WO2018135478A1 - Pompe - Google Patents

Pompe Download PDF

Info

Publication number
WO2018135478A1
WO2018135478A1 PCT/JP2018/000989 JP2018000989W WO2018135478A1 WO 2018135478 A1 WO2018135478 A1 WO 2018135478A1 JP 2018000989 W JP2018000989 W JP 2018000989W WO 2018135478 A1 WO2018135478 A1 WO 2018135478A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
impeller
rectification
rectifying plate
housing
Prior art date
Application number
PCT/JP2018/000989
Other languages
English (en)
Japanese (ja)
Inventor
森武寿
畑優
野尻利彦
Original Assignee
テルモ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by テルモ株式会社 filed Critical テルモ株式会社
Priority to JP2018563332A priority Critical patent/JP7150616B2/ja
Publication of WO2018135478A1 publication Critical patent/WO2018135478A1/fr

Links

Images

Classifications

    • 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
    • A61M60/10—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
    • A61M60/13—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
    • 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
    • A61M60/135—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel inside a blood vessel, e.g. using grafting
    • A61M60/139—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel inside a blood vessel, e.g. using grafting inside the aorta, e.g. intra-aortic balloon 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
    • A61M60/10—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
    • A61M60/17—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart inside a ventricle, e.g. intraventricular balloon 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
    • A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
    • A61M60/411—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor
    • A61M60/414—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D11/00—Other rotary non-positive-displacement 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers

Definitions

  • the present invention relates to a pump including a rectifying plate that rectifies a flow from an impeller.
  • Heart failure is a condition in which the blood volume necessary for metabolism in the whole body tissue cannot be ejected from the heart due to a decrease in cardiac function. When cardiac function is significantly reduced, it is necessary to assist cardiac output.
  • blood pumps auxiliary pumps
  • the pump disclosed in US Pat. No. 9,308,302 is composed of an axial flow type impeller, a housing surrounding the impeller, and a plurality of blades disposed adjacent to the downstream side (proximal direction side) of the impeller.
  • a stator rectifier plate, and is configured to rectify the flow from the impeller by the stator.
  • the present invention has been made in consideration of such problems.
  • the flow by the impeller of the mixed flow pump or the centrifugal pump is generated without reducing the clearance between the impeller and the housing. Therefore, the present invention efficiently captures the flow generated by the impeller by the flow straightening plate that rectifies the flow in the direction intersecting the axis generated by the impeller adjacent to the radial direction of the impeller. It is an object of the present invention to provide a pump that can exhibit good pump performance.
  • the present invention provides an impeller that deflects axial flow in a direction intersecting the axis with rotation, a housing that surrounds the impeller, and an impeller disposed between the impeller and the housing.
  • a rectifying plate that deflects a flow in a direction intersecting the axis generated by the impeller, and the rectifying plate has a rectification start portion disposed adjacent to an outer peripheral portion of the impeller. It is characterized by.
  • the rectifying plate that deflects the flow in the axial direction in the direction intersecting the axis by the impeller and deflects the flow from the impeller is located beside the impeller (outside in the radial direction).
  • the rectification start part is arranged in the.
  • the rectifying plate may protrude inward from the inner peripheral surface of the housing.
  • the pump may include a support member disposed inside the housing, and the rectifying plate may protrude outward from an outer peripheral surface of the support member.
  • the rectification start portion may extend in a circumferential direction around the axis or in a direction inclined with respect to the circumferential direction.
  • the rectifying plate may deflect the flow in the direction intersecting the axis in the axial direction.
  • the rectifying plate may have a rectification end portion disposed downstream of the rectification start portion and the impeller.
  • This configuration makes it possible to increase the rectification distance and to fully demonstrate the rectification function of the rectifying plate.
  • the rectification end portion may extend in the axial direction.
  • the rectifying plate may include an intermediate rectifying unit that is positioned downstream of the impeller and extends in a direction inclined with respect to the circumferential direction between the rectifying start unit and the rectifying end unit. Good.
  • the rectification start unit, the intermediate rectification unit, and the rectification end unit may be connected in series.
  • a plurality of the current plates may be arranged at intervals in the circumferential direction.
  • the impeller may have blades arranged radially, and the number of the rectifying plates may be larger than the number of blades in the circumferential direction.
  • the pump may have the form of a centrifugal pump that deflects the axial flow in the radial direction by the impeller.
  • the pump may be in the form of a blood pump that is inserted into the heart to assist in reducing cardiac function.
  • the rectifying plate is disposed between the impeller and the housing, and the rectifying plate that deflects the flow from the impeller includes the rectification start portion disposed directly beside the impeller (outside in the radial direction). Have. For this reason, the flow pushed out to the outer periphery direction of an impeller can be caught efficiently, and it is possible to exhibit favorable pump performance.
  • FIG. 4 is a front view of the housing viewed from the front end side (a cross-sectional view taken along line IV-IV in FIG. 2). It is explanatory drawing at the time of use of the said pump.
  • a pump 10 according to this embodiment shown in FIG. 1 is inserted into the heart of a patient whose cardiac function has been significantly reduced, such as heart failure, for example, and is used for assisting cardiac output. It is configured as a pump 10A.
  • the pump 10 includes an impeller 12, a hollow cylindrical housing 14 that surrounds the impeller 12, a drive shaft 16 that rotationally drives the impeller 12, and a catheter 18 through which the drive shaft 16 is inserted.
  • the pump 10 is a long device having flexibility as a whole.
  • the impeller 12 has a hub 22 that forms the center of the impeller 12 and a blade structure 23 provided on the hub 22.
  • the impeller 12 is a centrifugal pump impeller configured to deflect an axial flow in a radial direction. Therefore, the pump 10 is configured as a centrifugal pump.
  • the pump 10 may be configured as a mixed flow pump in which the flow discharged by the impeller 12 is inclined with respect to the axial direction.
  • the hub 22 is connected and fixed to the tip of the drive shaft 16 and is driven to rotate about the axis a by the drive shaft 16.
  • axis a of the impeller 12 since the axis of the impeller 12 coincides with the axis a of the hub 22, it may be hereinafter referred to as “axis a of the impeller 12”.
  • the blade structure 23 includes a plurality of blades 26 in the axial direction, and a plurality of blades 26 are arranged at intervals in the circumferential direction around the axis a (hereinafter simply referred to as “circumferential direction”).
  • a blade row 25 is constituted by a plurality of blades 26 extending (projecting) radially from the hub 22 in each stage. Note that the blade structure 23 may have the blade row 25 in only one stage in the axial direction.
  • the housing 14 is a hollow member having a distal end opening 14a and a proximal end opening 14b, and is a flexible member.
  • the distal end opening 14a is a blood inflow port
  • the proximal end opening 14b is a blood outflow port.
  • the impeller 12 is rotatably disposed in the base end portion 14 c of the housing 14.
  • the base end portion 14 c of the housing 14 has an annular bulging portion 14 d surrounding the impeller 12.
  • a flexible tip member 42 is connected to the tip of the housing 14 via a plurality of connecting members 40 arranged in the circumferential direction.
  • the plurality of connecting members 40 support the flexible tip member 42.
  • the tip of the flexible tip member 42 is curved.
  • a space 41 is formed between the plurality of connecting members 40, and blood can flow into the housing 14 from the tip opening 14 a through the space 41.
  • the proximal end portion 14 c of the housing 14 is supported by a support member 19 provided at the distal end portion of the catheter 18.
  • the support member 19 is disposed in the base end portion 14 c (annular bulging portion 14 d) of the housing 14, and forms an annular fluid discharge path 21 extending in the axial direction between the support member 19 and the housing 14. Yes.
  • the outer diameter of the support member 19 is set to be substantially the same as the outer diameter of the impeller 12.
  • the outer diameter of the support member 19 may be set to be equal to or larger than the outer diameter of the impeller 12.
  • the base end portion 14c of the housing 14 and the support member 19 are connected by a plurality of connection members (rims) (not shown) arranged at intervals in the circumferential direction, whereby the housing 14 is supported so as not to rotate. Therefore, the housing 14 is a stationary part that does not rotate during operation of the pump 10.
  • the pump 10 includes an impeller 12, a hollow cylindrical housing 14 surrounding the impeller 12, a drive shaft 16 that rotationally drives the impeller 12, a catheter 18 through which the drive shaft 16 is inserted, and a sheath 20 through which the catheter 18 is inserted.
  • the distal end portion of the drive shaft 16 protrudes from the support member 19 in the distal direction.
  • the hub 22 of the impeller 12 is connected to the tip of the drive shaft 16 protruding from the support member 19.
  • the drive shaft 16 is rotatably supported by a bearing portion (not shown) disposed inside the support member 19.
  • the drive shaft 16, the catheter 18, and the sheath 20 extend to the proximal end side of the pump 10, and are all long members having flexibility.
  • the drive shaft 16 is connected to an actuator (such as a motor) on the base end side (hand side) of the pump 10 and is driven to rotate by the actuator.
  • an actuator such as a motor
  • a rectifying plate 44 that deflects the flow in the direction intersecting the axis a generated by the impeller 12 is disposed.
  • a plurality of rectifying plates 44 are provided on the inner peripheral surface of the annular bulging portion 14 d surrounding the impeller 12 in the housing 14 at intervals in the circumferential direction.
  • the plurality of rectifying plates 44 are arranged at equal intervals in the circumferential direction, and project radially inward from the inner circumferential surface of the annular bulging portion 14d.
  • the rectifying plate 44 may be provided on the outer peripheral surface 19a of the support member 19 (may protrude radially outward from the outer peripheral surface 19a).
  • the number of blades 26 in the circumferential direction of the impeller 12 (the number of blades 26 constituting each blade row 25) is 4, and the number of rectifying plates 44 in the circumferential direction is 7. Therefore, the number of rectifying plates 44 is larger than the number of blades 26 in the circumferential direction.
  • the number of rectifying plates 44 may be equal to or less than the number of blades 26 in the circumferential direction.
  • the rectifying plate 44 has a portion parallel to the axis a.
  • the current plate 44 has a portion inclined with respect to the circumferential direction.
  • the current plate 44 has a bent portion between the distal end and the proximal end.
  • the rectifying plate 44 has a region overlapping with the impeller 12 and a region not overlapping with the impeller 12 in the axial direction.
  • the current plate 44 has a plurality of regions arranged at different circumferential positions.
  • the configuration of the rectifying plate 44 will be specifically described.
  • the rectifying plate 44 includes a rectification start portion 44 a disposed adjacent to the outer peripheral portion of the impeller 12, and a rectification end disposed on the downstream side of the rectification start portion 44 a and the impeller 12.
  • the rectification start portion 44 a is a portion constituting the tip region of the rectification plate 44 and faces the outer peripheral portion of the impeller 12 in the radial direction. That is, the rectification start portion 44 a is disposed on the radially outer side of the outer peripheral portion of the impeller 12.
  • the most advanced portion of the rectification start portion 44 a (the most advanced portion of the rectifying plate 44) is the most advanced portion of the wing structure 23 (the most advanced portion of the blade 26 on the tip side) and the wing structure 23. It is located between the most proximal end portion (most proximal end portion of the blade 26 on the proximal end side). More specifically, the most distal end portion of the rectification start portion 44a is located in a region overlapping with the outer end of the tip-side blade 26 in the axial direction. Note that the most distal portion of the rectification start portion 44a may be located in a region overlapping with the outer end of the blade 26 on the base end side in the axial direction.
  • a radial clearance CL space is provided between the outer peripheral portion of the impeller 12 (the radially outer end of the blade 26) and the radially inner end of the rectification start portion 44a.
  • the clearance CL is preferably set in a range in which the outer peripheral portion of the impeller 12 does not come into contact with the current plate 44 when the impeller 12 rotates.
  • the clearance CL is set to 0.1 to 2 mm, and preferably set to 0.5 to 1 mm. Is done.
  • the rectification start portion 44a extends in a direction inclined with respect to the circumferential direction. Specifically, the rectification start portion 44a is inclined so as to be displaced in the proximal direction toward the rotation direction (arrow R direction) of the impeller 12.
  • the rectification start unit 44a may extend in a direction parallel to the circumferential direction.
  • the rectification end portion 44 b is a portion constituting the proximal end region of the rectifying plate 44 and faces the outer peripheral surface 19 a of the support member 19 in the radial direction.
  • the position of the rectification end unit 44b is different from the position of the rectification start unit 44a in the circumferential direction. Specifically, the rectification end portion 44b is located closer to the rotation direction side of the impeller 12 than the rectification start portion 44a.
  • the radially inner end of the rectification end portion 44 b is in contact with the outer peripheral surface 19 a of the support member 19.
  • the radially inner end of the rectification end portion 44b may not be in contact with the outer peripheral surface 19a of the support member 19 (between the radial inner end of the rectification end portion 44b and the outer peripheral surface 19a of the support member 19).
  • Radial clearance (space) may be present). In this case, the clearance is preferably set as small as possible.
  • the rectification end portion 44b extends in parallel with the axis a of the impeller 12. Note that the rectification end portion 44b may extend in a direction inclined with respect to the axis a of the impeller 12 (a direction inclined with respect to the circumferential direction).
  • the intermediate rectifying unit 44c is a part constituting an intermediate region of the rectifying plate 44, and is located on the downstream side of the impeller 12 and extends in a direction inclined with respect to the circumferential direction.
  • the intermediate rectification unit 44c is curved in an arc between the rectification start unit 44a and the rectification end unit 44b. Accordingly, the intermediate rectification unit 44c smoothly connects the proximal end of the rectification start unit 44a and the distal end of the rectification end unit 44b that are different in circumferential direction position.
  • the rectification start portion 44a, the intermediate rectification portion 44c, and the rectification end portion 44b have the same protruding height from the inner peripheral surface 15 of the housing 14 (the inner peripheral surface of the annular bulging portion 14d). Accordingly, the rectifying plate 44 has a constant protrusion height from the distal end to the proximal end.
  • the rectification start portion 44a, the intermediate rectification portion 44c, and the rectification end portion 44b may have different protrusion heights from the inner peripheral surface 15 of the housing 14.
  • the rectification start unit 44a, the intermediate rectification unit 44c, and the rectification end unit 44b have the same thickness (plate thickness). Therefore, the rectifying plate 44 has a constant thickness from the distal end to the proximal end. Note that the rectification start unit 44a, the intermediate rectification unit 44c, and the rectification end unit 44b may have different thicknesses. In this case, the thickness of the rectifying plate 44 may decrease from the distal end toward the proximal end or from the proximal end toward the distal end.
  • the rectification start unit 44a, the intermediate rectification unit 44c, and the rectification end unit 44b are connected in series. That is, the rectification start part 44a, the intermediate rectification part 44c, and the rectification end part 44b are integrally formed.
  • the rectifying plate 44 may be divided into a plurality of segments in the axial direction (may be formed discontinuously in the axial direction). In this case, the rectifying plate 44 may be divided into three stages of segments each serving as the rectification start unit 44a, the intermediate rectification unit 44c, and the rectification end unit 44b.
  • the rectifying plate 44 may have a straight line shape parallel to the axis a from the distal end to the proximal end.
  • the rectifying plate 44 may be inclined with respect to the circumferential direction from the distal end to the proximal end.
  • the rectifying plate 44 may have a straight region in which a distal end region is inclined with respect to the circumferential direction, and an intermediate region and a proximal end region are parallel to the axis a.
  • the rectifying plate 44 may have a linear shape in which the distal end region and the proximal end region are inclined with respect to the circumferential direction, and the intermediate region is parallel to the axis a.
  • the rectifying plate 44 may extend spirally from the distal end to the base end (in this case, only one spiral rectifying plate 44 may be provided, or two or more spiral rectifying plates 44 may be provided. Also good).
  • the blood pump 10A is inserted, for example, from the artery of the leg (thigh) of the patient whose cardiac function has been lowered, and the distal end of the blood pump 10A is inserted into the heart 48 (in the left ventricle 54) as shown in FIG. Is done. Specifically, the distal end opening 14 a that is the inflow port of the housing 14 is disposed in the left ventricle 54, and the proximal end opening 14 b that is the outflow port of the housing 14 is disposed in the aorta 50.
  • the pump 10 according to the present embodiment has the following effects.
  • the impeller 12 deflects the axial flow in a direction intersecting the axis a, and the rectifying plate 44 that deflects the flow from the impeller 12 is directly beside the impeller 12 (outside in the radial direction). It has the commutation start part 44a arrange
  • the flow by the impeller of the mixed flow pump or the centrifugal pump is generated without reducing the clearance between the impeller and the housing. For this reason, since the outer peripheral part of the impeller 12 and the position of the rectifying plate 44 are adjacent to each other, the rectifying plate 44 can efficiently capture the flow generated by the impeller 12 and can exhibit good pump performance. Become.
  • the rectifying plate 44 protrudes inward from the inner peripheral surface 15 of the housing 14. With this configuration, a clearance is not formed between the inner peripheral surface 15 of the housing 14 and the rectifying plate 44, so that even better pump performance can be exhibited.
  • the rectification start portion 44a extends in the circumferential direction around the axis a or in a direction inclined with respect to the circumferential direction. With this configuration, the flow from the impeller 12 can be efficiently deflected by the rectification start unit 44a.
  • the rectifying plate 44 is configured to deflect the flow in the direction intersecting the axis a in the axial direction. With this configuration, the flow from the impeller 12 is deflected in the axial direction by the rectifying plate 44, so that even better pump performance can be exhibited.
  • the rectifying plate 44 includes a rectification start portion 44 a and a rectification end portion 44 b disposed on the downstream side of the impeller 12. With this configuration, the rectification distance can be increased and the rectification function of the rectifying plate 44 can be sufficiently exhibited.
  • the rectification end portion 44b extends in the axial direction. With this configuration, the flow from the impeller 12 is deflected in the axial direction by the rectification end portion 44b, so that even better pump performance can be exhibited.
  • the rectifying plate 44 includes an intermediate rectifying portion 44c that is located on the downstream side of the impeller 12 and extends in a direction inclined with respect to the circumferential direction between the rectifying start portion 44a and the rectifying end portion 44b.
  • the rectification start unit 44a, the intermediate rectification unit 44c, and the rectification end unit 44b are connected in series. With this configuration, since the flow from the impeller 12 is rectified seamlessly from the rectification start unit 44a to the rectification end unit 44b, a better rectification function can be exhibited.
  • a plurality of rectifying plates 44 are arranged at intervals in the circumferential direction.
  • the number of rectifying plates 44 is larger than the number of blades 26 in the circumferential direction. With this configuration, a sufficient rectification function is exhibited, and better pump performance is obtained.
  • the pump 10 has a form of a centrifugal pump in which an axial flow is deflected radially by an impeller 12. By being a centrifugal pump, the effect of the present invention is more satisfactorily exhibited.
  • the pump 10 has the form of a blood pump 10A that is inserted into the heart to assist in lowering cardiac function.
  • a blood pump 10A By applying the present invention to a blood pump, it can effectively contribute to the improvement of symptoms of heart failure.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
  • the present invention is also applicable to pumps other than medical pumps.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Cardiology (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • General Engineering & Computer Science (AREA)
  • Transplantation (AREA)
  • External Artificial Organs (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne une pompe (10) comprenant : une roue à ailettes (12) qui tourne pour dévier, dans une direction croisant un axe, un flux se déplaçant dans la direction axiale ; un boîtier (14) qui entoure la roue à ailettes (12) ; et des plaques de redressement (44) qui sont disposées entre la roue à ailettes (12) et le boîtier (14), et qui dévient le flux se déplaçant dans la direction croisant l'axe (a) généré par la roue à ailettes (12). Les plaques de redressement (44) sont pourvues de parties de départ de redressement (44a) qui sont disposées près de la circonférence extérieure de la roue à ailettes (12).
PCT/JP2018/000989 2017-01-18 2018-01-16 Pompe WO2018135478A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018563332A JP7150616B2 (ja) 2017-01-18 2018-01-16 ポンプ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017006423 2017-01-18
JP2017-006423 2017-01-18

Publications (1)

Publication Number Publication Date
WO2018135478A1 true WO2018135478A1 (fr) 2018-07-26

Family

ID=62908963

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/000989 WO2018135478A1 (fr) 2017-01-18 2018-01-16 Pompe

Country Status (2)

Country Link
JP (1) JP7150616B2 (fr)
WO (1) WO2018135478A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10722631B2 (en) 2018-02-01 2020-07-28 Shifamed Holdings, Llc Intravascular blood pumps and methods of use and manufacture
US11185677B2 (en) 2017-06-07 2021-11-30 Shifamed Holdings, Llc Intravascular fluid movement devices, systems, and methods of use
US11368081B2 (en) 2018-01-24 2022-06-21 Kardion Gmbh Magnetic coupling element with a magnetic bearing function
US11511103B2 (en) 2017-11-13 2022-11-29 Shifamed Holdings, Llc Intravascular fluid movement devices, systems, and methods of use
US11654275B2 (en) 2019-07-22 2023-05-23 Shifamed Holdings, Llc Intravascular blood pumps with struts and methods of use and manufacture
US11724089B2 (en) 2019-09-25 2023-08-15 Shifamed Holdings, Llc Intravascular blood pump systems and methods of use and control thereof
US11754075B2 (en) 2018-07-10 2023-09-12 Kardion Gmbh Impeller for an implantable, vascular support system
US11944805B2 (en) 2020-01-31 2024-04-02 Kardion Gmbh Pump for delivering a fluid and method of manufacturing a pump
US11964145B2 (en) 2019-07-12 2024-04-23 Shifamed Holdings, Llc Intravascular blood pumps and methods of manufacture and use
US12005248B2 (en) 2018-05-16 2024-06-11 Kardion Gmbh Rotor bearing system
US12064615B2 (en) 2018-05-30 2024-08-20 Kardion Gmbh Axial-flow pump for a ventricular assist device and method for producing an axial-flow pump for a ventricular assist device
US12076549B2 (en) 2018-07-20 2024-09-03 Kardion Gmbh Feed line for a pump unit of a cardiac assistance system, cardiac assistance system and method for producing a feed line for a pump unit of a cardiac assistance system
US12107474B2 (en) 2018-05-16 2024-10-01 Kardion Gmbh End-face rotating joint for transmitting torques
US12102815B2 (en) 2019-09-25 2024-10-01 Shifamed Holdings, Llc Catheter blood pumps and collapsible pump housings
US12121713B2 (en) 2020-09-25 2024-10-22 Shifamed Holdings, Llc Catheter blood pumps and collapsible blood conduits

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05508918A (ja) * 1990-07-10 1993-12-09 ゼネラル・エレクトリック・カンパニイ 沸騰水炉ターボポンプ再循環系
JP2001523983A (ja) * 1996-10-04 2001-11-27 コナイテッド ステイツ サージカル コーポレイション 循環器支援システム
US20130331934A1 (en) * 2012-06-08 2013-12-12 Cameron International Corporation Artificial heart system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5508918B2 (ja) 2010-03-30 2014-06-04 アズビル株式会社 燃焼制御装置
JP6099335B2 (ja) * 2012-08-31 2017-03-22 シャープ株式会社 送風装置およびヘアードライヤ
US9308302B2 (en) 2013-03-15 2016-04-12 Thoratec Corporation Catheter pump assembly including a stator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05508918A (ja) * 1990-07-10 1993-12-09 ゼネラル・エレクトリック・カンパニイ 沸騰水炉ターボポンプ再循環系
JP2001523983A (ja) * 1996-10-04 2001-11-27 コナイテッド ステイツ サージカル コーポレイション 循環器支援システム
US20130331934A1 (en) * 2012-06-08 2013-12-12 Cameron International Corporation Artificial heart system

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11185677B2 (en) 2017-06-07 2021-11-30 Shifamed Holdings, Llc Intravascular fluid movement devices, systems, and methods of use
US11717670B2 (en) 2017-06-07 2023-08-08 Shifamed Holdings, LLP Intravascular fluid movement devices, systems, and methods of use
US11511103B2 (en) 2017-11-13 2022-11-29 Shifamed Holdings, Llc Intravascular fluid movement devices, systems, and methods of use
US11804767B2 (en) 2018-01-24 2023-10-31 Kardion Gmbh Magnetic coupling element with a magnetic bearing function
US11368081B2 (en) 2018-01-24 2022-06-21 Kardion Gmbh Magnetic coupling element with a magnetic bearing function
US11229784B2 (en) 2018-02-01 2022-01-25 Shifamed Holdings, Llc Intravascular blood pumps and methods of use and manufacture
US12076545B2 (en) 2018-02-01 2024-09-03 Shifamed Holdings, Llc Intravascular blood pumps and methods of use and manufacture
US10722631B2 (en) 2018-02-01 2020-07-28 Shifamed Holdings, Llc Intravascular blood pumps and methods of use and manufacture
US12005248B2 (en) 2018-05-16 2024-06-11 Kardion Gmbh Rotor bearing system
US12107474B2 (en) 2018-05-16 2024-10-01 Kardion Gmbh End-face rotating joint for transmitting torques
US12064615B2 (en) 2018-05-30 2024-08-20 Kardion Gmbh Axial-flow pump for a ventricular assist device and method for producing an axial-flow pump for a ventricular assist device
US11754075B2 (en) 2018-07-10 2023-09-12 Kardion Gmbh Impeller for an implantable, vascular support system
US12076549B2 (en) 2018-07-20 2024-09-03 Kardion Gmbh Feed line for a pump unit of a cardiac assistance system, cardiac assistance system and method for producing a feed line for a pump unit of a cardiac assistance system
US11964145B2 (en) 2019-07-12 2024-04-23 Shifamed Holdings, Llc Intravascular blood pumps and methods of manufacture and use
US11654275B2 (en) 2019-07-22 2023-05-23 Shifamed Holdings, Llc Intravascular blood pumps with struts and methods of use and manufacture
US11724089B2 (en) 2019-09-25 2023-08-15 Shifamed Holdings, Llc Intravascular blood pump systems and methods of use and control thereof
US12102815B2 (en) 2019-09-25 2024-10-01 Shifamed Holdings, Llc Catheter blood pumps and collapsible pump housings
US11944805B2 (en) 2020-01-31 2024-04-02 Kardion Gmbh Pump for delivering a fluid and method of manufacturing a pump
US12121713B2 (en) 2020-09-25 2024-10-22 Shifamed Holdings, Llc Catheter blood pumps and collapsible blood conduits

Also Published As

Publication number Publication date
JP7150616B2 (ja) 2022-10-11
JPWO2018135478A1 (ja) 2019-11-07

Similar Documents

Publication Publication Date Title
WO2018135478A1 (fr) Pompe
WO2018135477A1 (fr) Pompe à sang
US11938311B2 (en) Anti-suction blood pump inlet
JP7150617B2 (ja) インペラ及び血液ポンプ
JP6360948B2 (ja) 血管内血液ポンプ
JP2024026377A5 (fr)
JP4015196B2 (ja) 血液ポンプ
JP2024124562A (ja) ポンプ、特に血液ポンプ
JP4553943B2 (ja) 折り畳んで血管内に挿入可能な血液ポンプ
EP3133294B1 (fr) Ventilateur, diffuseur et aspirateur l'utilisant
JP2023505211A (ja) 血液ポンプ
JP6387342B2 (ja) 遠位ベアリング支持体
JP2020523090A5 (fr)
JP2024120044A (ja) 密封型マイクロポンプ
JP2021526612A (ja) 心臓補助システム用軸流ポンプおよび心臓補助システム用軸流ポンプの製造法
JP2019080594A (ja) カテーテルポンプおよび処置方法
JPWO2021113389A5 (fr)
EP3146987A1 (fr) Rotor de pompe à sang rotative pour assistance cardiaque
BRPI1105490B1 (pt) Propulsor para uma bomba centrífuga
JP2013185440A (ja) 遠心ファン
JP2019514558A (ja) 呼吸装置のための送風機
CN115474950A (zh) 能够防凝血的血液泵
JP6053882B2 (ja) インペラ及び流体機械
CN220175861U (zh) 叶轮组件、泵头及介入式导管装置
JP5412090B2 (ja) 遠心式血液ポンプ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18741469

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2018563332

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18741469

Country of ref document: EP

Kind code of ref document: A1