CN209301837U - A kind of external blood pump that can reduce haemolysis - Google Patents
A kind of external blood pump that can reduce haemolysis Download PDFInfo
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- CN209301837U CN209301837U CN201820555905.9U CN201820555905U CN209301837U CN 209301837 U CN209301837 U CN 209301837U CN 201820555905 U CN201820555905 U CN 201820555905U CN 209301837 U CN209301837 U CN 209301837U
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- pump
- haemolysis
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Abstract
The utility model provides a kind of external blood pump that can reduce haemolysis, including pump case；Pump case is equipped with pump inlet and pump discharge；A cavity is equipped in pump case, the cavity is connected to pump inlet and pump discharge；Rotatable vane rotor is equipped in cavity；The vane rotor lower end stretches out cavity and extends to pump case；The part that vane rotor stretches out pump case is connect by sealing element and bearing with pump case, and vane rotor bottom connects motor.The external blood pump described in the utility model that haemolysis can be reduced, the blood pump are to have an axis centrifugal pump, and to be placed on pump outer for the components such as bearing, and not with contacting blood, processing technology is simple, low cost, and can effectively reduce the generation of haemolysis.
Description
Technical field
The utility model belongs to medical instruments field, more particularly, to a kind of energy that can be widely used in extracorporeal circulation apparatus
Enough reduce the external blood pump of haemolysis.
Background technique
Blood pump is also known as artificial heart pump, the blood pump that can be divided into implantable blood pump and external auxiliary device.Implantable
Blood pump can be divided into full artificial heart and ventricular assisted device according to supplementary mode, and pump volume is small, and control is complicated, higher cost.Body
The general volume of blood pump in outer auxiliary device is larger, but cost is relatively low, makes the important component of extracorporeal circulation apparatus, can part
Or the pump machine energy of substitution heart completely, the treatment method of the good blood circulation situation of whole body is maintained, is mainly used for outside angiocarpy
Section's operation, oncotherapy, extracorporeal membrane oxygenation (ECMO), organ transplantation and other shell fields.
External blood pump clinically has roller pump and two kinds of centrifugal pump.Roller pump is not easily shifted, difficult management, and in pump blood
Larger extruding force can be generated simultaneously, causes haemolysis, therefore in the preferred centrifugal pump of first aid profession as external blood pump.But current body
Outer blood pump still has the problem of complication such as price higher, Yi Fasheng haemolysis.
Summary of the invention
In view of this, the utility model is directed to a kind of external blood pump that can reduce haemolysis, to overcome the prior art
Defect, which is to have an axis centrifugal pump, and it is outer that the components such as bearing are placed on pump, and not with contacting blood, processing technology is simple, cost
It is low, and the generation of haemolysis can be effectively reduced.
In order to achieve the above objectives, the technical solution of the utility model is achieved in that
A kind of external blood pump that can reduce haemolysis, including pump case；Pump case is equipped with pump inlet and pump discharge；Pump is outer
A cavity is equipped in shell, the cavity is connected to pump inlet and pump discharge；Rotatable vane rotor is equipped in cavity；The leaf
Wheel rotor lower end stretches out cavity and extends to pump case；The part that vane rotor stretches out pump case is outer by sealing element and bearing and pump
Shell connection, and vane rotor bottom connects motor.
Further, there are a groove, sealing element and bearings to be fastened on the groove for the pump case bottom outer surface
It is interior；Sealing element is located at the upper end of bearing, and is bonded with the top of groove.
Further, the groove is ladder-like, and the internal diameter of upper end is less than the internal diameter of lower end；The sealing element is located at groove
Upper end, bearing is located at the lower end of groove, and the bottom of bearing is concordant with the bottom of groove.
Further, the vane rotor includes several blades, deflection cone, boss and axis, and several blades, deflection cone and
There are spacing between the peripheral wall of cavity for boss；The deflection cone is corresponding with the position of pump inlet, and between the two there are
Spacing；The deflection cone, several blades and boss are set gradually from top to bottom, and adjacent the two is fixedly connected；The axis upper end
The region that through-hole and several blades among boss surround at least is sequentially passed through under to connect with deflection cone bottom；It stretches the lower end of axis
Cavity extends to pump case out；Position of the axle position below cavity is connect with pump case gap.
Further, several blades are uniformly distributed along deflection cone bottom cylindrical week, and several blades, deflection cone and axis are constituted
" umbrella " shape；Several blades all extend to outside boss；The position that pump case is stretched out in the axis lower end passes through sealing element and bearing and pump
Cage connection, and the bottom of axis connects motor by shaft coupling.
Further, the boss is cyclic annular, and the internal diameter of boss is greater than the diameter of axis；The upper end of axis and deflection cone one at
Type is detachably connected, and the mode being detachably connected can be threaded connection, grafting etc.；Position and pump of the axle position below cavity
Housing slot is 0.02-0.2 μm.
Further, boss upper surface is tilted down from centre to edge, and the lateral surface of boss is the up big and down small conical surface；
Blood pump impeller diameter is 40-80mm.
Further, the outside the boss face and the junction of lower surface, the junction of inner peripheral surface and lower surface, inner peripheral surface
Rounding is equipped with the junction of upper surface.
Further, the cavity is up big and down small ladder-like.
Further, the pump inlet is located at the top of pump case, and pump discharge is located at the side of pump case.
Compared with the existing technology, the external blood pump that one kind described in the utility model can reduce haemolysis has following excellent
Gesture:
(1) compared with electromagnetic levitation type, there are axis connection, control simple, stable connection；
(2) bearing is placed on outside pump, not with contacting blood, reduces haemolysis；And processing cost is low, does not also need valuableness
Parts of bearings
(3) processing technology is good, and the gap between pump bottom case heat exchange axis can drop to 0.02-0.2 μm, and the routine of red blood cell
Diameter is at 8 μm, thus red blood cell cannot be introduced into gap, greatly reduce the generation of haemolysis.
(4) revolving speed is lower, therefore blade reduces the abrasion of red blood cell, greatly reduces haemolysis.
One kind described in the utility model can reduce the external blood pump of haemolysis, what blade, deflection cone and boss composition pumped
Rotating part.Diameter relative to existing general magnetic suspension blood pump is between 20-40mm, in flow 4-6L/min, lift 80-
Under conditions of 120mmHg, the 2800-3200rpm the case where, one kind described in the utility model can for the revolving speed of magnetic suspension blood pump
The external blood pump for reducing haemolysis, can be by the spacing between axis and pump lower casing (namely under axis and cavity using existing processing technology
Hold pump case junction gap between the two) control is at 0.2-2 μm, and the blood pump impeller diameter is between 40-80mm, in phase
Under the conditions of the flow and lift answered, corresponding revolving speed is 1900-2500rpm.In addition, control shaft and pump lower casing between spacing (
That is axis and the gap of cavity lower end pump case junction between the two) control is at 0.2-2 μm, and the average diameter of red blood cell is 7-
8 μm, red blood cell cannot be introduced into axis and pump the gap between lower casing, can reduce the generation of haemolysis and thrombus.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.?
In attached drawing:
Fig. 1 is the perspective view that the external blood pump of haemolysis can be reduced described in the utility model embodiment；
Fig. 2 is the top view that the external blood pump of haemolysis can be reduced described in the utility model embodiment；
Fig. 3 is the cross-sectional view in the face A-A in Fig. 2；
Fig. 4 is the main view that the external blood pump of haemolysis can be reduced described in the utility model embodiment；
Fig. 5 is the cross-sectional view in the face B-B in Fig. 4；
Fig. 6 is the perspective view that the vane rotor of external blood pump of haemolysis can be reduced described in the utility model embodiment.
Description of symbols:
1- pump case；2- pump inlet；3- pump discharge；4- cavity；5- vane rotor；501- blade；502- deflection cone；503-
Boss；504- axis；6- sealing element；7- bearing；8- motor；9- shaft coupling.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in figures 1 to 6, a kind of external blood pump that can reduce haemolysis, including pump case 1；Pump case 1 be equipped with pump into
Mouth 2 and pump discharge 3；A cavity 4 is equipped in pump case 1, the cavity 4 is connected to pump inlet 2 and pump discharge 3；It is equipped in cavity 4
Rotatable vane rotor 5；5 lower end of vane rotor stretches out cavity 4 and extends to pump case 1；Vane rotor 5 stretches out pump case
1 part is connect by sealing element 6 and bearing 7 with pump case 1, and 5 bottom of vane rotor connects motor 8.Sealing element can be with
It is bio-compatibility Glan circle and gasket etc..
There are a groove, sealing element 6 and bearings 7 to be fastened in the groove for 1 bottom outer surface of pump case；Sealing
Part 6 is located at the upper end of bearing 7, and is bonded with the top of groove.
The groove be it is ladder-like, the internal diameter of upper end is less than the internal diameter of lower end；The sealing element 6 is located at the upper end of groove,
Bearing 7 is located at the lower end of groove, and the bottom of bearing 7 is concordant with the bottom of groove.
The vane rotor 5 include several blades 501, deflection cone 502, boss 503 and axis 504, and several blades 501,
There are spacing between the peripheral wall of cavity 4 for deflection cone 502 and boss 503；The position phase of the deflection cone 502 and pump inlet 2
It is corresponding, and there are spacing between the two；The deflection cone 502, several blades 501 and boss 503 are set gradually from top to bottom, and
It is both adjacent to be fixedly connected；504 upper end of axis at least sequentially passes through columned through-hole among boss 503 and several under
The region that blade 501 surrounds is connect with 502 bottom of deflection cone；The lower end of axis 504 stretches out cavity 4 and extends to pump case 1；Axis 504
Position positioned at 4 lower section of cavity is connect with 1 gap of pump case.There are spacing between columned through-hole and axis.Deflection cone, blade
Be fixedly connected with composition rotating part with boss, when processing, can process axis and boss together, then by blade and boss, deflection cone and
Blade passes through laser welding.
Several blades 501 are uniformly distributed along 502 bottom cylindrical week of deflection cone, and several blades 501, deflection cone 502 and axis
504 constitute " umbrella " shape；Several blades 501 all extend to outside boss 503；The position that pump case 1 is stretched out in 504 lower end of axis passes through
Sealing element 6 and bearing 7 are connect with pump case 1, and the bottom of axis 504 connects motor 8 by shaft coupling 9.
The boss 503 is cyclic annular, and the internal diameter of boss 503 is greater than the diameter of axis 504；The upper end of axis 504 and deflection cone 502
It is integrally formed；Axis 504 is located at the position of 4 lower section of cavity and 1 gap of pump case is 0.05 μm.
503 upper surface of boss is tilted down from centre to edge, and the lateral surface of boss 503 is the up big and down small conical surface；Blood
Impeller of pump diameter is 60mm；The inner circumferential of boss 503 is cylindrical surface.
503 lateral surface of boss and the junction of lower surface, the junction of inner peripheral surface and lower surface, inner peripheral surface and upper table
The junction in face is equipped with rounding.
The cavity 4 is up big and down small ladder-like.
The pump inlet 2 is located at the top of pump case 1, and pump discharge 3 is located at the side of pump case 1.
The total quantity of above-mentioned blade 501 is 5.
The working process of this embodiment is as follows:
The rotation of 8 drive shaft 504 of motor, and then deflection cone 502 and blade 501 is driven to rotate.In the process of running, blood from
Pump inlet 2 flows into, and due to the centrifugal force that the rotation of blade 501 generates, blood flows to pump discharge 3, completes blood flow process.At this
During a, due to there is gap between the circular through hole at 503 center of axis 504 and boss, blood can between the two clearance flow
Out, increase fluid to wash away 503 centered cylinder wall surface of boss and 504 surface of axis.The fluid edge of 503 bottom of boss is driven simultaneously
Gap between boss 503 and axis 504 flows up.It avoids blood from being trapped in 503 bottom of boss, is further reduced the shape of thrombus
At.
Compare magnetic suspension pump, and the external blood pump of haemolysis can be reduced described in the present embodiment, using there is the pump of axis 504, adds
Work technique is simpler, without complicated control system, and runs highly stable.Since sealing element 6 and bearing 7 are all placed on pump
In lower casing (pump case bottom is far from 4 side of cavity), not with contacting blood, it can avoid the problem of bearing 7 is to the abrasion of blood, have
Effect reduces the generation of haemolysis.Because bearing 7 is placed on except blood, 7 material of bearing does not need expensive special substance, has
Effect reduces 7 cost of bearing.Meanwhile existing processing technology can control the spacing between axis 504 and pump lower casing at 0.05 μm,
And the average diameter of red blood cell is 7-8 μm, red blood cell cannot be introduced into axis 504 and pump the gap between lower casing, reduce haemolysis and blood
The generation of bolt.The external blood pump that haemolysis can be reduced described in the present embodiment is more slightly larger than the volume of general electromagnetic levitation type blood pump, but
Revolving speed is smaller, and lift can be effectively ensured, and reduces abrasion of the blade 501 to red blood cell, reduces haemolysis to the full extent.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. the external blood pump that one kind can reduce haemolysis, it is characterised in that: including pump case (1)；Pump case (1) be equipped with pump into
Mouth (2) and pump discharge (3)；A cavity (4) are equipped in pump case (1), the cavity (4) and pump inlet (2) and pump discharge (3) are even
It is logical；Rotatable vane rotor (5) are equipped in cavity (4)；Vane rotor (5) lower end is stretched out cavity (4) and is extended to outside pump
Shell (1)；The part that vane rotor (5) stretches out pump case (1) is connect by sealing element (6) and bearing (7) with pump case (1), and
Vane rotor (5) bottom connects motor (8).
2. the external blood pump according to claim 1 that haemolysis can be reduced, it is characterised in that: pump case (1) bottom
There are a groove, sealing element (6) and bearings (7) to be fastened in the groove for outer surface；Sealing element (6) is located at bearing (7)
Upper end, and be bonded with the top of groove.
3. the external blood pump according to claim 2 that haemolysis can be reduced, it is characterised in that: the groove be it is ladder-like,
The internal diameter of upper end is less than the internal diameter of lower end；The sealing element (6) is located at the upper end of groove, and bearing (7) is located at the lower end of groove, and
The bottom of bearing (7) is concordant with the bottom of groove.
4. the external blood pump according to claim 1 that haemolysis can be reduced, it is characterised in that: vane rotor (5) packet
Include several blades (501), deflection cone (502), boss (503) and axis (504), and several blades (501), deflection cone (502) and
There are spacing between the peripheral wall of cavity (4) for boss (503)；The deflection cone (502) is opposite with the position of pump inlet (2)
It answers, and there are spacing between the two；The deflection cone (502), several blades (501) and boss (503) are successively set from top to bottom
It sets, and adjacent the two is fixedly connected；Axis (504) upper end boss (503) is at least sequentially passed through under if intermediate through-hole and
The region that cured leaf piece (501) surrounds is connect with deflection cone (502) bottom；The lower end of axis (504) is stretched out cavity (4) and is extended to outside pump
Shell (1)；Axis (504) is located at the position below cavity (4) and connect with pump case (1) gap.
5. the external blood pump according to claim 4 that haemolysis can be reduced, it is characterised in that: lead on several blades (501) edges
Flow cone (502) bottom cylindrical week is uniformly distributed, and several blades (501), deflection cone (502) and axis (504) constitute " umbrella " shape；If
Cured leaf piece (501) all extends to boss (503) outside；The position that pump case (1) is stretched out in axis (504) lower end passes through sealing element
(6) it is connect with bearing (7) with pump case (1), and the bottom of axis (504) passes through shaft coupling (9) connection motor (8).
6. the external blood pump according to claim 4 that haemolysis can be reduced, it is characterised in that: the boss (503) is cyclic annular,
And the internal diameter of boss (503) is greater than the diameter of axis (504)；The upper end of axis (504) and deflection cone (502) integrated molding or detachable
Connection；Axis (504) is located at position below cavity (4) and pump case (1) gap is 0.02-0.2 μm.
7. the external blood pump of haemolysis can be reduced according to claim 4 or 6, it is characterised in that: boss (503) upper surface
It is tilted down from centre to edge, the lateral surface of boss (503) is the up big and down small conical surface；Blood pump impeller diameter is 40-80mm.
8. the external blood pump according to claim 7 that haemolysis can be reduced, it is characterised in that: on the outside of the boss (503)
The junction of face and lower surface, the junction of inner peripheral surface and lower surface, inner peripheral surface and upper surface junction be equipped with rounding.
9. the external blood pump according to claim 1 that haemolysis can be reduced, it is characterised in that: the cavity (4) is upper big
Under it is small ladder-like.
10. the external blood pump according to claim 1 that haemolysis can be reduced, it is characterised in that: the pump inlet (2) is located at
The top of pump case (1), pump discharge (3) are located at the side of pump case (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820555905.9U CN209301837U (en) | 2018-04-18 | 2018-04-18 | A kind of external blood pump that can reduce haemolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820555905.9U CN209301837U (en) | 2018-04-18 | 2018-04-18 | A kind of external blood pump that can reduce haemolysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209301837U true CN209301837U (en) | 2019-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820555905.9U Active CN209301837U (en) | 2018-04-18 | 2018-04-18 | A kind of external blood pump that can reduce haemolysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108785770A (en) * | 2018-04-18 | 2018-11-13 | 清华大学天津高端装备研究院 | A kind of external blood pump that can reduce haemolysis |
| CN114450057A (en) * | 2019-10-03 | 2022-05-06 | 波士顿科学国际有限公司 | Blood pump for reducing thrombosis |
-
2018
- 2018-04-18 CN CN201820555905.9U patent/CN209301837U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108785770A (en) * | 2018-04-18 | 2018-11-13 | 清华大学天津高端装备研究院 | A kind of external blood pump that can reduce haemolysis |
| CN114450057A (en) * | 2019-10-03 | 2022-05-06 | 波士顿科学国际有限公司 | Blood pump for reducing thrombosis |
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