Adjustable back guide vane structure and artificial heart

Abstract

The application discloses a structure of adjustable back guide vane, which comprises a back guide vane hub, back guide vane blades and mobile blades. The back guide vane blades are fixedly connected to the outer surface of the back guide vane hub. The mobile blades are arranged between the back guide vane blades and are axially movably connected to the outer surface of the back guide vane hub and can move to the end of the back guide vane hub. The front end of the mobile blade and the front end of the back guide vane blade form an acute angle. The application further discloses an artificial heart. The application has the advantages of controlling blood flow.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an adjustable rear guide vane structure and an artificial heart. BACKGROUND

[0002] With the increase of average life expectancy of the population, the incidence of cardiovascular diseases is increasing year by year. The severe stage of various types of heart disease can lead to heart failure. Drug treatment is difficult to maintain good blood circulation while reducing the load on the heart for extremely failed hearts. The emergence of artificial heart pumps provides enough time for many patients waiting for suitable heart matching for heart disease, and also can be used as a medical device in the heart recovery process to relieve heart pressure.

[0003] In the prior art, the rear guide vane is fixed on the outer surface of the rear guide hub, and the blood flows through the channel formed between the rear guide vanes at a certain rate. The size of the blood flow cannot be adjusted according to the actual needs of the artificial heart pump, which has certain limitations. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide an adjustable rear guide vane structure and an artificial heart, which can control the blood flow.

[0005] To solve the above technical problems, the first aspect of the present application provides a rear guide vane structure, comprising:

[0006] a rear guide hub;

[0007] a plurality of rear guide vanes, fixedly connected to the outer surface of the rear guide hub;

[0008] a moving vane arranged between the rear guide vanes, axially movably connected to the outer surface of the rear guide hub, and capable of moving towards the end of the rear guide hub;

[0009] wherein the front end of the moving vane and the front end of the rear guide vane form an acute angle.

[0010] In a feasible implementation, the rear guide vanes are streamline or linear, and the rear guide vanes are arranged obliquely on the outer surface of the rear guide hub.

[0011] In a feasible implementation, the distance between the rear guide vanes is equal, and the rear guide vanes are evenly distributed on the outer surface of the rear guide hub.

[0012] In a feasible implementation, the moving vane is streamline or linear, the moving vane is axially arranged on the rear guide hub, and the moving vane and the rear guide vane are spaced apart.

[0013] In one possible implementation, the front end of the back guide vane is on the same axis as the moving vane, or the front end of the back guide vane is close to the axis of the moving vane.

[0014] In one possible implementation, a sliding groove is arranged on the back guide vane hub, and the moving vane is connected in the sliding groove and can slide along the sliding groove.

[0015] In one possible implementation, the back guide vane structure further comprises a driving device arranged in the back guide vane hub, the driving device is connected with the moving vane and can drive the moving vane to move along the sliding groove.

[0016] In one possible implementation, the driving device comprises a motor, and the motor is a voice coil motor.

[0017] In one possible implementation, the sliding groove is in a straight line shape parallel to the back guide vane hub, or in a spiral shape around the surface of the back guide vane hub.

[0018] Correspondingly, the second aspect of the present application also provides an artificial heart comprising the back guide vane structure of the first aspect, and the back guide vane of the back guide vane structure is fixedly installed in the back guide pipe.

[0019] The present application has the following beneficial effects:

[0020] The present application provides an adjustable back guide vane structure and an artificial heart, the back guide vane and the adjacent moving vane form a blood flow channel for blood flow; in addition, when it is necessary to control the blood flow, the moving vane moves along the sliding groove, the moving vane controls the opening between the moving vane and the back guide vane, and thus the blood flow is controlled.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the present application, and together with the specification, serve to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0023] Figure 1 is a schematic view of the back guide vane structure of the present application.

[0024] Reference numerals in the drawings:

[0025] 1-back guide vane structure;

[0026] 11-back guide vane hub, 111-sliding groove, 12-back guide vane, 13-moving vane. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] like Figure 1 As shown, this embodiment provides a rear guide vane structure 1 for use in an artificial heart and located at the rear end of the rotor, including a rear guide vane hub 11, rear guide vanes 12, and movable vanes 13; specifically, there are multiple rear guide vanes 12, which are fixedly connected to the outer surface of the rear guide vane hub 11; the movable vanes 13 are arranged between the rear guide vanes 12, are axially movable and connected to the outer surface of the rear guide vane hub 11, and can move towards the end of the rear guide vane hub 11, where the end refers to the front end and the rear end of the rear guide vane hub 11. Further, blood flows in from one end of the rear guide vane hub 11 and flows out from the other end, with the inflowing end being the front end and the outflowing end being the rear end.

[0031] The front end of the movable blade 13 and the front end of the rear guide blade 12 form an acute angle. The front end refers to the end from which blood flows in and out of the movable blade 13 and the rear guide blade 12. The axial movement of the movable blade 13 adjusts the opening size of the front end of the movable blade 13 and the front end of the rear guide blade 12, changes the channel shape between the movable blade 13 and the rear guide blade 12, and produces different resistance effects on the flowing blood, thereby controlling the blood flow.

[0032] In one possible implementation, as shown in Figure 1 the rear guide vanes 12 are streamlined, and the rear guide vanes 12 are arranged obliquely on the outer surface of the rear guide vane hub 11. When blood flows in, the streamlined rear guide vanes 12 constantly change the tangential velocity of the blood, thereby ensuring that the blood constantly flows on the surface of the rear guide vanes 12. Of course, in another possible implementation, the rear guide vanes 12 can also be straight, and the straight rear guide vanes 12 can also achieve the above-mentioned effect, which will not be described here.

[0033] In one preferred implementation, the distance between the rear guide vanes 12 is equal, and is uniformly distributed on the outer surface of the rear guide vane hub 11. In this way, the blood flow in the blood flow channel between the two adjacent rear guide vanes 12 is the same, and the blood flow is more stable.

[0034] In one possible implementation, as shown in Figure 1 the moving vanes 13 are streamlined, and the moving vanes 13 are arranged axially on the rear guide vane hub 11. When blood flows in, the streamlined moving vanes 13 constantly change the flow direction of the blood, thereby ensuring that the blood constantly flows on the surface of the moving vanes 13. Of course, in another possible implementation, the moving vanes 13 can also be straight, and the straight moving vanes 13 can also achieve the above-mentioned effect, which will not be described here.

[0035] In addition, the moving vanes 13 and the rear guide vanes 12 are arranged at intervals, so that each moving vane 13 corresponds to a rear guide vane 12, and the blood flows through the blood flow channel formed by the moving vanes 13 and the guide vanes 12.

[0036] In one possible implementation, the front end of the rear guide vane 12 is on the same axis as the moving vane 13, and when the moving vane 13 moves towards the front end of the rear guide vane 12, the front end of the moving vane 13 and the front end of the rear guide vane 12 are in contact and closed, thereby preventing the flow of blood. When the moving vane 13 moves towards the rear end of the rear guide vane 12, the opening size of the front end of the moving vane 13 and the front end of the rear guide vane 12 constantly changes, thereby changing the blood flow size. Similarly, the front end of the rear guide vane 12 close to the axis of the moving vane 13 can also achieve the above-mentioned effect, which will not be described here.

[0037] In one possible implementation, as shown in Figure 1As shown, the rear guide vane hub 11 is provided with a sliding groove 111, and the mobile vane 13 is connected in the sliding groove 111 and can slide along the sliding groove 111; specifically, when the blood flow needs to be low, the mobile vane 13 moves to the front end of the rear guide vane hub 11 along the sliding groove 111, reduces the opening of the mobile vane 13 and the rear guide vane 12, and reduces the flow area of the front end of the rear guide vane hub 11, so as to reduce the blood flow; when the blood flow needs to be high, the mobile vane 13 moves to the rear end of the rear guide vane hub 11 along the sliding groove 111, increases the opening of the mobile vane 13 and the rear guide vane 12, and increases the flow area of the front end of the rear guide vane hub 11, so as to increase the blood flow.

[0038] In addition, in a preferred scheme, the length of the sliding groove 111 is greater than the length of the mobile vane 13, ensuring that the moving path of the mobile vane 13 is longer, and the blood flow can be better controlled, and at the same time, the width of the sliding groove 111 is less than the thickness of the mobile vane 13, reducing the blood flow from the sliding groove 111 into the rear guide vane hub 11.

[0039] Further, the rear end of the rear guide vane 12 is close to the sliding groove 111, which can avoid the rear guide vane 12 from touching the sliding groove 111 and affecting the movement of the mobile vane 12, and on the other hand, when the mobile vane 13 moves to the rear end of the rear guide vane hub 11, the rear end of the mobile vane 13 can also form an acute angle with the rear end of the rear guide vane 12, so as to control the blood flow by adjusting the opening of the mobile vane 13 and the rear guide vane 12.

[0040] In a possible implementation scheme, the rear guide vane structure 1 further comprises a driving device, which is arranged in the rear guide vane hub 11 and connected with the mobile vane 13, and can drive the mobile vane 13 to move along the sliding groove 111; specifically, the driving device comprises a motor, which is a voice coil motor, and the above-mentioned connection can be that a sliding block is arranged on the voice coil motor, the sliding block is connected with the mobile vane 13 through the sliding groove 111, and when the voice coil motor is powered, the coil receives a force in the magnetic field and moves linearly, thereby driving the mobile vane 13 to move along the sliding groove 111. Of course, the connection mode includes but is not limited to the above-mentioned connection mode.

[0041] In addition, the motor is a voice coil motor mainly because the voice coil motor has the characteristics of simple structure, small size and fast response, and the movement form of the voice coil motor can be linear.

[0042] Correspondingly, in a possible implementation scheme, when the movement form of the voice coil motor is linear, the sliding groove 111 is in a linear shape parallel to the rear guide vane hub 11; in addition, when the sliding groove 111 is in a spiral shape around the surface of the rear guide vane hub 11, a transmission mechanism can be added between the voice coil motor and the mobile vane 13, so as to make the mobile vane 13 move axially and cooperate with the rear guide vane 12 to control the blood flow.

[0043] Through the adjustable back guide vane structure 1 provided by the above, the moving vane 13 is designed between the back guide vanes 12 in the traditional scheme, so that the blood flow can be controlled, that is, in the rated working condition, when low flow and high pressure difference are needed, the moving vane 13 moves to the front end of the back guide hub 11, reduces the flow area of the front end of the back guide hub 11, increases the pressure increasing effect of the front end of the back guide hub 11, so as to reduce the flow and increase the pressure difference; when high flow and low pressure difference are needed, the moving vane 13 moves to the rear end of the back guide hub, increases the flow area of the front end of the back guide hub 11, reduces the pressure increasing effect of the front end of the back guide hub 11, so as to increase the flow and reduce the pressure difference. The back guide vane structure 1 provided by the embodiment reduces or increases the flow area of the front end of the back guide hub 11 through the movement of the moving vane 13, and then controls the flow of blood.

[0044] The embodiment also provides an artificial heart, which comprises the adjustable back guide vane structure 1 provided by the above embodiments, wherein the moving vane 13 of the back guide vane structure 1 is fixedly installed in the back guide pipe. The artificial heart has the advantage of controlling the flow of blood. In addition, the artificial heart also comprises a battery, a controller and the like.

[0045] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0046] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An artificial heart, characterized by, The back guide vane structure comprises, a back guide vane hub; a plurality of back guide vanes fixedly connected to the outer surface of the back guide vane hub and inside the back guide pipe of the artificial heart; a moving vane arranged between the back guide vanes, axially movably connected to the outer surface of the back guide vane hub and capable of moving towards the end of the back guide vane hub; wherein the front end of the moving vane and the front end of the back guide vane form an acute angle; a sliding groove is provided on the back guide vane hub, the moving vane is connected in the sliding groove and slides along the sliding groove, and the rear end of the back guide vane is close to the sliding groove; the back guide vane structure further comprises a driving device arranged in the back guide vane hub, the driving device is connected with the moving vane and capable of driving the moving vane to move along the sliding groove.

2. The artificial heart according to claim 1, wherein, the back guide vanes are streamline or straight line, and the back guide vanes are arranged obliquely on the outer surface of the back guide vane hub.

3. The artificial heart according to claim 2, wherein, the distance between the back guide vanes is equal and uniformly distributed on the outer surface of the back guide vane hub.

4. The artificial heart according to claim 3, wherein, the moving vane is streamline or straight line, and the moving vane is arranged axially on the back guide vane hub, and the moving vane and the back guide vanes are arranged at intervals.

5. The artificial heart according to claim 4, wherein, the front end of the back guide vane is on the same axis as the moving vane, or the front end of the back guide vane is close to the axis of the moving vane.

6. The artificial heart according to claim 1, wherein, the driving device comprises a motor, and the motor is a voice coil motor.

7. The artificial heart according to claim 1, wherein, the sliding groove is linear parallel to the back guide vane hub, or is spiral around the surface of the back guide vane hub.

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