CN104107466A - Half-blade-rotor-type axial flow blood pump - Google Patents
Half-blade-rotor-type axial flow blood pump Download PDFInfo
- Publication number
- CN104107466A CN104107466A CN201410379867.2A CN201410379867A CN104107466A CN 104107466 A CN104107466 A CN 104107466A CN 201410379867 A CN201410379867 A CN 201410379867A CN 104107466 A CN104107466 A CN 104107466A
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- China
- Prior art keywords
- rotor
- blade
- blood pump
- axial flow
- leading
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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
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood 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
Abstract
The invention discloses a half-blade-rotor-type axial flow blood pump which comprises an inner barrel, a front guide, a rotor and a rear guide. The front guide has three straight blades, the rotor has two rotating blades, the two rotating blades of half-blade structures are distributed on a front half of a hub of the rotor only, and blade tip clearance length of the rotor is reduced by a half; the rear guide has three big rotating blades and three small rotating blades, the big rotating blades and the small rotating blades are distributed at intervals, each big rotating blade is provided with a suspension arm with one-half length, each suspension arm extends into a rotor area to form a suspension arm blade structure, and a runner portion on the outer surface of the rotor is made by smooth date-pit-shaped cubic spline curves. The half-blade-rotor-type axial flow blood pump has the advantages that a whole runner formed by the front guide, the rotor and the rear guide is designed to be of a date-pit-shaped structure, and the smooth cubic spline curves are adopted, so that pressure rise of the blood pump is increased, flow field distribution in the pump is improved, area of a rotating-stilling interface is reduced, and risk of thrombosis at a bearing is lowered.
Description
Technical field
Patent of the present invention relates to axial flow blood pump technical field, be a kind of half vane rotator type axial flow blood pump both only had on rotor a half vane, after lead the blade cantilever of commutator and stretch into the Blood pump structure of rotor region, this structure has greatly reduced rotator tip position Blood damage, and blood pump inner rotor part is designed to Semen Jujubae type structure to reduce the axial flow blood pump of bearing region thrombosis.
Background technology
A variety of causes causes that the major consequences of heart failure is exactly that the pump blood ability of heart weakens.The effect of circulation auxiliary blood pump is compensation or alternative cardiac function, the preload of heart is declined, be conducive to the restore peace weighing apparatus of myocardial metabolism and nutrition, promote the recovery of cardiac function, for the heart that can not recover cardiac function completely, can substitute nature heart and bring into play its physiology blood-pumping function.Circulation auxiliary blood pump is the necessary means of saving acute heart failure patient life.Acute heart failure (heart failure) is the most common with acute left heart failure clinically, the myocardial contraction that refers to acute attack or the left heart function caused by abnormal that increases the weight of obviously reduces, cardiac load increases the weight of, and causes that pulmonary circulation is congested and occurs acute pulmonary venous pleonaemia, pulmonary edema and can accompany the clinical syndrome of histoorgan hypoperfusion and cardiogenic shock.The help of auxiliary blood pump of now just need to circulating just can make patient's cardiac muscle recover, and reduces mortality risk, saves patient's life.Assist circulation blood pump has huge application potential aspect transition Supporting Therapy, replacement therapy before heart failure, cardiogenic shock treatment, cardio-pulmonary resuscitation, heart transplantation.
Circulation auxiliary blood pump is divided into pulsation type and rotary two kinds, rotary circulation auxiliary blood pump is divided into two kinds of axial flow blood pump and centrifugal blood pumps, axial flow blood pump has volume feature little, that easily implant, therefore at present in the world to the degree of recognition of axial flow blood pump higher than centrifugal blood pump.
That the axial flow blood pump pump housing mainly comprises is leading, rotor, after lead and inner core.Blood pump, is provided blood flow and voltage rise, thereby alleviates the pump blood burden of heart the blood acting of flowing through by rotor.Becoming a mandarin of leading adjusting blood pump, after lead commutator and work to improve pressure, rectification.
Traditionally, axial flow blood pump is leading, rotor and after lead all and formed by wheel hub and two kinds of geometric properties of blade, between rotator tip and inner core, there is gap.
The problem that axial flow blood pump need to solve is haemolysis and thrombosis, and in blood pump, haemolysis seriously can cause patient hemorrhage, and thrombosis comes off and can cause apoplexy or thromboembolism by occluding vascular.The main method of improving blood pump hemolysis is to reduce high shear force and the large flow separation of blood flow in pump, and the Main Means that reduces thrombosis risk is to reduce the low speed blood flow region in pump and reduce sound interface area.The tip clearance place shearing force of inner core position is large, Blood damage is serious, so axial flow blood pump tip clearance place haemolysis is the most serious, is confirmed by Numerical results; Near mechanical bearing and axle contact position to turn quiet contact area large, thrombosis risk maximum, is confirmed by numerical analysis and results of animal.
Summary of the invention
The object of the invention is to overcome the above-mentioned defect of axial flow blood pump, provide a kind of and there is novel structure, can improve blood pump haemolysis, reduce the half vane rotator type axial flow blood pump of thrombosis risk.
For achieving the above object, the present invention takes following technical scheme:
A kind of half vane rotator type axial flow blood pump, it include inner core (1), leading (10), rotor (9), after lead (2), described leading (10) have 3 prismatic blades (12); Rotor (9) has 2 rotating vanes (91), and rotor hub only has that in front 1/2 part, to be distributed with two rotating vanes (91) be half vane structure, makes the tip clearance contraction in length half of rotor (9); After lead (2) have 3 rotation large blades (21) and 3 rotate vanelets (22), the large blade of this rotation (21) and rotation vanelets (22) are spaced apart, rotating large blade (21) has 1/2 length cantilever and stretches into rotor region, forms cantilever blade structure; Rotor outer surface runner section adopts the smooth cubic spline curve of date core shaped to make.This runner has suppressed mobile separation, and the rotor of date core shaped has reduced the area that turns quiet interface.
Described leading (10) and after lead (2) and be fixed on by interference fit on the inwall of inner core (1), the rotating shaft (5) that rotor (9) stretches out by two ends insert leading with after be connected in the mechanical bearing of leading.
Described leading (10) and after lead (2) blade tip diameter be 12.7mm, the blade tip diameter of rotor (9) is 12.6mm.
In the design of axial flow blood pump, be mostly, rotor leading by optimizing and after the structure led improve the Flow Field Distribution in pump, reduce the Blood damage in pump.So far also nobody considers the haemolysis by eliminating or shorten tip clearance length and improve axial flow blood pump, and in the blood pump of an abundant structure optimization of process, tip clearance is the most easily to cause the structure of haemolysis.After the blade cantilever of leading and extend into rotor region and just can shorten tip clearance length, the rectification effect of leading after increase.Leading, rotor and after lead overall Semen Jujubae shape structural design and reduced and turn quiet interface area, also improved the Flow Field Distribution in blood pump, this is confirmed by numerical simulation result.
The invention has the beneficial effects as follows: by leading, rotor and after lead the overall runner forming and adopt the structural design of date core shaped, adopt smooth cubic spline curve, both the voltage rise that had improved blood pump has also improved pump flow field and has distributed, reduce simultaneously and turned quiet interface area, reduced the thrombotic risk in bearing place; Rotor only has blade on first half wheel hub, has eliminated the tip clearance of traditional axial flow blood pump 1/2 length, has reduced the haemolysis that tip clearance causes; After lead six blade constructions that adopt the large and small spacing with blades of rotation to distribute, three rotations, large blade has 1/2 length cantilever to extend into rotor second half section wheel hub, the rectification effect of having led after both having improved has also ensured the pressurized effect of blood pump entirety.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is preamble structure schematic diagram of the present invention.
Fig. 3 is the right TV structure schematic diagram of Fig. 2.
Fig. 4 is the structural representation of looking up of Fig. 3.
Fig. 5 is rotor structure schematic diagram of the present invention.
Fig. 6 is the plan structure schematic diagram of Fig. 5.
Fig. 7 is the left TV structure schematic diagram of Fig. 6.
Fig. 8 is rear guide structure schematic diagram of the present invention.
Fig. 9 is the plan structure schematic diagram of Fig. 8.
Figure 10 is the left TV structure schematic diagram of Fig. 8.
Drawing reference numeral: 1, inner core; 2, after, lead; 3, rear guide bearing; 4, urceolus end cap; 5, rotating shaft; 6, urceolus; 7, magnet steel; 8, coil; 9, rotor; 10, leading; 11, front guide bearing; 12, prismatic blade; 91, rotating vane; 21, rotate large blade; 22, rotation vanelets.
Detailed description of the invention
Referring to shown in Fig. 1 to Figure 10: the present invention will be further described below in conjunction with embodiment, but be not limited to described content below.
The invention provides a kind of rotor half vane of date core shaped flow passage structure, the axial flow blood pump of rear guide vane sheet cantilever, its structure as shown in Figure 1, this axial flow blood pump comprise inner core 1, after lead 2, rear guide bearing 3, urceolus end cap 4, rotating shaft 5, urceolus 6, magnet steel 7, coil 8, rotor 9, leading 10, front guide bearing 11, prismatic blade 12; After in the present embodiment, leading 2 and leading 10 is fixed on the inwall of inner core 1, after being fixed on, rear guide bearing 3 leads in 2 endoporus, front guide bearing 11 is fixed in leading 10 endoporus, rotating shaft 5 and magnet steel 7 are fixed in rotor 9, and rotor 9 is led in the front guide bearing 11 on the rear guide bearing 3 and leading 10 on 2 after being supported in by rotating shaft 5.Urceolus end cap 4 and urceolus 6 tight fits, and be fixed on the outer wall of inner core 1, coil 8 is contained between inner core 1 outer wall and urceolus 6 inwalls. simultaneously
Rotor 9 adopts date core shaped structural design, has reduced the thrombotic risk of rotor front and back ends, and its entity as shown in Figure 5.Two rotating vanes 91 exist only in the first half section of rotor hub.
After lead 2 21 and 3, large blades of the rotation rotation vanelets 22 that are provided with 3 cantilevers, these 6 blades extend into the second half section of rotor hub.So just eliminated the gap existing between script rotor 9 blade tip and inner core 1, this gap is one of the most serious place of haemolysis.
Rotor 9 is to make for the docking of left and right two halves.
The present invention by leading 10, rotor 9 and after lead the 2 overall runners that form and adopt the structural design of date core shapeds, adopt smooth cubic spline curve, both the voltage rise that had improved blood pump has also improved pump flow field and has distributed, and has reduced simultaneously and has turned quiet interface area, has reduced the thrombotic risk in bearing place; Rotor 9 only has blade on first half wheel hub, has eliminated the tip clearance of traditional axial flow blood pump 1/2 length, has reduced the haemolysis that tip clearance causes; After lead 2 employings and rotate six blade constructions that large and small spacing with blades distributes, three large blades of rotation have 1/2 length cantilever to extend into rotor second half section wheel hub, lead 2 rectification effect after both having improved, and have also ensured the pressurized effect of blood pump entirety.
The above is preferred embodiment of the present invention and the know-why used thereof; for a person skilled in the art; in the situation that not deviating from the spirit and scope of the present invention; any apparent change such as equivalent transformation, simple replacement based on technical solution of the present invention basis, within all belonging to protection domain of the present invention.
Claims (3)
1. a half vane rotator type axial flow blood pump, it include inner core (1), leading (10), rotor (9), after lead (2), it is characterized in that: described leading (10) have 3 prismatic blades (12); Rotor (9) has 2 rotating vanes (91), and rotor hub only has that in front 1/2 part, to be distributed with two rotating vanes (91) be half vane structure, makes the tip clearance contraction in length half of rotor (9); After lead (2) have 3 rotation large blades (21) and 3 rotate vanelets (22), the large blade of this rotation (21) and rotation vanelets (22) are spaced apart, rotating large blade (21) has 1/2 length cantilever and stretches into rotor region, forms cantilever blade structure; Rotor outer surface runner section adopts the smooth cubic spline curve of date core shaped to make.
2. half vane rotator type axial flow blood pump according to claim 1, it is characterized in that: described leading (10) and after lead (2) and be fixed on by interference fit on the inwall of inner core (1), the rotating shaft (5) that rotor (9) stretches out by two ends insert leading with after be connected in the mechanical bearing of leading.
3. half vane rotator type axial flow blood pump according to claim 1 and 2, is characterized in that: described leading (10) and after lead (2) blade tip diameter be 12.7mm, the blade tip diameter of rotor (9) is 12.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410379867.2A CN104107466A (en) | 2014-08-04 | 2014-08-04 | Half-blade-rotor-type axial flow blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410379867.2A CN104107466A (en) | 2014-08-04 | 2014-08-04 | Half-blade-rotor-type axial flow blood pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104107466A true CN104107466A (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410379867.2A Pending CN104107466A (en) | 2014-08-04 | 2014-08-04 | Half-blade-rotor-type axial flow blood pump |
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| CN (1) | CN104107466A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688298A (en) * | 2016-01-13 | 2016-06-22 | 山东大学 | Novel inner impeller axial flow blood pump |
| CN106823029A (en) * | 2017-01-23 | 2017-06-13 | 中南大学 | A kind of Computational Fluid Dynamics Analysis of Micro-Axial Blood Pumps with non-isometric splitterr vanes structure |
| CN107013470A (en) * | 2017-06-05 | 2017-08-04 | 兰州理工大学 | A kind of axial-flow pump |
| CN107158495A (en) * | 2017-07-03 | 2017-09-15 | 中国医学科学院阜外医院 | A kind of axial flow blood pump of use split blade type through hole bearing arrangement |
| CN109106992A (en) * | 2018-08-30 | 2019-01-01 | 中国医学科学院阜外医院 | It is a kind of using etc. journal axles and bearing arrangement axial flow blood pump |
| CN114344702A (en) * | 2021-11-29 | 2022-04-15 | 苏州心擎医疗技术有限公司 | Catheter pump and pump body |
| WO2023174019A1 (en) * | 2022-03-15 | 2023-09-21 | 上海微创心力医疗科技有限公司 | Impeller structure, heart pump, and heart assist system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989004644A1 (en) * | 1987-11-24 | 1989-06-01 | Nimbus Medical, Inc. | Single-stage axial flow blood pump |
| US5947892A (en) * | 1993-11-10 | 1999-09-07 | Micromed Technology, Inc. | Rotary blood pump |
| CN201658687U (en) * | 2009-11-17 | 2010-12-01 | 陈洵 | Micro screw rod-type blood pump |
| CN204050453U (en) * | 2014-08-04 | 2014-12-31 | 中国医学科学院阜外心血管病医院 | Half vane rotator type axial flow blood pump |
-
2014
- 2014-08-04 CN CN201410379867.2A patent/CN104107466A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989004644A1 (en) * | 1987-11-24 | 1989-06-01 | Nimbus Medical, Inc. | Single-stage axial flow blood pump |
| US5947892A (en) * | 1993-11-10 | 1999-09-07 | Micromed Technology, Inc. | Rotary blood pump |
| CN201658687U (en) * | 2009-11-17 | 2010-12-01 | 陈洵 | Micro screw rod-type blood pump |
| CN204050453U (en) * | 2014-08-04 | 2014-12-31 | 中国医学科学院阜外心血管病医院 | Half vane rotator type axial flow blood pump |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688298A (en) * | 2016-01-13 | 2016-06-22 | 山东大学 | Novel inner impeller axial flow blood pump |
| CN105688298B (en) * | 2016-01-13 | 2018-02-27 | 山东大学 | New-type inner impeller axial blood pump |
| CN106823029A (en) * | 2017-01-23 | 2017-06-13 | 中南大学 | A kind of Computational Fluid Dynamics Analysis of Micro-Axial Blood Pumps with non-isometric splitterr vanes structure |
| CN107013470A (en) * | 2017-06-05 | 2017-08-04 | 兰州理工大学 | A kind of axial-flow pump |
| CN107013470B (en) * | 2017-06-05 | 2019-02-05 | 兰州理工大学 | A kind of axial-flow pump |
| CN107158495A (en) * | 2017-07-03 | 2017-09-15 | 中国医学科学院阜外医院 | A kind of axial flow blood pump of use split blade type through hole bearing arrangement |
| CN109106992A (en) * | 2018-08-30 | 2019-01-01 | 中国医学科学院阜外医院 | It is a kind of using etc. journal axles and bearing arrangement axial flow blood pump |
| CN114344702A (en) * | 2021-11-29 | 2022-04-15 | 苏州心擎医疗技术有限公司 | Catheter pump and pump body |
| CN114344702B (en) * | 2021-11-29 | 2022-12-06 | 苏州心擎医疗技术有限公司 | Catheter pump and pump body |
| WO2023174019A1 (en) * | 2022-03-15 | 2023-09-21 | 上海微创心力医疗科技有限公司 | Impeller structure, heart pump, and heart assist system |
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| PB01 | Publication | ||
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Application publication date: 20141022 |