to the first to third embodiments.
- FIG. 4C is a diagram showing another configuration of the current plate and the diffuser in the artificial heart pump according to the first to third embodiments.
- FIG. 4D is a diagram showing another configuration of the rectifying plate and the diffuser in the artificial heart pump according to the first to third embodiments.
- FIG. 5A is a diagram showing another configuration of a fixed body and a fixed shaft in the artificial heart pumps of the first to third embodiments.
- FIG. 5B is a diagram showing another configuration of a fixed body and a fixed shaft in the artificial heart pumps of the first to third embodiments.
- FIG. 6 is a cross-sectional view showing a configuration of an artificial heart pump according to a fourth embodiment.
- FIG. 7 is a cross-sectional view showing another configuration of the artificial heart pump according to the fourth embodiment.
- FIG. 8 is a cross-sectional view showing another configuration of the artificial heart pump according to the fourth embodiment.
- FIG. 9 is a cross-sectional view showing a configuration of an artificial heart pump according to a fifth embodiment.
- FIG. 10 is a cross-sectional view showing another configuration of the artificial heart pump according to the fifth embodiment.
- FIG. 11 is a cross-sectional view showing another configuration of the artificial heart pump according to the fifth embodiment.
- FIG. 12 is a diagram showing a configuration of a thrust dynamic pressure generating groove.
- FIG. 13 is a diagram showing a configuration of an artificial heart pump when a thrust dynamic pressure generating groove is provided in a fixed body on the rear side.
- FIG. 14 is a cross-sectional view showing a configuration of a conventional artificial heart pump using a pivot bearing.
- FIG. 15 is a cross-sectional view showing a configuration of a conventional artificial heart pump using an active magnetic bearing.
- FIG. 16 is a cross-sectional view showing a configuration of a conventional artificial heart pump using a dynamic pressure bearing.
- FIG. 17 is a cross-sectional view showing a configuration of a conventional artificial heart pump using a passive repulsive magnetic bearing.
- FIG. 1 is a cross-sectional view showing the configuration of the artificial heart pump in the present embodiment.
- the front (upstream side) and the rear (downstream side) are described according to the blood flow.
- the artificial heart pump shown in FIG. 1 has a cylindrical housing 1, a plurality of diffusers 2 joined to the inner wall surface of the housing 1, and a plurality of diffuser 2 also projecting the outer wall surface force.
- a fixed body 3 supported by the fixed body 3 a fixed shaft 4 installed in front of the fixed body 3, a sleeve 5 installed so as to be wrapped around the fixed shaft 4 and rotating around the outer periphery of the fixed shaft 4, and a sleeve
- the outer wall force of 5 A plurality of projecting impellers 6, a plurality of rectifying plates 7 provided in front of the impeller 6 and joined to the inner wall surface of the housing 1, and connected to the fixed shaft 4 and the rectifying plate 7
- the outer wall force protrudes, and a fixed body 8 supported by the housing 1 by this is provided.
- This artificial heart pump is provided with a polar anisotropic permanent magnet 5a in the sleeve 5 and a motor stator la comprising an electromagnetic coil whose magnetic pole faces the outer wall surface of the sleeve 5 inside the housing 1.
- a plurality of polar anisotropic permanent magnets 5a are provided radially about the central axis X of the artificial heart pump, and the direction of the magnetic flux is perpendicular to the inner wall surface of the housing 1.
- the magnetic poles facing the inner wall surface of the housing 1 of the adjacent polar anisotropic permanent magnet 5a are set to the opposite polarity.
- the rotating power acts on the polar anisotropic permanent magnet 5a, and the sleeve 5 and the impeller 6 rotate as a motor rotor.
- the ring-shaped permanent magnet 5b is included in the front end portion of the sleeve 5, and the rear surface faces the front surface of the permanent magnet 5b in the fixed body 8.
- a permanent magnet 8a is included.
- the magnetic repulsive force of the permanent magnets 5b and 8a acts.
- a ring-shaped permanent magnet 5c is included in the rear tip portion of the sleeve 5, and a permanent magnet 3a whose front surface is opposed to the rear surface of the permanent magnet 5c is included in the fixed body 3. Is done.
- the permanent magnets 5b, 8a and the permanent magnets 5c, 3a function as thrust bearings with respect to the axial direction of the central axis X, and magnetic repulsive forces by the permanent magnets 5b, 8a and the permanent magnets 5c, 3a, respectively, are artificial heart pumps. As the pressure behind the impeller 6 increases during the driving, the sleeve 5 is adjusted to balance the hydrothrust load, which is the force that moves the sleeve forward.
- rectifying plates 7 having both edges joined to the outer wall surface of the fixed body 8 and the inner wall surface of the housing 1 are arranged at equal intervals in the circumferential direction about the central axis X.
- the fixed body 3 Diffusers 2 having both edges joined to the outer wall surface of the housing 1 and the inner wall surface of the housing 1 are arranged at equal intervals around the central axis X in the circumferential direction.
- Each of the front end of the fixed body 8 and the rear end of the fixed body 3 has a raised central portion. Therefore, the blood taken in by the ridge at the front end of the fixed body 8 is branched without resistance and guided to the rectifying plate 7, and the blood rectified by the diffuser 2 by the ridge at the rear end of the fixed body 3 is joined without resistance. Lead.
- the fixed bodies 3 and 8 and the fixed shaft 4 are respectively connected to the end surfaces 3x and 4b of the fixed bodies 3 and 8 in the holes 4a and 4b provided at the center positions of both end faces 4x and 4y of the fixed shaft 4, respectively.
- the projections 3b and 8b provided at the center positions of the respective 8x are connected by being inserted.
- Each of the holes 4a and 4b and the protrusions 3b and 8b are formed in a threaded shape, and the protrusions 3b and 8b are rotated and inserted into the holes 4a and 4b, so that the fixed shaft around which the sleeve 5 is mounted is fixed.
- Fixed bodies 3 and 8 are fixed to 4.
- An adjustment ring 9 is installed to adjust the gap between the front end surface 5y of the sleeve 5 and the front end surface 8x of the fixed body 8 between the rear end surface 8x of the fixed body 8 and the front end surface 4y of the fixed shaft 4. More than one adjustment ring 9 is installed. At this time, the adjustment ring 9 is mounted on the protrusions 3b and 8b of the fixed bodies 3 and 8, respectively. By inserting the fixed bodies 3 and 8 in which the adjustment ring 9 is mounted on the fixed shaft 4, the gap between the fixed bodies 3 and 8 and the sleeve 5 is adjusted.
- the gap sensor 10 may be installed only on one of the fixed bodies 3 and 8. That is, when the gap sensor 10 is installed inside the fixed body 3, the gap between the fixed body 3 and the sleeve 5 is measured by the gap sensor 10. Then, the gap between the fixed body 8 and the sleeve 5 is determined by the measured gap between the fixed body 3 and the sleeve 5, the number of the adjusting rings 9 installed, and the axial lengths of the fixed shaft 4 and the sleeve 5. Is required.
- the gap between the fixed bodies 3, 8 and the sleeve 5 is set to an appropriate distance using the adjustment ring 9, the fixed body 3 or the fixed body 8 is removed from the fixed shaft 4, and then the fixed body The gap sensor 10 included in either 3 or the fixed body 8 may be removed. Then, the fixed bodies 3 and 8 in which the confirmed number of adjustment rings 9 are mounted on the protrusions 3b and 8b are reconnected to the fixed shaft 4 in which the sleeve 5 is mounted. The gap between the fixed bodies 3 and 8 and the sleeve 5 is measured by measuring the external force of the contact between the fixed bodies 3 and 8 and the sleeve 5 without using the gap sensor 10. It ’s okay.
- both of the fixed bodies 3 and 8 are provided with protrusions 3b and 8b, and the forces 4a and 4b are provided on both end faces 4x and 4y of the fixed shaft 4.
- 8 may be provided with a projecting portion, and a hole may be provided in the end surface of the fixed shaft 4 on the side to which the fixed body having the projecting portion is connected.
- the hole 4a is provided only in the end surface 4x of the fixed shaft 4 and the end surface 4y
- the hole 4b is formed in the end surface 4y of the fixed shaft 4.
- the end face 4x is directly connected to the end face 3x of the fixed body 3.
- FIG. 2 is a cross-sectional view showing the configuration of the artificial heart pump in the present embodiment.
- the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the artificial heart pump shown in FIG. 2 has a configuration in which the permanent magnets 5c and 3a are omitted from the configuration of the artificial heart pump shown in FIG. 1, and the adjustable configuration by the adjusting ring 9 is only on the fixed body 8 side. That is, the gap between the fixed bodies 3 and 8 and the sleeve 5 is adjusted by the number and thickness of the adjusting rings 9 mounted on the protrusions 8b included in the fixed body 8, so that under the operating conditions to be used, In order for the permanent magnets 5b and 8a to function as thrust bearings, the magnetic repulsive force of the permanent magnets 5b and 8a is adjusted so as to balance with the idle loss load.
- the fixed shaft 4 is connected to the fixed body 2 fixed to the winging 1 by being connected to the inner edge of the diffuser 2 whose outer edge is connected to the housing 1.
- the fixed shaft 4 is fixed to the housing 1 via the fixed body 2.
- the fixed body 8 in which the adjustment ring 9 is mounted on the protrusion 8b is connected to the fixed shaft 4 so that the protrusion 8b is inserted into the hole 4b of the fixed shaft 4.
- the adjustment ring 9 is installed between the fixed shaft 4 and the fixed body 8, and the distance between the fixed bodies 3 and 8 is adjusted, so that the fixed bodies 3 and 8 and the sleeve can be used under the operating conditions to be used.
- the gap between the fixed bodies 3 and 8 and the sleeve 5 is adjusted so that 5 does not contact.
- the fixed body 8 side including the permanent magnet 8a functioning as a thrust bearing is adjustable.
- the fixed body 3 side having no permanent magnet may be adjustable. Absent. That is, by providing the protrusion 3b on the fixed body 3 and providing the hole 4a on the end face 4x of the fixed shaft 4, the adjustment ring 9 wrapped around the protrusion 3b allows the gap between the fixed bodies 3, 8 and the sleeve 5 to be It does not matter as a thing to adjust.
- FIG. 3 shows the present embodiment. It is sectional drawing which shows the structure of the artificial heart pump.
- FIG. 3 the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the artificial heart pump shown in Fig. 3 has a magnetic body 3c installed at the installation position of the permanent magnet 3a instead of the permanent magnets 3a, 5b, 5c, 8a in the configuration of the artificial heart pump shown in Fig. 1.
- the suction force generated by the polar anisotropic permanent magnet 5a is used as the function of the thrust bearing, and the adjustable structure by the adjustment ring 9 is limited to the fixed body 3 side. That is, the gap between the fixed bodies 3 and 8 and the sleeve 5 is adjusted by the number and thickness of the adjusting rings 9 mounted on the protrusion 3b included in the fixed body 3, so that the magnetic body 3c can be used under the operating conditions to be used.
- the polar anisotropic permanent magnet 5a and the force S are adjusted so as to balance the attractive force S of the magnetic body 3c and the polar anisotropic permanent magnet 5a and the hydrothrust load so as to function as an S thrust bearing.
- the fixed shaft 4 is connected to the fixed body 8 fixed to the housing 1 by being connected to the inner edge of the rectifying plate 7 having the outer edge connected to the housing 1.
- the fixed shaft 4 is fixed to the housing 1 via the fixed body 8.
- the fixed body 3 in which the adjustment ring 9 is mounted on the protruding portion 3 b is connected to the fixed shaft 4 so that the protruding portion 3 b is inserted into the hole 4 a of the fixed shaft 4.
- the adjustment ring 9 is installed between the fixed shaft 4 and the fixed body 8, and the distance between the fixed bodies 3 and 8 is adjusted, so that the fixed bodies 3 and 8 and The gap between the fixed bodies 3, 8 and the sleeve 5 is adjusted so that the sleeve 5 does not come into contact.
- the fixed body 3 side including the magnetic body 3c functioning as a thrust bearing is adjustable, but the fixed body 8 side without the magnetic body may be adjustable. Absent. That is, the protrusion 8b is provided on the fixed body 8, and the hole 4b is provided on the end face 4y of the fixed shaft 4, so that the gap between the fixed bodies 3 and 8 and the sleeve 5 is reduced by the adjustment ring 9 that is wrapped around the protrusion 8b. It does not matter as a thing to adjust.
- both the diffuser 2 and the current plate 7 are connected to the outer wall surfaces of the fixed bodies 3 and 8, and the outer edge is connected to the inner wall surface of the housing 1. Any one of the diffuser 2 and the rectifying plate 7 may be connected and fixed on one of the inner edge or the outer edge.
- the inner edge may be connected and fixed to the fixed body 8 and the outer edge of the rectifying plate 7 may be separated, and the outer edge of the rectifying plate 7 is connected and fixed to the nosing 1 as shown in FIG.
- the inner edge of the plate 7 may be separated.
- the inner edge of the diffuser 2 is connected and fixed to the fixed body 3, and the outer edge of the diffuser 2 is separated.
- the outer edge of the diffuser 2 may be connected and fixed to the nosing 1 and the inner edge of the diffuser 2 may be separated.
- the force is configured such that the protrusion 8b is provided on the fixed body 8 and inserted into the hole 4a of the fixed shaft 4 to be fixed.
- the protrusion 4c is provided at the center position of the end face 4y on the fixed body 8 side of the fixed shaft 4, and the hole 8c into which the protrusion 4c is inserted is provided at the center position of the rear end face 8x of the fixed body 8. It does n’t matter.
- the adjustment ring 9 is mounted on the protrusion 4c and inserted into the hole 8c.
- the protrusion 4d is provided at the center position of the end surface 4x of the fixed shaft 4 on the fixed body 3 side.
- the hole 3d into which the protrusion 4d is inserted may be provided at the center position of the front end surface 3x of the fixed body 3.
- the adjustment ring 9 is mounted on the protrusion 4d and inserted into the hole 3d.
- FIG. 6 is a cross-sectional view showing the configuration of the artificial heart pump in the present embodiment.
- the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the artificial heart pump shown in FIG. 6 has a structure in which each of the fixed bodies 3 and 8 can be divided into a plurality of parts. Instead of being installed between the fixed shaft 4 and the fixed body 3, 8, a spacer 11 for determining the installation position of each of the permanent magnets 3 a and 8 a is used.
- 3 is composed of a fixed body part 31 having a diffuser 2 installed on the outer peripheral surface, and a discharge cone 32 which is inserted into the fixed body part 31 and has a raised rear end portion.
- the fixed body part 81 is provided with the current plate 7 and the suction cone 82 is inserted into the fixed body part 81 and the front end portion is raised.
- the fixed body component 31 has a structure in which the rear end face force is also directed forward and the inside thereof is shaved stepwise, that is, a hole 33 having a large inner diameter is formed on the rear end face side.
- a hole 34 having an inner diameter smaller than that of the hole 33 is formed on the bottom surface of the hole 33.
- a ring-shaped groove 35 is formed around the hole 34 at the bottom surface portion of the hole 33, and the spacer 11 and the permanent magnet 3a are inserted into the ring-shaped groove 35 and installed. Further, the gap sensor 10 is installed between the bottom surface of the hole 34 and the front end surface 3x of the fixed member 31.
- the discharge cone 32 has a protrusion 36 inserted into the hole 34, and an outer diameter that is inserted into the hole 33 on the rear side of the protrusion 36 and substantially equal to the inner diameter of the hole 33.
- the fixed member 81 has a stepped structure in which a hole 83 with a large inner diameter and a hole 84 with a small inner diameter are formed from the front end face to the rear, and the bottom surface of the hole 83 In the portion, a ring-shaped groove 85 is formed around the hole 84. Then, the spacer 11 and the permanent magnet 8a are inserted into the groove 85, and the gap sensor 10 is installed between the bottom surface of the hole 84 and the rear end surface 8x of the fixed body 81. Further, the suction cone 82 is fitted into the projection 88 and the cylindrical portion 87 inserted into the holes 84 and 83, a groove 88 formed in a part of the outer wall surface of the cylindrical portion 87, and the groove 88, respectively.
- the hole 84 of the fixed body part 81 and the protrusion 86 of the suction cone 82 are each threaded, and the protrusion 86 is rotated and inserted into the hole 84, and the suction cone 82 is inserted into the fixed body part 81. Is installed.
- the fixed bodies 3 and 8 are formed, after the fixed body parts 31 and 81 are connected to the rotating shaft 4 around which the sleeve 5 is mounted, the fixed body parts 31 and 81 respectively.
- the groove 35, 85 A plurality of spacers 11 and permanent magnets 3a and 8a are inserted.
- the depth of the groove 35 with respect to the axial direction of the central axis X is equal to the total length of the plurality of spacers 11 and permanent magnets 3a inserted into the groove 35 with respect to the axial direction of the central axis X.
- the depth of the groove 85 with respect to the axial direction of the central axis X is equal to the total length of the spacers 11 and permanent magnets 8a inserted into the groove 85 with respect to the axial direction of the central axis X. ,.
- the protrusions 36 of the discharge cone 32 are inserted into the holes 34 of the fixed body part 31 in which the spacer 11 and the permanent magnet 3a are installed so as to fit into the respective thread grooves, and the fixed body Fix the discharge cone 32 to the part 31.
- the fixed body part 81 in which the spacer 11 and the permanent magnet 8a are installed is inserted into the hole 84 of the fixed body part 81 so that the projection 86 of the suction cone 82 fits into the respective screw grooves. Secure suction cone 82 to 81.
- the gap between the inner wall surface of the stationary part 31 and the outer wall surface of the discharge cone 32 is sealed by the O-ring 39 installed in the groove 38 in the cylindrical portion 37 of the discharge cone 32, and the cylinder of the suction cone 82
- the gap between the inner wall surface of the stationary part 81 and the outer wall surface of the suction cone 82 is sealed by the O-ring 89 installed in the groove 88 in the portion 87. This prevents blood from flowing into the fixed bodies 3 and 8.
- the distance between the permanent magnets 3a and 5c is set by the number of the spacers 11 installed in front of the permanent magnet 3a, and the magnetic repulsion by the permanent magnets 3a and 5c.
- the distance between the permanent magnets 8a and 5b is set by the number of spacers 11 installed behind the permanent magnet 8a, and the magnetic repulsive force by the permanent magnets 8a and 5b is determined.
- the discharge cone 32 and the suction cone 82 are again used for the stationary body after the gap sensor 10 is removed from the stationary body parts 31 and 81, respectively.
- O-phosphorus instead of installing the grooves 39, 89, the space by the groove 38 of the discharge cone 32 and the inner wall surface of the fixing part 31 is welded, and the space by the groove 88 of the suction cone 82 and the inner wall surface of the fixing part 81 is welded.
- the inside of the fixed bodies 3 and 8 is sealed by welding.
- the gap sensor 10 is installed in each of the fixed body parts 31 and 81.
- the gap sensor 10 is installed only in one of the fixed body parts 31 and 81. It does not matter as a thing. That is, when the gap sensor 10 is installed inside the fixed body part 31, the gap between the fixed body 3 and the sleeve 5 is measured by the gap sensor 10. Then, the gap between the fixed body 8 and the sleeve 5 is determined by the measured gap between the fixed body 3 and the sleeve 5 and the axial lengths of the fixed shaft 4 and the sleeve 5.
- the contact between the fixed bodies 3 and 8 and the sleeve 5 which is not measured by the gap sensor 10 may be externally measured. I do not care.
- the installation positions of the permanent magnets 3a and 8a can be easily adjusted by the spacer 11, and the permanent magnets 3a, 8a, 5b, and 5c work. Thrust force can be easily adjusted. Further, in this embodiment, unlike the first embodiment, the front end face 3x of the fixed body 3 and the fixed body are changed in order to change the installation position of the permanent magnets 3a, 8a inside the fixed bodies 3, 8. The thrust force can be adjusted while keeping the distance from the rear end face 8x of 8 constant.
- the permanent magnets 3a, 8a, 5b, 5c are provided and the positions of the permanent magnets 3a, 8a can be adjusted by both the fixed bodies 3, 8, but the fixed bodies 3, A configuration in which only one of the positions can be adjusted may be adopted.
- the constituent force of the artificial heart pump shown in FIG. 6 is also configured such that the permanent magnets 5c and 3a are omitted, and the adjustable structure by the spacer 11 is used. May be used only on the fixed body 8 side.
- a magnetic body 3c is provided instead of the permanent magnets 3a, 8a, 5b, 5c having the configuration of the artificial heart pump of FIG. It is possible to adjust the position of the magnetic body 3c by adjusting the adjustable structure by only the fixed body 3 side.
- FIG. 9 is a cross-sectional view showing the configuration of the artificial heart pump in the present embodiment.
- parts that are the same as those in FIG. 6 are given the same reference numerals, and detailed descriptions thereof are omitted.
- the artificial heart pump shown in Fig. 9 is different from the artificial heart pump shown in Fig. 6 in the structure of the fixed bodies 3 and 8, and the screws that are used to set the installation positions of the permanent magnets 3a and 8a by the spacer 11 are used.
- the installation position of the permanent magnets 3a and 8a is set by the adjustment lot 12 equipped with a part.
- the stationary body 3 includes a stationary body part 301 having an opening on the rear side, a discharge cone stationary part 302 to be inserted into an opening on the rear side of the stationary body part 301, and a stationary discharge cone.
- a discharge cone tip 303 to be inserted into a hole provided in the portion 302, and an adjustment lot 12 to which a permanent magnet 3a is connected.
- the fixed body 8 includes a fixed body part 801 having an opening on the front side, a suction cone stationary part 802 inserted into the opening of the fixed body part 801, and a suction cone stationary part 802.
- Each of the fixed body parts 301 and 801 has a cylindrical shape
- the fixed body part 301 has a bottom surface on the front side
- the fixed body part 801 has a bottom surface on the rear side.
- the discharge cone stationary part 302 inserted into the opening on the rear side of the fixed body part 301 has a fixed part whose outer diameter is inserted into the opening of the fixed body part 301 on the front side.
- the outer diameter of the portion that is substantially equal to the inner diameter of the opening of 301 and that is not inserted into the opening of the stationary part 301 is the same as the outer diameter of the stationary part 301.
- the discharge cone stationary portion 302 is welded at a portion in contact with the end face of the opening of the fixed member 301 so as to be integrated with the fixed member 301.
- the discharge cone stationary portion 302 has a structure curved toward the center on the rear side thereof, and is flat in the vicinity of the center position so as to come into contact with the front end surface of the discharge cone tip portion 303.
- An end face 304 is formed.
- the discharge cone stationary portion 302 is formed with a hole penetrating in the axial direction of the center axis X. The discharge cone tip 303 is inserted from the rear side of the hole, and the front side force of the hole is also adjusted. Is inserted.
- the discharge cone tip end portion 303 has a structure in which the rear portion is bent toward the center and curved, and the center portion is raised, and a protruding portion 307 is provided at the front portion, and this protruding portion 307 is the discharge cone stationary portion 3. 02 is inserted into the hole. Furthermore, a ring-shaped groove 305 is provided on the end face 304 of the rear portion of the discharge cone stationary portion 302, and an elastic O-ring 306 is fitted into the groove 305, so that the discharge cone tip 303 and the discharge cone A seal is made at the contact surface of the stationary part 304.
- the suction cone stationary portion 802 has a structure that is curved toward the center on the front side thereof, and has a flat end surface 804 near the center position. A hole penetrating in the axial direction of axis X is formed.
- the suction cone tip 803 is provided with a protruding portion 807 protruding at the rear portion, like the discharge cone tip 303, and this protruding portion 807 is inserted into the hole of the suction cone stationary portion 802.
- a ring-shaped groove 805 is provided on the end surface 804 of the suction cone stationary portion 802, and an O-ring 806 made of an elastic body is fitted in the groove 805.
- the adjustment lot 12 into which the hole in the front of the discharge cone stationary part 302 and the hole in the rear of the suction cone stationary part 802 are also inserted has two cylindrical structures 121 and 122 having different diameters in the stop axis X direction.
- the diameter of the cylindrical structure 121 on the side inserted into the discharge cone stationary part 302 and the suction cone stationary part 802 is approximately equal to the inner diameter of the holes of the discharge cone stationary part 302 and the suction cone stationary part 802. .
- the diameter of the cylindrical structure 122 surrounded by the fixed body parts 301 and 801 is larger than the diameter of the cylindrical structure 121.
- the permanent magnets 3a, 8a are installed in the adjustment lot 12 so that the inner peripheral surfaces of the permanent magnets 3a, 8a are in contact with the outer peripheral surface of the cylindrical structure 122.
- the holes of the discharge cone stationary portion 302 and the suction cone stationary portion 802, the projection cone tips 307 and 807 of the discharge cone tip portion 303 and the suction cone tip portion 803, respectively, and the column structure 121 of the adjustment lot 12 are provided.
- Each has a threaded shape. Therefore, the protrusion 307 and the cylindrical structure 121 are rotated and inserted into the hole of the discharge cone stationary portion 302, so that the discharge cone tip 303 and the adjustment lot 12 are fixed to the discharge cone stationary portion 302, and the suction The protrusion 807 and the columnar structure 121 are rotated and inserted into the hole of the cone stationary part 802, so that the suction cone tip 803 and the adjustment lot 12 are fixed to the suction cone stationary part 802.
- the permanent magnet 3a is installed in a closed space constituted by the fixing part 301 and the discharge cone stationary part 302, and the permanent magnet 8a is constituted by the fixing part 801 and the suction cone stationary part 802. Installed in a closed space.
- the gap between the measured fixed bodies 3, 8 and the sleeve 5 is measured.
- the installation positions of the permanent magnets 3a and 8a are set so that the distance is optimum.
- the discharge cone tip 303 and the suction cone tip 803 are removed from the discharge cone stationary portion 302 and the suction cone stationary portion 802, respectively.
- the tool is inserted from the holes of the discharge cone stationary portion 302 and the suction cone stationary portion 802, and the adjustment lot 12 is rotated by the tool to move the adjustment lot 12 in the axial direction of the central axis X.
- the installation positions of the permanent magnets 3a and 8a are set.
- a groove having the same shape as the tip shape of the tool is formed on the end surface 123 of the cylindrical structure 121 of the adjustment lot 12, and the adjustment lot 12 is rotated by inserting the tip of the tool into the groove.
- the adjustment lot 12 and the inner wall surface of the hole of the discharge cone stationary portion 302 are fixed by welding or an adhesive, and the adjustment lot 12 and the suction are fixed.
- the adjustment lot 12 is stopped and fixed.
- the discharge cone tip 303 and the suction cone tip 803 are inserted into the discharge cone stationary part 302 and the suction cone stationary part 802 again.
- the discharge cone stationary part 3 Welded the space between the groove 305 of 02 and the front surface of the discharge cone tip 303 and welded the space of the groove 805 of the suction cone stationary portion 802 and the surface of the suction cone tip 803 on the rear side to fix the fixed body. 3 and 8 are sealed.
- the installation positions of the permanent magnets 3a and 8a can be easily adjusted using a tool.
- the gap sensor 10 is installed on at least one of the fixed body parts 301 and 801, and is used for measuring the gap between the fixed bodies 3 and 8 and the sleeve 5 during the test run. It does n’t matter. Further, the contact between the fixed bodies 3 and 8 and the sleeve 5 which are not caused by the gap sensor 10 may be externally measured.
- the permanent magnets 3a, 8a, 5b, and 5c are provided, and the positions of the permanent magnets 3a and 8a can be adjusted by both the fixed bodies 3 and 8.
- the configured force may be configured such that only one of the fixed bodies 3 and 8 can be adjusted in position.
- the configuration of the artificial heart pump shown in FIG. 9 is omitted from the permanent magnets 5c and 3a, and the adjustable configuration by the adjustment lot 12 is fixed. It does not matter if it is only on the body 8 side.
- a magnetic body 3c is provided instead of the permanent magnets 3a, 8a, 5b, 5c of the configuration of the artificial heart pump of FIG. The position of the magnetic body 3c may be adjusted with the possible configuration only on the fixed body 3 side.
- the protrusions 3b and 8b are formed on the fixed bodies 3 and 8 at the connection portion between the fixed bodies 3 and 8 and the fixed shaft 8.
- the fixing shaft 4 may be provided with holes 4a and 4b, and the adjustment rings 9 may be mounted on the protrusions 3b and 8b of the fixing bodies 3 and 8, respectively.
- holes 3d and 8c are provided in the fixed bodies 3 and 8, and protrusions 4c and 4d are provided in the fixed shaft 4, and adjustment rings are provided in the protrusions 4c and 4d of the fixed shaft 4. It does not matter if 9 is wrapped around. In this way, the distance between the fixed bodies 3 and 8 can be adjusted using the adjustment ring 9.
- the spiral thrust as shown in FIG. 12 is provided on each of the front end surface 3X of the fixed body 3 and the rear end surface 8x of the fixed body 8.
- a plurality of dynamic pressure generating grooves 100 may be formed. That is, in this thrust dynamic pressure generating groove 100 Thrust dynamic pressure is generated in the flowing blood, and the thrust load applied to the sleeve 5 is supported together with the magnetic repulsive force by the permanent magnets 3a, 5b, 5c, 8a.
- a thrust dynamic pressure generating groove 100 as shown in FIG. 12 is formed only on the front end face 8x of the fixed body 8.
- the hardness of the material constituting the fixing member fixed to 1 may be different. That is, for example, the material constituting the rotating member may be carbonitrided titanium alloy, and the material constituting the fixing member may be an untreated titanium alloy. Conversely, the material constituting the rotating member may be In addition to an untreated titanium alloy, the material constituting the fixing member may be a carbonitrided titanium alloy.
- Carbonitriding means heating the treated product in a gas atmosphere in which ammonia (NH3) is added to a carburizing gas generated by dropping a modified carburizing gas or liquid such as natural gas, city gas, propane, or butane gas. It is what you do.
- NH3 ammonia
- the fixing member and the rotating member are made of materials having different hardnesses, seizure at the time of contact can be prevented, and the sliding characteristics can be kept good.
- a titanium alloy as the material used for each part, it is possible to produce titanium alloys with different hardness by processing by carbonitriding that only compensates for its biocompatibility, so that the temperature atmosphere during processing The thermal deformation of the member to be processed can be suppressed.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Heart & Thoracic Surgery (AREA)
- General Engineering & Computer Science (AREA)
- Hematology (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- External Artificial Organs (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/918,906 US8167589B2 (en) | 2005-08-19 | 2006-08-17 | Artificial heart pump with adjustable magnetic thrust bearing |
DE112006001464T DE112006001464T5 (de) | 2005-08-19 | 2006-08-17 | Künstliche Herzpumpe |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-238909 | 2005-08-19 | ||
JP2005238909 | 2005-08-19 | ||
JP2005265686A JP4176753B2 (ja) | 2005-08-19 | 2005-09-13 | 人工心臓ポンプ |
JP2005-265686 | 2005-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007020972A1 true WO2007020972A1 (ja) | 2007-02-22 |
Family
ID=37757629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/316162 WO2007020972A1 (ja) | 2005-08-19 | 2006-08-17 | 人工心臓ポンプ |
Country Status (4)
Country | Link |
---|---|
US (1) | US8167589B2 (ja) |
JP (1) | JP4176753B2 (ja) |
DE (1) | DE112006001464T5 (ja) |
WO (1) | WO2007020972A1 (ja) |
Cited By (2)
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JP2008237665A (ja) * | 2007-03-28 | 2008-10-09 | Mitsubishi Heavy Ind Ltd | 人工心臓ポンプ |
CN105477706A (zh) * | 2016-01-14 | 2016-04-13 | 山东大学 | 双定子混合支承人工心脏泵 |
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JP4209412B2 (ja) | 2005-09-13 | 2009-01-14 | 三菱重工業株式会社 | 人工心臓ポンプ |
JP4523961B2 (ja) * | 2007-11-26 | 2010-08-11 | 三菱重工業株式会社 | 人工心臓ポンプ |
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US9138518B2 (en) * | 2011-01-06 | 2015-09-22 | Thoratec Corporation | Percutaneous heart pump |
JP7145585B2 (ja) | 2014-02-28 | 2022-10-03 | プロジェクト・フェニックス・エルエルシー | ポンプ、及び流体をポンプの第1のポートから第2のポートへ移動させる方法 |
US10465721B2 (en) | 2014-03-25 | 2019-11-05 | Project Phoenix, LLC | System to pump fluid and control thereof |
US10294936B2 (en) | 2014-04-22 | 2019-05-21 | Project Phoenix, Llc. | Fluid delivery system with a shaft having a through-passage |
EP4036412A1 (en) | 2014-06-02 | 2022-08-03 | Project Phoenix LLC | Linear actuator assembly and system |
EP3149362B1 (en) | 2014-06-02 | 2019-04-10 | Project Phoenix LLC | Hydrostatic transmission assembly and system |
EP3172444B1 (en) | 2014-07-22 | 2018-09-12 | Project Phoenix LLC | External gear pump integrated with two independently driven prime movers |
JP2016044673A (ja) * | 2014-08-22 | 2016-04-04 | 日本電産株式会社 | 動圧軸受ポンプ |
JP2016044674A (ja) * | 2014-08-22 | 2016-04-04 | 日本電産株式会社 | 動圧軸受ポンプ |
US10072676B2 (en) | 2014-09-23 | 2018-09-11 | Project Phoenix, LLC | System to pump fluid and control thereof |
EP3204647B1 (en) | 2014-10-06 | 2021-05-26 | Project Phoenix LLC | Linear actuator assembly and system |
WO2016064569A1 (en) | 2014-10-20 | 2016-04-28 | Afshari Thomas | Hydrostatic transmission assembly and system |
US10673290B2 (en) | 2015-02-26 | 2020-06-02 | American Axle & Manufacturing, Inc. | Brushless DC electric motor |
TWI768455B (zh) | 2015-09-02 | 2022-06-21 | 美商鳳凰計劃股份有限公司 | 泵送流體之系統及其控制 |
EP3344874B1 (en) | 2015-09-02 | 2021-01-20 | Project Phoenix LLC | System to pump fluid and control thereof |
CN106668966B (zh) * | 2017-01-13 | 2019-03-22 | 上海理工大学 | 一种电磁驱动泵 |
EP4233989A3 (en) | 2017-06-07 | 2023-10-11 | Shifamed Holdings, LLC | Intravascular fluid movement devices, systems, and methods of use |
EP3710076B1 (en) | 2017-11-13 | 2023-12-27 | Shifamed Holdings, LLC | Intravascular fluid movement devices, systems, and methods of use |
DE102017220437B8 (de) * | 2017-11-16 | 2019-06-19 | Eagleburgmann Germany Gmbh & Co. Kg | Pumpenanordnung, insbesondere zur Versorgung einer Gleitringdichtungsanordnung |
EP4085965A1 (en) | 2018-02-01 | 2022-11-09 | Shifamed Holdings, LLC | Intravascular blood pumps and methods of use and manufacture |
WO2021011473A1 (en) | 2019-07-12 | 2021-01-21 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
WO2021016372A1 (en) | 2019-07-22 | 2021-01-28 | Shifamed Holdings, Llc | Intravascular blood pumps with struts and methods of use and manufacture |
WO2021062265A1 (en) | 2019-09-25 | 2021-04-01 | Shifamed Holdings, Llc | Intravascular blood pump systems and methods of use and control thereof |
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- 2006-08-17 US US11/918,906 patent/US8167589B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
US20090306771A1 (en) | 2009-12-10 |
US8167589B2 (en) | 2012-05-01 |
JP4176753B2 (ja) | 2008-11-05 |
DE112006001464T5 (de) | 2008-06-26 |
JP2007075287A (ja) | 2007-03-29 |
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