CN115474950A - Blood pump capable of preventing blood coagulation - Google Patents

Abstract

The embodiment of the application discloses can prevent blood pump of blood coagulation, blood pump includes: a housing having an accommodating chamber; an outlet disposed at one end of the housing; the impeller is rotatably arranged in the accommodating cavity; a drive device comprising a body and a drive shaft; the driving shaft is rotatably arranged on the body and connected with the impeller; the driving device is used for driving the impeller to rotate in the accommodating cavity through the driving shaft; an auxiliary structure arranged on the impeller and/or the driving device and used for enabling the blood in the first space to flow; the first space is a space formed between the impeller and the body; the drive shaft drives the impeller to rotate, the impeller is used for pushing blood to flow out of the outlet in a first direction, and the auxiliary structure is used for enabling the blood in the first space to flow in a second direction. The blood pump in the embodiment of the application can prevent blood coagulation in the first space and improve the safety of the blood pump in use.

Description

Anti-clotting blood pump

technical field

The present application relates to a blood pump capable of preventing blood coagulation.

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, which drive the impeller to rotate through the driving device to provide the set flow and pressure. In the prior art, there will be an obvious low-speed zone between the impeller and the driving device. When the blood pump runs for a long time When the blood coagulation occurs, this low-speed zone will produce a significant coagulation effect and change the blood flow state, hinder the normal operation of the blood pump, and reduce the flow of the blood pump; when the thrombus caused by coagulation is large, it will cause the blood pump to fail, and even cause Thromboembolism, stroke and other problems affect the life safety of patients.

Contents of the invention

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

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 capable of preventing blood coagulation, and the blood pump includes:

The housing has an accommodation cavity;

the outlet is arranged at one end of the housing;

the impeller is rotatably arranged in the accommodating cavity;

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 through the drive shaft in the Rotation in the chamber;

An auxiliary structure, arranged on the impeller and/or the driving device, is used to make the blood in the first space flow; the first space is the space formed between the impeller and the body;

When the drive shaft drives the impeller to rotate, the impeller is used to push the blood out of the outlet in a first direction, and the auxiliary structure is used to make the blood in the first space flow in a second direction.

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:

a guide channel, arranged on the seat, communicated with the accommodating cavity and the first space respectively;

When the drive shaft drives the impeller to rotate, the blood in the first space flows into the accommodation cavity from the flow guiding channel in the second direction, and the impeller is used to push the blood in the accommodation cavity Blood flows from the outlet in a first direction.

In some optional implementation manners, the cross-sectional shape of the guide channel is circular or strip-shaped;

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, and the inclination direction of the guide channel matches the third direction, wherein the third direction is that the blood flows from the outlet in the radial direction of the housing. The direction of outflow.

In some optional implementations, the auxiliary structure includes:

the auxiliary impeller is rotatably arranged in the first space;

When the drive shaft drives the impeller to rotate, the impeller is used to push the blood in the accommodating chamber to flow out from the outlet in a first direction, and the auxiliary impeller is used to push the blood in the first space Blood flows in the second direction.

In some optional implementation manners, the auxiliary impeller contacts or forms a first gap with the outer surface of the impeller; the outer surface of the impeller refers to the surface facing the main body.

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 first guide part is arranged on the outer surface of the seat part and is inclined toward the side close to the outlet;

When the drive shaft drives the impeller to rotate, the impeller is used to push the blood in the accommodating chamber to flow out from the outlet in a first direction, and the blood in the first space flows out in a second direction along the outlet. The first guiding part flows toward the outlet.

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

In some optional implementations, the auxiliary structure includes:

a second guide part, disposed at the first end of the body, inclined away from the outlet side;

When the drive shaft drives the impeller to rotate, the impeller is used to push the blood in the accommodating chamber to flow out from the outlet in a first direction, and the blood in the first space flows out in a second direction along the outlet. The second guide part flows.

In some optional implementations, the ontology also includes:

a columnar part connected to the second guide part;

When the drive shaft drives the impeller to rotate, the blood in the first space flows in the second direction along the surface of the second guide part and through the surface of the columnar part.

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 rotatably disposed in the housing chamber; a driving device including 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 in the accommodating cavity through the drive shaft; the auxiliary structure, The impeller and/or the driving device are arranged to make the blood in the first space flow; the first space is the space formed between the impeller and the body; the drive shaft drives the impeller to rotate In the case of , the impeller is used to push the blood to flow out from the outlet in the first direction, and the auxiliary structure is used to make the blood in the first space flow in the second direction; the blood in the first space is made to flow through the auxiliary structure Flowing in the second direction can prevent coagulation in the first space and improve the safety of the blood pump.

Description of drawings

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

FIG. 2 is an optional structural schematic diagram of a blood pump capable of preventing blood coagulation provided by an embodiment of the present application;

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

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

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

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

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

FIG. 8 is a schematic diagram of an optional partial structure of a blood pump capable of preventing blood coagulation provided by an embodiment of the present application;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

FIG. 23 is a schematic diagram of an optional partial structure of a blood pump capable of preventing blood coagulation provided by an 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 auxiliary impeller.

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 chamber; the outlet 101 is disposed at one end of the housing 110; the impeller 120 is rotatably disposed in the accommodating chamber; the drive device includes a body 132 and a drive shaft 131; the drive shaft 131 is rotatably disposed in the accommodating chamber; The body 132, the drive shaft 131 is connected to the impeller 120; the drive device is used to drive the impeller 120 to rotate in the cavity through the drive shaft 131; the auxiliary structure is arranged on the impeller 120 And/or driving device, the auxiliary structure is used to make the blood flow in the first space 103; The first space 103 is the space formed between the impeller 120 and the body 132; The drive shaft 131 drives the When the impeller 120 rotates, the impeller 120 is used to push the blood to flow out from the outlet 101 in the first direction, and the auxiliary structure is used to make the blood in the first space 103 flow in the second direction; The blood flowing in the second direction in the first space 103 can prevent coagulation in the first space 103 and improve the safety of the blood pump.

In the embodiment of the present application, as shown in FIG. 1 , if there is no auxiliary structure, when the drive shaft 131 drives the impeller 120 to rotate, the blood flow rate in the first space 103 is relatively low, and it is easy to flow at the drive shaft 131 . Clotting occurs.

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 promote blood flow.

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 second end of the connecting portion 121 is connected to the drive shaft. 131 connections.

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 cylindrical structure, so that the second end of the connecting portion 121 is sleeved on the outside of the driving shaft 131 and connected to the driving shaft 131 . 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 portion 121 to the second end of the connecting portion 121 in a first direction.

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.

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 chamber.

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 .

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 to flow out from the outlet 101 in the first direction, and the auxiliary structure is used to make the blood in the first space 103 flow in the second direction; The blood flowing in the second direction in the first space 103 can prevent coagulation in the first space 103 and improve the safety of the blood pump.

Here, the first direction is not limited. For example, the first direction may be a direction toward the outlet 101 .

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 connected; when the drive shaft 131 drives the impeller 120 to rotate, the blood in the first space 103 flows into the accommodation cavity from the flow guide channel 124 in the second direction, so The impeller 120 is used to push the blood in the accommodating chamber to flow out from the outlet 101 in the first direction, so that the blood in the first space 103 can flow in the second direction through the guide channel 124, which can prevent the blood in the first space from Blood coagulation occurs in 103, which improves the safety of blood pump use.

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 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 . In the case where the at least two air guiding channels 124 can also be arranged radially, the at least two air guiding channels 124 can include four bar-shaped air guiding channels 124, and the four bar-shaped air guiding channels 124 are radially arranged. arrangement, as shown in Figures 7 and 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, the inclination direction of the guide channel 124 can match the third direction, so that the blood in the first space 103 can enter into the accommodating chamber through the guide channel 124 more easily, and the blood is pushed through the impeller to move the second direction. One direction flows out from the outlet 101 . The inclination direction of the flow guide channel 124 matches the third direction, and may be that the inclination direction of the flow guide channel 124 is the same as the third direction, or the inclination direction of the flow guide channel 124 is the same as the third direction. Much the same. The third direction is the direction in which blood flows out from the outlet in the radial direction of the casing. 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 some optional implementation manners of the embodiment of the present application, as shown in FIG. 11 , the auxiliary structure may include: an auxiliary impeller 140 . The auxiliary impeller 140 is rotatably disposed in the first space 103; when the drive shaft 131 drives the impeller 120 to rotate, the impeller 120 is used to push the blood in the accommodating cavity from the first direction to the The outlet 101 flows out, and the auxiliary impeller 140 is used to push the blood in the first space 103 to flow in the second direction; thereby preventing coagulation in the first space 103 and improving the safety of the blood pump.

In this implementation manner, the structure of the auxiliary impeller 140 is not limited.

For example, the auxiliary impeller 140 may be an axial impeller, a backward centrifugal impeller, or a forward centrifugal impeller. When the auxiliary impeller 140 is an axial flow impeller, the shape of the auxiliary impeller 140 may be a forward curved type, a radial type, a single plate type, an airfoil type, and the like. When the auxiliary impeller 140 is a backward centrifugal impeller, the shape of the auxiliary impeller 140 may be a single plate type, an arc type, an airfoil type, and the like. When the auxiliary impeller 140 is a forward centrifugal impeller, the shape of the auxiliary impeller 140 may be a flat blade, an arc narrow blade, an arc blade, an airfoil blade or a flat curved backward blade.

As an example, the auxiliary impeller 140 may include auxiliary blades 122, through which the blood in the first space 103 may be pushed to flow in the second direction.

Here, the number of auxiliary blades 122 is not limited. For example, the number of auxiliary blades 122 may be one or multiple, as shown in FIG. 13 , FIG. 15 , FIG. 17 and FIG. 19 .

Here, the shape of the auxiliary blade 122 is not limited. For example, the auxiliary blade 122 may be a straight plate structure. For another example, as shown in FIG. 13 , FIG. 15 , FIG. 17 and FIG. 19 , the auxiliary blade 122 may be a bent plate structure.

In this implementation manner, the manner in which the auxiliary impeller 140 is rotatably disposed in the first space 103 is not limited. For example, the auxiliary impeller 140 can be fixed on the driving shaft 131 so that the auxiliary impeller 140 can be driven to rotate by the driving shaft 131 . For another example, the auxiliary impeller 140 may be fixed to the impeller 120 so as to drive the auxiliary impeller 140 to rotate through the impeller 120 .

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

For example, the auxiliary impeller 140 is in contact with the outer surface of the impeller 120. As shown in FIGS. space.

For another example, a first gap is formed between the auxiliary impeller 140 and the outer surface of the impeller 120, as shown in FIG. 16 and FIG. The blood inside will flow along the axial direction of the auxiliary impeller 140, so that the blood in the first space 103 can flow in the second direction, and can also flow in the axial direction of the auxiliary impeller 140, which can further prevent the blood in the first space 103 from Blood coagulation occurs in the blood pump, and the safety of blood pump use is improved.

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 .

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 first guide part 125 is inclined toward the side close to the outlet 101; when the drive shaft 131 drives the impeller 120 to rotate, the impeller 120 is used to push the blood in the accommodating cavity from The outlet 101 flows out, and the blood in the first space 103 flows toward the outlet 101 along the first guide part 125 in the second direction, so that the blood in the first space 103 can pass through the first guide part 125 The blood in the first space 103 flows in the second direction, and the blood in the first space 103 and the blood at the outlet 101 are brought together in one place and pushed to flow through the impeller 120; thus, coagulation in the first space 103 can be prevented, and the use of the blood pump can be improved. security.

In this implementation manner, the structure of the first guide portion 125 is not limited, as long as the first guide portion 125 is inclined toward the side close to the outlet 101 . 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 second guide part 1321 is inclined away from the outlet 101; when the drive shaft 131 drives the impeller 120 to rotate, the impeller 120 is used to push the blood in the accommodating cavity to flow from the outlet in a first direction. 101 flows out, the blood in the first space 103 flows along the second guide part 1321 in the second direction, so that the blood in the first space 103 flows in the second direction through the second guide part 1321, which can Blood coagulation in the first space 103 is prevented, and the safety of the blood pump is improved.

In this implementation manner, the structure of the second guide portion 1321 is not limited, as long as the second guide portion 1321 is inclined away from the outlet 101 . 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 in the second direction along the surface of the second guide portion 1321 and passes through the surface of the columnar portion 1322 , 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 guide channel 124 , the auxiliary impeller 140 , the first guide portion 125 and the second guide portion 1321 . As an example, as shown in FIGS. 22 and 23 , the auxiliary structure may include a guide channel 124 and an auxiliary impeller 140 . 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 having a housing chamber; an outlet 101 disposed on one side of the housing 110; an impeller 120 rotatably disposed in the housing chamber; a driving device comprising Body 132 and drive shaft 131; the drive shaft 131 is rotatably arranged on the body 132, the drive shaft 131 is connected to the impeller 120; the driving device is used to drive the impeller through the drive shaft 131 120 rotates in the accommodating chamber; 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 first space 103 is the impeller 120 and the The space formed between the main bodies 132; when the drive shaft 131 drives the impeller 120 to rotate, the impeller 120 is used to push blood to flow out from the outlet 101 in a first direction, and the auxiliary structure is used to make the second The blood in the first space 103 flows in the second direction; making the blood in the first space 103 flow in the second direction through the auxiliary structure can prevent coagulation in the first space 103 and improve the safety of the blood pump.

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 (10)

1. A blood pump capable of preventing blood coagulation, characterized in that the blood pump comprises: The housing has an accommodation cavity; the outlet is arranged at one end of the housing; the impeller is rotatably arranged in the accommodating cavity; 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 through the drive shaft in the Rotation in the chamber; An auxiliary structure, arranged on the impeller and/or the driving device, is used to make the blood in the first space flow; the first space is the space formed between the impeller and the body; When the drive shaft drives the impeller to rotate, the impeller is used to push the blood out of the outlet in a first direction, and the auxiliary structure is used to make the blood in the first space flow in a second direction. 2. The blood pump according to 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: a guide channel, arranged on the seat, communicated with the accommodating cavity and the first space respectively; When the driving shaft drives the impeller to rotate, the blood in the first space flows into the accommodation cavity from the flow guide channel in the second direction, and the impeller is used to push the blood in the accommodation cavity Blood flows from the outlet in a first direction. 3. The blood pump according to claim 2, characterized in that, the cross-sectional shape of the diversion channel is circular or strip-shaped; 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. 4. The blood pump according to claim 2, characterized in that, the guide channel is arranged obliquely, and the inclination direction of the guide channel matches a third direction, wherein the third direction is when the blood flows in the The radial direction of the housing flows out from the outlet. 5. The blood pump according to claim 1, wherein the auxiliary structure comprises: the auxiliary impeller is rotatably arranged in the first space; When the driving shaft drives the impeller to rotate, the impeller is used to push the blood in the accommodating chamber to flow out from the outlet in a first direction, and the auxiliary impeller is used to push the blood in the first space Blood flows in the second direction. 6. The blood pump according to claim 5, wherein the auxiliary impeller is in contact with the outer surface of the impeller or forms a first gap; the outer surface of the impeller refers to the surface facing the main body. 7. The blood pump according to 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 first guide part is arranged on the outer surface of the seat part and is inclined toward the side close to the outlet; When the drive shaft drives the impeller to rotate, the impeller is used to push the blood in the accommodating chamber to flow out from the outlet in a first direction, and the blood in the first space flows out in a second direction along the outlet. The first guiding part flows toward the outlet. 8 . The blood pump according to claim 7 , wherein the first guide portion is in the shape of a frustum of a cone. 9. The blood pump according to any one of claims 1 to 8, wherein the auxiliary structure comprises: a second guide part, disposed at the first end of the body, inclined away from the outlet side; When the drive shaft drives the impeller to rotate, the impeller is used to push the blood in the accommodating chamber to flow out from the outlet in a first direction, and the blood in the first space flows out in a second direction along the outlet. The second guide part flows. 10. The blood pump according to claim 9, wherein the body further comprises: a columnar part connected to the second guide part; When the drive shaft drives the impeller to rotate, the blood in the first space flows in the second direction along the surface of the second guide part and through the surface of the columnar part.

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