WO2022262242A1

WO2022262242A1 - Blood pump

Info

Publication number: WO2022262242A1
Application number: PCT/CN2021/140543
Authority: WO
Inventors: 高琪; 何博; 刘星利; 魏润杰
Original assignee: 浙江迪远医疗器械有限公司
Priority date: 2021-06-15
Filing date: 2021-12-22
Publication date: 2022-12-22
Also published as: JP7426503B2; JP2023534345A; CN115474950A

Abstract

The present application discloses a blood pump. The blood pump comprises: a housing having an accommodation cavity; an outlet provided on one end of the housing; an impeller at least partially rotatably provided in the accommodation cavity and used for pushing blood in the accommodation cavity to flow out from the outlet; a driving device comprising a body and a driving shaft, the driving shaft being rotatably provided on the body, the driving shaft being connected to the impeller, and the driving device being used for driving, by means of the driving shaft, the impeller to rotate; and an assistance structure provided on the impeller and/or the driving device and used for enabling blood in a first space to flow, the first space being a space formed between the impeller and the body, and the first space being located outside the accommodation cavity. In the blood pump of the present application, the assistance structure enables the blood in the first space to flow, such that the flow rate of the blood in the first space can be increased, thus the risk of clotting of the blood in the first space can be reduced, thereby improving the safety of usage of the blood pump.

Description

blood pump

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202110661223.2 and a filing date of June 15, 2021, and claims the priority of this Chinese patent application. The content of this Chinese patent application is hereby incorporated into this application by reference.

Background technique

The blood pump is generally used to promote the normal blood circulation of the medical object during the operation. When the medical object undergoes heart-related operations, the blood of the medical object can still circulate normally.

At present, blood pumps are mainly axial pumps, and the driving device drives the impeller to rotate to provide the set flow and pressure. In related technologies, blood pumps have a high risk of thromboembolism, stroke and other problems. The safety of blood pumps lower.

Contents of the invention

In view of this, an embodiment of the present application provides a blood pump.

In order to achieve the above object, the technical solution of the present application is achieved in this way:

An embodiment of the present application provides a blood pump, and the blood pump includes:

The housing has an accommodation chamber;

the outlet is arranged at one end of the housing;

an impeller, at least partially rotatably disposed in the accommodating cavity, for pushing the blood in the accommodating cavity to flow out from the outlet;

The drive device includes a body and a drive shaft; the drive shaft is rotatably arranged on the body, and the drive shaft is connected to the impeller; the drive device is used to drive the impeller to rotate through the drive shaft;

The auxiliary structure is arranged on the impeller and/or the driving device, and is used to make the blood in the first space flow; the first space is the space formed between the impeller and the body, and the first space is located out of the chamber.

In some optional implementations, the impeller includes:

a seat, located outside the accommodating cavity, forming the outlet with the first end of the housing;

The auxiliary structures include:

The guide channel is arranged on the seat, communicates with the accommodating chamber and the first space respectively, and is used for conducting the blood in the accommodating chamber and the blood in the first space.

In some optional implementations, the cross-sectional shape of the guide channel is circular or strip-shaped; and/or,

The auxiliary structure includes at least two flow guide channels, and the at least two flow guide channels are arranged in a ring shape or in a radial shape.

In some optional implementation manners, the guide channel is arranged obliquely, a first axis is formed between the first port of the guide channel and the outlet, and the first axis and the axis of the guide channel The parallel condition is satisfied, wherein the first port of the flow guide channel is a port of the flow guide channel on the side of the accommodation chamber.

In some optional implementation manners, the flow guide channel communicates with the outer surface of the seat and the inner surface of the seat, the outer surface of the seat refers to the surface facing the body, the seat The inner surface of the portion refers to the surface facing the accommodating cavity.

In some optional implementation manners, the flow guide channel is close to the connection between the seat and the drive shaft; the aperture of the flow guide channel is smaller than a second set value.

In some optional implementations, the auxiliary structure includes:

The stirring mechanism is rotatably arranged in the first space, and is used to promote blood flow in the first space.

In some optional implementations, the agitation mechanism includes a protruding structure arranged on the impeller and/or the drive shaft; and/or

The agitating mechanism includes a concave structure disposed on the impeller and/or the drive shaft.

In some optional implementations, the stirring mechanism includes:

The auxiliary impeller is rotatably arranged in the first space.

In some optional implementation manners, the stirring mechanism is in contact with or forms a first gap with the outer surface of the impeller; the outer surface of the impeller refers to the surface facing the body.

In some optional implementations, the stirring mechanism includes:

At least two protrusions are arranged on the outer surface of the impeller in the shape of a spiral plate, and are used to make the blood in the first space have an axial flow velocity.

In some optional implementation manners, the root of the protrusion is in contact with or connected to the drive shaft, and the end of the protrusion is flush with the edge of the impeller.

In some optional implementations, the impeller includes:

The auxiliary structures include:

The first guide part is arranged on the outer surface of the seat part, and the cross-sectional area decreases as it moves away from the outlet side, and is used to make the blood in the first space move along the surface of the first guide part to the flow at the outlet.

In some optional implementation manners, the width between the seat and the body gradually increases from the middle of the seat to the edge of the impeller.

In some optional implementation manners, the first guide part is in the shape of a cone.

In some optional implementations, the auxiliary structure includes:

The second guide part is arranged at the first end of the body, and the cross-sectional area increases as it moves away from the outlet side, and is used to make the blood in the first space pass through the surface of the second guide part along the surface of the second guide part. The surface flow of the body.

In some optional implementation manners, the impeller makes the blood in the accommodation cavity flow from the first end of the blood pump to the second end of the blood pump; the auxiliary structure makes the blood in the first space flow Blood flows from the second end of the blood pump to the first end of the blood pump.

The blood pump in the embodiment of the present application includes: a housing with a housing chamber; an outlet disposed on one side of the housing; an impeller at least partially rotatably disposed in the housing chamber for pushing the housing The blood in the cavity flows out from the outlet; the drive device includes a body and a drive shaft; the drive shaft is rotatably arranged on the body, and the drive shaft is connected to the impeller; the drive device is used to pass through the The drive shaft drives the impeller to rotate; the auxiliary structure is arranged on the impeller and/or the driving device, and is used to make the blood in the first space flow; the first space is formed between the impeller and the body space, the first space is located outside the accommodating cavity; the blood flow in the first space can increase the flow velocity of the blood in the first space through the auxiliary structure, thereby reducing the risk of blood coagulation in the first space risk, increasing the safety of blood pump use.

Description of drawings

FIG. 1 is an optional structural schematic diagram of a blood pump in the prior art;

Fig. 2 is a schematic structural diagram of an optional blood pump provided in the embodiment of the present application;

FIG. 3 is a schematic diagram of an optional partial structure of a blood pump provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of an optional partial structure of a blood pump provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of an optional partial structure of a blood pump provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of an optional partial structure of a blood pump provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 8 is a schematic diagram of an optional partial structure of a blood pump provided in the embodiment of the present application;

FIG. 9 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 10 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 11 is a schematic structural diagram of an optional blood pump provided by the embodiment of the present application;

Fig. 12 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 13 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 14 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 15 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 16 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 17 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 18 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 19 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 20 is a schematic structural diagram of an optional blood pump provided by the embodiment of the present application;

Fig. 21 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 22 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 23 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 24 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 25 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 26 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 27 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 28 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 29 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 30 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 31 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 32 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 33 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 34 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 35 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application;

Fig. 36 is a schematic diagram of an optional partial structure of the blood pump provided by the embodiment of the present application.

Reference numerals: 101, outlet; 102, inlet; 103, first space; 110, shell; 112, opening; 120, impeller; 121, connecting portion; 122, blade; 123, seat; 124, diversion channel 125, the first guide part; 131, the drive shaft; 132, the body; 1321, the second guide part; 1322, the columnar part; 140, the stirring mechanism.

detailed description

The specific technical features in each embodiment described in the specific implementation modes can be combined in various ways if there is no contradiction. For example, different implementation modes can be formed by combining different specific technical features. Necessary repetition, various possible combinations of specific technical features in this application will not be further described.

In the description of the embodiments of the present application, it should be noted that unless otherwise stated and limited, the term "connection" should be understood in a broad sense, for example, it can be an electrical connection, it can also be the internal communication of two components, and it can be a direct connection , can also be indirectly connected through an intermediary, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

It should be noted that the term "first\second\third" involved in the embodiment of this application is only to distinguish similar objects, and does not represent a specific ordering of objects. Understandably, "first\second\ "Third" can be interchanged for a specific order or sequence where allowed. It should be understood that the objects distinguished by "first\second\third" can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in sequences other than those illustrated or described herein.

The blood pump includes: a housing 110, an outlet 101, an impeller 120, a driving device and auxiliary structures. The housing 110 has an accommodating cavity; the outlet 101 is disposed at one end of the housing 110; the impeller 120 is at least partly rotatably disposed in the accommodating cavity, and the impeller 120 is used to push the blood in the accommodating cavity to flow out from the outlet 101 The drive device includes a body 132 and a drive shaft 131; the drive shaft 131 is rotatably arranged on the body 132, and the drive shaft 131 is connected to the impeller 120; the drive device is used to pass the drive shaft 131 Drive the impeller 120 to rotate; the auxiliary structure is arranged on the impeller 120 and/or the driving device, and the auxiliary structure is used to make the blood in the first space 103 flow; the first space 103 is the impeller 120 and the body 132, the first space 103 is located outside the receiving cavity; when the drive shaft 131 drives the impeller 120 to rotate, the impeller 120 pushes blood to flow out from the outlet 101, so The auxiliary structure makes the blood flow in the first space 103; the blood flow in the first space 103 can increase the flow velocity of the blood in the first space 103 through the auxiliary structure, thereby reducing the risk of blood coagulation in the first space 103 risk, increasing the safety of blood pump use.

In the embodiment of the present application, the blood pump is an interventional blood pump. During the working process, the blood pump is generally placed in the living body, and there is blood flow inside and outside the accommodating cavity. The blood outside the accommodation cavity has a set pressure; the first space 103 is located outside the accommodation cavity, and the first space 103 is located in the living body, where the blood flow rate is low; coagulation is prone to occur and affect the safety of the living body.

In the embodiment of the present application, as shown in FIG. 1 , if there is no auxiliary structure and the drive shaft 131 drives the impeller 120 to rotate, the blood flow rate in the first space 103 is low. When the blood pump runs for a long time When the blood coagulation occurs easily at the driving shaft 131, the flow state of the blood will be changed, hindering the normal operation of the blood pump, and reducing the flow rate of the blood pump; when the thrombus volume caused by coagulation is large, the blood pump will fail, resulting in thromboembolism and stroke. and other issues that affect the safety of patients.

In the embodiment of the present application, the structure of the housing 110 is not limited, as long as the housing 110 has a receiving cavity, so that blood can flow in the receiving cavity. For example, the casing 110 is a cylindrical structure.

Here, the shape of the accommodation cavity is not limited. For example, the accommodating cavity may be a columnar structure.

Here, the casing 110 may have an opening 112 , and the opening 112 communicates with the receiving cavity, so that at least part of the impeller 120 is rotatably disposed in the receiving cavity through the opening 112 .

Here, the housing 110 may also have an inlet 102 , and the inlet 102 communicates with the accommodating chamber, so that blood can enter the accommodating chamber from the inlet 102 .

In the embodiment of the present application, the outlet 101 is disposed at one end of the housing 110 , and the outlet 101 may be disposed on the housing 110 or outside the housing 110 . For example, as shown in FIG. 2 , the impeller 120 may include: a seat 123 located outside the accommodating cavity, and the seat 123 and the first end of the housing 110 form the outlet 101 . Here, the structure of the seat portion 123 is not limited. For example, the seat portion 123 may be in the shape of a conical cone, so that the seat portion 123 can provide guidance for the blood in the accommodating cavity.

In the embodiment of the present application, the structure of the impeller 120 is not limited, as long as the impeller 120 can rotate to push the blood in the accommodating chamber to flow out from the outlet 101 .

For example, as shown in FIG. 3 , the impeller 120 includes a connection portion 121 , blades 122 and a seat portion 123 . The blade 122 is fixed on the outside of the connecting portion 121, and the seat portion 123 is arranged on the second end of the connecting portion 121, so that the seat portion 123 and the first end of the housing 110 form the outlet 101, and the seat portion 123 is connected with the drive shaft 131, and the driving The shaft 131 is located outside the receiving cavity.

In this example, the structure of the connecting portion 121 is not limited. For example, the connection part 121 may be a columnar structure. For another example, the connection part 121 may include a first end and a second end. The first end of the connecting portion 121 has a tapered structure, and the first end of the connecting portion 121 is close to the inlet 102 so as to guide the blood through the first end of the connecting portion 121 . The second end of the connecting portion 121 is in a columnar structure. A portion between the first end of the connecting portion 121 and the second end of the connecting portion 121 is in a columnar structure, so that the portion between the first end and the second end is connected to the blade 122 .

In this example, the structure of the blade 122 is not limited. For example, the blade 122 can be a flat plate structure, or a bent plate structure. The blades 122 may be blades 122 of equal height, or blades 122 of unequal height. As an example, the height of the blade 122 gradually increases from the leading edge of the blade 122 to the trailing edge of the blade 122;

In this example, the number of blades 122 is not limited. For example, the number of blades 122 may be one or two.

As an example, the impeller 120 may further include: at least one blade 122, at least one blade 122 is fixed on the peripheral side of the connecting portion 121, and at least one blade 122 is used to push blood flow; the drive shaft 131 drives the When the impeller 120 rotates, the blades 122 are used to push the blood to flow from the first end of the connecting part 121 to the second end of the connecting part 121 .

In the embodiment of the present application, the structure of the driving device is not limited, as long as the driving device includes a driving shaft 131 . For example, the drive means may comprise an electric motor.

Here, the structure of the body 132 is not limited. For example, the body 132 may be a columnar structure. As an example, the body 132 may be the body 132 of the motor, and the driving shaft 131 may be the output shaft of the motor.

Here, the implementation manner of connecting the drive shaft 131 to the impeller 120 is not limited. For example, the impeller 120 and the drive shaft 131 may be connected by splines or flat keys. For another example, the impeller 120 and the driving shaft 131 may be connected by welding.

Here, the driving device is connected to the impeller 120 through the driving shaft 131 , so that the impeller 120 is rotatably disposed in the accommodating cavity.

In the embodiment of the present application, the structure of the auxiliary structure is not limited, as long as the auxiliary structure can increase the blood flow rate in the first space 103 . For example, in the case of no auxiliary structure, the flow velocity of the blood in the first space 103 is V1; in the case of setting the auxiliary structure, the flow velocity of the blood in the first space 103 is V2; The blood in the first space 103 flows, at this time, V2 is greater than V1; thus the risk of blood coagulation in the first space 103 can be reduced, and the safety of the blood pump can be improved.

Here, the value of the flow velocity of the blood in the first space 103 is not limited.

For example, the auxiliary structure is used to make the flow velocity of the blood in the first space 103 greater than a first set value.

Here, the first set value may be a flow rate at which blood does not coagulate in the first space. The first set value is not limited. For example, the first set value may be greater than or equal to 0.5m/s. As an example, the first set value is 1 m/s or 2 m/s.

Here, the auxiliary structure may be provided on the impeller 120, may also be provided on the driving device, and may be provided on both the impeller 120 and the driving device.

In the embodiment of the present application, the impeller 120 is used to push the blood out of the outlet 101, and the auxiliary structure is used to make the blood flow in the first space 103; the auxiliary structure can increase the blood flow in the first space 103. The risk of blood coagulation in the first space 103 is reduced by increasing the flow rate of the blood, which improves the safety of the blood pump.

Here, the first space 103 is the space formed between the impeller 120 and the body 132, and refers to the space between the largest section of the impeller 120 near the side of the body 132 and the largest section of the body 132 near the side of the impeller 120, as shown in FIG. 11 and FIG. 20, the first space 103 is surrounded by the outer surface of the impeller 120, the outer surface of the body 132 and the dotted line.

In some optional implementations of the embodiment of the present application, the auxiliary structure may include: a flow guide channel 124, which is provided on the seat 123, and the flow guide channel 124 is connected to the accommodating cavity and the The first space 103 is in communication; it is used to connect the blood in the accommodating cavity with the blood in the first space 103; the blood in the first space 103 can flow, so that the flow in the first space 103 can be increased through the guide channel 124 The risk of blood coagulation in the first space 103 is reduced by increasing the flow rate of the blood, which improves the safety of the blood pump.

In this implementation manner, the blood flow direction in the first space 103 is not limited.

For example, as shown in FIG. 2 , when the drive shaft 131 drives the impeller 120 to rotate, the blood in the first space 103 flows into the accommodating cavity from the flow guiding channel 124 , and the impeller 120 Pushing the blood flowing into the accommodating chamber to flow out from the outlet 101, so that the blood in the first space 103 can flow through the guide channel 124, which can increase the flow velocity of the blood in the first space 103 and reduce the flow rate of the blood in the first space 103. The risk of condensation in the space 103 increases the safety of blood pump use.

In this example, no other structures for promoting blood flow are arranged in the first space 103 .

In this example, when the drive shaft 131 drives the impeller 120 to rotate, a large negative pressure is generated near the outlet 101 in the accommodation chamber, and the pressure in the first space 103 is greater than the pressure in the accommodation chamber near the outlet 101, causing the second The blood in a space 103 enters the accommodating cavity through the guide channel 124, and then flows obliquely from the outlet 101 along the seat 123 under the push of the impeller 120, so that the blood flow rate near the drive shaft 131 is greatly increased, which can effectively reduce blood coagulation happened.

In this example, the impeller 120 makes the blood in the receiving chamber flow from the first end of the blood pump to the second end of the blood pump; the auxiliary structure makes the blood in the first space 103 flow from The second end of the blood pump flows toward the first end of the blood pump; the blood in the two spaces finally flows out from the outlet 101 in substantially opposite directions.

For another example, when the drive shaft 131 drives the impeller 120 to rotate, the blood in the accommodating cavity flows into the first space 103 from the flow guiding channel 124, and the impeller 120 pushes the blood in the accommodating cavity Part of the blood flows out from the outlet 101, and the impeller 120 pushes another part of the blood in the accommodating cavity to flow out of the first space 103 through the flow guide channel 124; so that the blood in the first space 103 can flow through the flow guide channel 124, which can Increasing the flow velocity of the blood in the first space 103 reduces the risk of blood coagulation in the first space 103 and improves the safety of the blood pump.

In this example, other mechanisms for promoting blood flow are arranged in the first space 103 .

In this example, when the drive shaft 131 drives the impeller 120 to rotate and the mechanism for promoting blood flow in the first space 103 works, the pressure in the first space 103 is lower than the pressure in the chamber near the outlet 101, causing the chamber to contain The blood in the cavity enters the first space 103 through the guide channel 124, and then flows under the push of the mechanism promoting blood flow, so that the blood flow rate near the drive shaft 131 is greatly increased, which can effectively reduce the occurrence of coagulation.

In this example, the structure of the mechanism for promoting blood flow is not limited. For example, the structure of the mechanism that promotes blood flow is the agitation mechanism 140 .

In this implementation manner, the cross-sectional shape of the flow guiding channel 124 is not limited. For example, the cross-sectional shape of the flow guide channel 124 may be circular, strip-shaped, rectangular, or triangular.

In this implementation manner, the diameter of the guide channel 124 is not limited. For example, the diameter of the guide channel 124 is smaller than or equal to the second set value. As an example, the second set value may be 1 mm.

In this implementation manner, the number of flow guide channels 124 is not limited. For example, the number of the guide channel 124 may be one or multiple.

As an example, the auxiliary structure may include at least two flow guide channels 124, and the at least two flow guide channels 124 are arranged in a ring. The at least two guide channels 124 may also be arranged radially. When the at least two flow guide channels 124 are arranged in a ring, the at least two flow guide channels 124 may be arranged in a circle, as shown in FIG. 3 and FIG. 4 . The at least two guide channels 124 may be arranged in two turns, as shown in FIG. 5 and FIG. 6 . When the at least two air guiding channels 124 are arranged radially, the at least two air guiding channels 124 may include four bar-shaped air guiding channels 124, and the four bar-shaped air guiding channels 124 are arranged radially. cloth, as shown in Figure 7 and Figure 8.

In this implementation manner, as shown in FIG. 9 and FIG. 10 , the flow guide channel 124 may be arranged obliquely, and the direction of inclination of the flow guide channel 124 is not limited. For example, a first axis is formed between the first port of the flow guide channel 124 and the outlet 101, and the first axis and the axis of the flow guide channel 124 meet the parallel condition, wherein the flow guide channel 124 The first port of the guide channel 124 is the port on the side of the accommodation chamber, so that the blood in the first space 103 can enter the accommodation chamber more easily through the guide channel 124 and directly flow out from the outlet 101 . Here, the parallel condition means parallel or substantially parallel; the axis of the flow guide channel 124 is the same as the guide of the flow guide channel 124 . Of course, the guide channel 124 may not be inclined, and the opening of the guide channel 124 may also be arranged perpendicular to the outer surface of the seat portion 123 .

In this implementation manner, the setting position of the flow guiding channel 124 on the seat portion 123 is not limited. The guide channel can communicate with the outer surface of the seat and the inner surface of the seat, the outer surface of the seat refers to the surface facing the body, and the inner surface of the seat refers to the surface facing the body. the surface of the cavity.

For example, the guide channel can only be arranged in the seat, and not in other structural parts; when the seat is connected to the drive shaft, the guide channel is not arranged on the drive shaft, nor is the guide channel arranged on the drive shaft and the drive shaft. The junction position of the seat.

As an example, as shown in FIG. 4 , the flow guide channel 124 may be located at the edge side of the seat portion 123 .

As yet another example, the flow guide channel 124 may be located in the middle of the seat portion 123 .

As yet another example, as shown in FIG. 24 and FIG. 25 , the guide channel 124 is close to the junction of the seat portion 123 and the drive shaft 131 , and the junction of the drive shaft 131 and the seat portion 123 is in phase with the guide channel 124 . Adjacent to the arrangement, so that the blood flowing through the guide channel 124 can directly flow through the outer surface of the drive shaft 131 in the first space and wash the outer surface of the drive shaft 131 in the first space, greatly reducing the outer surface of the drive shaft 131. Possibility of surface clotting.

In some optional implementations of the embodiments of the present application, as shown in FIG. 11 , the auxiliary structure may include: an agitation mechanism 140, which is rotatably arranged in the first space 103, and the agitation mechanism 140 is used for To promote the blood flow in the first space 103; the agitation mechanism 140 can increase the flow velocity of the blood in the first space 103, reduce the risk of blood coagulation in the first space 103, and improve the safety of the blood pump.

In this implementation manner, a stirring mechanism 140 is provided in the first space 103 . When the drive shaft 131 drives the impeller 120 to rotate, the agitation mechanism 140 rotates in the first space, the impeller 120 plays a role in pumping blood, and the rotation of the agitation mechanism 140 can increase the blood flow near the drive shaft 131, thereby reducing The risk of blood coagulation near the drive shaft 131; at the same time, the rotation of the stirring mechanism 140 can further improve the blood pumping efficiency of the blood pump.

In this implementation manner, the rotation direction of the stirring mechanism 140 and the rotation direction of the impeller 120 may be the same.

In this implementation manner, the installation position of the stirring mechanism 140 is not limited. For example, the stirring mechanism 140 may be disposed on the impeller 120 ; as an example, the stirring mechanism 140 is disposed on the seat portion 123 of the impeller 120 . For another example, the stirring mechanism 140 may be disposed on the driving shaft 131 . For another example, the agitating mechanism 140 is disposed on both the impeller 120 and the driving shaft 131 .

In this implementation manner, the structure of the stirring mechanism 140 is not limited. For example, the stirring mechanism 140 may include a convex structure or a concave structure disposed on the impeller 120 . For another example, the stirring mechanism 140 may include a protruding structure or a concave structure disposed on the driving shaft 131 .

Example 1, the stirring mechanism 140 may include: an auxiliary impeller. The auxiliary impeller is rotatably arranged in the first space 103; when the drive shaft 131 drives the impeller 120 to rotate, the impeller 120 pushes the blood in the accommodating chamber to flow out from the outlet 101, the The auxiliary impeller pushes the blood in the first space 103 to flow; thereby increasing the flow velocity of the blood in the first space 103 and reducing the risk of blood coagulation in the first space 103, improving the safety of the blood pump.

In Example 1, the structure of the auxiliary impeller is not limited.

For example, the auxiliary impeller may be an axial impeller, a backward centrifugal impeller or a forward centrifugal impeller. When the auxiliary impeller is an axial flow impeller, the shape of the auxiliary impeller may be forward curved, radial, single plate, airfoil, etc. When the auxiliary impeller is a backward centrifugal impeller, the shape of the auxiliary impeller can be single plate type, arc type, airfoil type, etc. When the auxiliary impeller is a forward centrifugal impeller, the shape of the auxiliary impeller may be a flat blade, a narrow arc blade, an arc blade, an airfoil blade or a flat curved backward blade.

As an example, the auxiliary impeller may include auxiliary blades, through which the blood in the first space 103 may be pushed to flow.

Here, the number of auxiliary blades is not limited. For example, the number of auxiliary blades may be one or multiple, as shown in FIG. 13 , FIG. 15 , FIG. 17 and FIG. 19 .

Here, the shape of the auxiliary blade is not limited. For example, the auxiliary blade may be a straight plate-shaped structure. For another example, as shown in FIG. 13 , FIG. 15 , FIG. 17 and FIG. 19 , the auxiliary vanes may be in the shape of a bent plate.

In Example 1, the manner in which the auxiliary impeller is rotatably disposed in the first space 103 is not limited. For example, the auxiliary impeller can be fixed to the driving shaft 131 so that the auxiliary impeller can be driven to rotate through the driving shaft 131 . For another example, the auxiliary impeller may be fixed to the impeller 120 so as to drive the auxiliary impeller to rotate through the impeller 120 .

In this implementation manner, the distance between the stirring mechanism 140 and the impeller 120 is not limited.

For example, the stirring mechanism 140 is in contact with the outer surface of the impeller 120, as shown in Figure 12 and Figure 14, the outer surface of the impeller 120 refers to the surface towards the body 132, so that the setting of the stirring mechanism 140 can be reduced. space.

For another example, a first gap is formed between the agitation mechanism 140 and the outer surface of the impeller 120, as shown in Figure 16 and Figure 18, where, when the agitation mechanism 140 pushes the blood to flow, the blood in the first gap will Flow along the axial direction of the rotation of the stirring mechanism 140, so that the blood in the first space 103 can not only flow out of the first space, but also flow in the axial direction of the rotation of the stirring mechanism 140, which can further reduce the blood flow in the first space 103. The risk of clotting increases the safety of blood pump use.

It should be noted that Fig. 12 and Fig. 13 are a set of diagrams of the same structure, and Fig. 13 is a bottom view of Fig. 12 . Fig. 14 and Fig. 15 are a group of diagrams of the same structure, and Fig. 15 is a bottom view of Fig. 14 . Fig. 16 and Fig. 17 are a group of diagrams of the same structure, and Fig. 17 is a bottom view of Fig. 16 . Fig. 18 and Fig. 19 are a group of diagrams of the same structure, and Fig. 19 is a bottom view of Fig. 18 .

Example 2, the stirring mechanism 140 may include: at least two protrusions, at least two protrusions are arranged on the outer surface of the impeller 120; so that the first Blood flows in the space 103 ; here, the outer surface of the impeller 120 refers to the surface facing the body 132 .

In Example 2, when the impeller 120 includes a seat portion 123 , at least two protrusions are symmetrically disposed on the outer surface of the seat portion 123 .

In the second example, the shape of the raised portion is not limited.

For example, as shown in FIG. 26 , the protrusions are in a straight strip structure, and at least two protrusions are radial; here, the protrusions form a centrifugal stirring mechanism 140 .

For another example, as shown in Figure 27, Figure 28 and Figure 29, the raised portion may be in the shape of a spiral plate, and the raised portion is used to make the blood in the first space 103 have an axial flow velocity; here, the raised portion forms Axial flow agitation mechanism 140; here, the protruding part can push the blood to flow along the axial direction of the drive shaft 131, and the protruding part can push the blood to flow centrifugally along the radial direction of the drive shaft 131; The raised part can not only make the blood flow through the surface of the driving shaft 131, but also make the blood in the first space 103 flow out from the first space 103; it can not only reduce the risk of blood coagulation on the surface of the driving shaft 131, but also increase the volume of blood in the first space 103. pumping efficiency of the pump.

It should be noted that Fig. 27, Fig. 28 and Fig. 29 are views of different perspectives of the same structure.

In Example 2, the number of raised portions is not limited. For example, as shown in FIG. 26, the number of protrusions is four. For another example, as shown in FIG. 27 , FIG. 28 and FIG. 29 , the number of protrusions is two.

In the second example, the position of the root of the protrusion is not limited. For example, as shown in FIG. 26 and FIG. 29 , the root of the protrusion contacts or connects with the drive shaft 131 to prevent blood from coagulating between the root of the protrusion and the drive shaft 131 . Of course, a gap may also be formed between the root of the protrusion and the drive shaft 131 .

In the second example, the position of the end of the protrusion is not limited. For example, the end of the protrusion is flush with the edge of the impeller 120, so as to increase the installation volume of the protrusion and improve the efficiency of the protrusion to promote blood flow. Of course, the end of the protrusion can also be located between the edge of the impeller 120 and the middle of the impeller 120 .

The root of the protrusion refers to the end of the protrusion near the middle of the impeller 120 , and the end of the protrusion refers to the end of the protrusion away from the middle of the impeller 120 .

In some optional implementations of the embodiments of the present application, as shown in FIG. 20 and FIG. 21 , the auxiliary structure may include: a first guide part 125; the first guide part 125 is arranged outside the seat part 123 On the surface, the cross-sectional area of the first guide part 125 decreases as it moves away from the outlet 101 side, and the first guide part 125 is used to make the blood in the first space move toward all sides along the surface of the first guide part 125. When the drive shaft 131 drives the impeller 120 to rotate, the impeller 120 pushes the blood in the accommodating cavity to flow out from the outlet 101, and the blood in the first space 103 flows along the The surface of the first guiding part 125 flows toward the outlet 101, so that the blood in the first space 103 flows through the first guiding part 125, and the blood in the first space 103 and the blood at the outlet 101 The blood is collected in one place and driven to flow by the impeller 120 ; thus, the flow velocity of the blood in the first space 103 can be increased to reduce the risk of blood coagulation in the first space 103 , and improve the safety of the blood pump.

In this implementation, when the drive shaft 131 drives the impeller 120 to rotate, the first guide part 125 also rotates accordingly, because the cross-sectional area of the first guide part 125 decreases as it moves away from the outlet 101 side. Small, a centrifugal force will be formed at the first guide part 125, which increases the flow velocity of the blood in the first space at the seat part 123.

In this implementation, the width between the seat 123 and the body 132 gradually increases from the middle of the seat 123 to the edge of the seat 123; the first space forms an open space, which can The speed at which the blood in the first space flows to the outside of the first space is increased.

In this implementation manner, the structure of the first guide portion 125 is not limited, as long as the cross-sectional area of the first guide portion 125 decreases as it moves away from the outlet side. For example, the first guiding part 125 may be in the shape of a cone, so that the blood flows smoothly along the surface of the first guiding part 125 . For another example, the first guide portion 125 may also be in the shape of a pyramid.

In this implementation manner, the cross-sectional shape of the first guide portion 125 is not limited. For example, the cross-sectional shape of the first guide portion 125 may be circular, triangular, or rectangular.

As an example, the cross section of the first guide part 125 is circular; the outer diameter of the first guide part 125 gradually increase. For example, the outer surface of the first guiding portion 125 is a convex surface. For another example, the outer surface of the first guide portion 125 is a concave surface. For another example, the outer surface of the first guiding portion 125 is a planar surface.

In some optional implementations of the embodiment of the present application, as shown in FIG. 20 , the auxiliary structure may include: a second guide part 1321, the second guide part 1321 is arranged at the first end of the body 132, the second guide part 1321 The cross-sectional area of the second guide part 1321 increases as it moves away from the outlet side, and the second guide part 1321 is used to make the blood in the first space pass through the surface of the second guide part 1321 along the surface of the body. flow; when the driving shaft 131 drives the impeller 120 to rotate, the impeller 120 pushes the blood in the accommodating cavity to flow out from the outlet 101, and the blood in the first space 103 passes through the second The guiding effect of the surface of the guide part 1321 flows along the surface of the body, and the guiding function of the second guiding part 1321 increases the flow velocity of the blood in the first space 103, thereby reducing the flow of blood in the first space. The risk of coagulation within 103 improves the safety of blood pump use.

In this implementation manner, the structure of the second guide portion 1321 is not limited, as long as the cross-sectional area of the second guide portion 1321 increases as it moves away from the outlet side. For example, the second guide part 1321 may be in the shape of a cone, so that the blood flows smoothly along the surface of the second guide part 1321 . For another example, the second guide portion 1321 may also be in the shape of a pyramid.

In this implementation manner, the cross-sectional shape of the second guide portion 1321 is not limited. For example, the cross-sectional shape of the second guide portion 1321 may be circular, triangular, or rectangular.

As an example, the cross section of the second guide part 1321 is circular; increase. For example, the outer surface of the second guiding portion 1321 is a convex surface. For another example, the outer surface of the second guiding portion 1321 is a concave surface. For another example, the outer surface of the second guiding portion 1321 is a planar surface.

In this implementation, as shown in FIG. 20 , the body 132 may further include: a columnar portion 1322 connected to the second guide portion 1321 ; the drive shaft 131 drives the impeller 120 to rotate Next, the blood in the first space 103 flows along the surface of the columnar portion 1322 through the surface of the second guide portion 1321 , and more heat generated by the main body 132 can be taken away by the flowing blood.

It should be noted that the auxiliary structure may include at least one of the flow guiding channel 124 , the stirring mechanism 140 , the first guiding part 125 and the second guiding part 1321 . For example, as shown in FIG. 2 , the auxiliary structure only includes the flow guide channel 124 . For another example, as shown in FIGS. 12 and 14 , the auxiliary structure only includes the stirring mechanism 140 . For another example, as shown in FIG. 21 , the auxiliary structure only includes the first guide portion 125 . For another example, the auxiliary structure only includes the second guide portion 1321 . For another example, as shown in FIG. 22 and FIG. 23 , the auxiliary structure includes a flow guiding channel 124 and a stirring mechanism 140 . For another example, as shown in FIG. 20 , the auxiliary structure includes a first guide portion 125 and a second guide portion 1321 . For another example, as shown in FIG. 30 , FIG. 31 and FIG. 32 , the auxiliary structure includes a first guide portion 125 and a stirring mechanism 140 ; wherein, FIG. 30 , FIG. 31 and FIG. 32 are different perspective views of the same structure. For another example, as shown in FIG. 33 , the auxiliary structure includes a first guide portion 125 and a guide channel 124 . For another example, as shown in Figure 34, Figure 35 and Figure 36, the auxiliary structure includes a first guide part 125, a flow guide channel 124 and an agitation mechanism 140; wherein Figure 34, Figure 35 and Figure 36 are different perspective views of the same structure . For another example, the auxiliary structure includes a first guide part 125 , a second guide part 1321 , a flow guiding channel 124 and a stirring mechanism 140 .

It should be noted that the auxiliary structure includes a first guide part 125 and an agitation mechanism 140. In the case where the agitation mechanism 140 is a protruding structure provided on the impeller, the protruding structure protrudes from the surface of the first guide part 125; as shown in Figure 32 and Figure 36.

It should be noted that the direction of the arrow in the figure indicates the direction of blood flow.

The blood pump in the embodiment of the present application includes: a housing 110 with a housing chamber; an outlet 101 disposed on one side of the housing 110; an impeller 120 at least partially rotatably disposed in the housing chamber for Push the blood in the accommodating cavity to flow out from the outlet; the driving device includes a main body 132 and a driving shaft 131; connection; the driving device is used to drive the impeller 120 to rotate through the drive shaft 131; the auxiliary structure is arranged on the impeller 120 and/or the driving device, and is used to make the blood in the first space 103 flow; the The first space 103 is the space formed between the impeller 120 and the body 132, and the first space is located outside the accommodating chamber; when the drive shaft 131 drives the impeller 120 to rotate, the The impeller 120 pushes the blood to flow out from the outlet 101, and the auxiliary structure allows the blood in the first space 103 to flow; the auxiliary structure can increase the flow velocity of the blood in the first space 103 and reduce blood coagulation in the first space 103 risk, improving the safety of blood pump use.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A blood pump, wherein the blood pump includes:

The housing has an accommodation chamber;

the outlet is arranged at one end of the housing;

an impeller, at least partially rotatably disposed in the accommodating cavity, for pushing the blood in the accommodating cavity to flow out from the outlet;

The drive device includes a body and a drive shaft; the drive shaft is rotatably arranged on the body, and the drive shaft is connected to the impeller; the drive device is used to drive the impeller to rotate through the drive shaft;

The auxiliary structure is arranged on the impeller and/or the driving device, and is used to make the blood in the first space flow; the first space is the space formed between the impeller and the body, and the first space is located outside the housing cavity.
The blood pump of claim 1, wherein the impeller comprises:

a seat, located outside the accommodating cavity, forming the outlet with the first end of the housing;

The auxiliary structures include:

The guide channel is arranged on the seat, communicates with the accommodating chamber and the first space respectively, and is used for conducting the blood in the accommodating chamber and the blood in the first space.
The blood pump according to claim 2, wherein the cross-sectional shape of the guide channel is circular or strip-shaped; and/or,

The auxiliary structure includes at least two flow guide channels, and the at least two flow guide channels are arranged in a ring shape or in a radial shape.
The blood pump according to claim 2, wherein the guide channel is arranged obliquely, a first axis is formed between the first port of the guide channel and the outlet, and the first axis is connected to the guide channel. The axis of the channel satisfies the parallel condition, wherein the first port of the guide channel is a port of the guide channel on the side of the accommodation chamber.
The blood pump according to claim 2, wherein the flow guide channel communicates with the outer surface of the seat and the inner surface of the seat, the outer surface of the seat refers to the surface facing the body, The inner surface of the seat refers to the surface facing the accommodating cavity.
The blood pump according to any one of claims 2 to 5, wherein the flow guide channel is close to the connection between the seat and the drive shaft; the aperture of the flow guide channel is smaller than a second set value.
The blood pump according to any one of claims 1 to 6, wherein the auxiliary structure comprises:

The stirring mechanism is rotatably arranged in the first space, and is used to promote blood flow in the first space.
The blood pump according to claim 7, wherein the agitation mechanism comprises a raised structure provided on the impeller and/or the drive shaft; and/or

The agitating mechanism includes a concave structure disposed on the impeller and/or the drive shaft.
The blood pump of claim 7, wherein the agitation mechanism comprises:

The auxiliary impeller is rotatably arranged in the first space.
The blood pump according to claim 7, wherein a first gap is formed between the stirring mechanism and the outer surface of the impeller; the outer surface of the impeller refers to the surface facing the main body.
The blood pump of claim 7, wherein the agitation mechanism comprises:

At least two protrusions are arranged on the outer surface of the impeller in the shape of a spiral plate, and are used to make the blood in the first space have an axial flow velocity.
The blood pump according to claim 11, wherein the root of the protrusion is in contact with or connected to the drive shaft, and the end of the protrusion is flush with the edge of the impeller.
The blood pump according to any one of claims 1 to 12, wherein the impeller comprises:

a seat, located outside the accommodating cavity, forming the outlet with the first end of the housing;

The auxiliary structures include:

The first guide part is arranged on the outer surface of the seat part, and the cross-sectional area decreases as it moves away from the outlet side, and is used to make the blood in the first space move along the surface of the first guide part to the flow at the outlet.
The blood pump according to claim 13, wherein the width between the seat and the body gradually increases from the middle of the seat to the edge of the impeller.
The blood pump according to claim 13, wherein the first guide part is in the shape of a cone.
The blood pump according to any one of claims 1 to 13, wherein the auxiliary structure comprises:

The second guide part is arranged at the first end of the body, and the cross-sectional area increases as it moves away from the outlet side, and is used to make the blood in the first space pass through the surface of the second guide part along the surface of the second guide part. The surface flow of the body.
The blood pump according to any one of claims 1 to 6, wherein the impeller makes the blood in the accommodating chamber flow from the first end of the blood pump to the second end of the blood pump; the auxiliary structure makes Blood in the first space flows from the second end of the blood pump to the first end of the blood pump.