A back vane structure capable of preventing backflow and an artificial heart

Abstract

The application discloses a back guide vane structure capable of preventing backflow and an artificial heart, and relates to the technical field of artificial hearts. The back guide vane structure comprises a back guide vane hub, a plurality of back guide vane blades fixedly connected to the back guide vane hub, and a deflection blade arranged at the rear end of the back guide vane blade and rotatably connected to the back guide vane hub and capable of deflecting to one side surface of the back guide vane blade. The application further discloses an artificial heart. The application has the advantages of preventing blood backflow when the artificial heart stops rotating due to a fault.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a back guide vane structure capable of preventing backflow 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 the extremely failed heart. 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 the pressure on the heart.

[0003] When the artificial heart stops working due to failure or other special circumstances, the blood in the pipeline has no driving force of the axial flow blood pump, and backflow of blood may occur, endangering the life safety of the patient. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide a back guide vane structure capable of preventing backflow and an artificial heart, which can prevent backflow of blood when the artificial heart stops rotating due to failure.

[0005] To solve the above technical problems, one aspect of the present application provides a back guide vane structure, comprising: a back guide vane hub;

[0006] A plurality of back guide vanes are fixedly connected to the back guide vane hub;

[0007] A deflection vane is arranged at the rear end of the back guide vane, is rotatably connected to the back guide vane hub, and can be deflected to one side surface of the back guide vane.

[0008] In a feasible implementation, the deflection vane is connected to the back guide vane through a rotating shaft, or the deflection vane is connected to the back guide vane hub through a rotating shaft.

[0009] In a feasible implementation, the deflection vane and the back guide vane are in abutment through an inclined abutment surface.

[0010] In a feasible implementation, a notch is arranged in the middle of the abutment surface of the deflection vane, and a protrusion adapted to the notch is arranged in the middle of the abutment surface of the back guide vane.

[0011] Correspondingly, the rotating shaft passes through the protrusion and is connected to the deflection vane on both sides of the notch.

[0012] In an implementable manner, a limiting structure is arranged on the rear guide vane or the rear guide vane hub, which can prevent the deflection vane from deflecting to the other side surface of the rear guide vane.

[0013] In an implementable manner, the limiting structure on the rear guide vane is a limiting block.

[0014] In an implementable manner, the limiting structure on the rear guide vane hub is a limiting block or a stepped surface.

[0015] In an implementable manner, the rear guide vanes are arranged in a spiral manner on the rear guide vane hub, or are arranged in an inclined manner on the rear guide vane hub.

[0016] In an implementable manner, the rear guide vanes are arranged in a spiral manner on the rear guide vane hub, or are arranged in an inclined manner on the rear guide vane hub.

[0017] In an implementable manner, the length of the deflection vane is greater than or equal to the distance between the two adjacent rear guide vanes, but less than 1.5 times the distance.

[0018] Correspondingly, the application also provides an artificial heart, which comprises the rear guide vane structure of the first aspect, and the rear guide vanes of the rear guide vane structure are fixedly arranged in the rear guide pipe.

[0019] The application has the following beneficial effects:

[0020] The application provides a rear guide vane structure and an artificial heart capable of preventing backflow, two rear guide vanes form a blood flow channel for blood flow, and when the artificial heart stops rotating due to failure, the deflection vane can deflect to the side surface of the rear guide vane to prevent backflow of blood.

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

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

[0023] Figure 1 is a schematic view of the rear guide vane structure in the embodiment of the application;

[0024] Figure 2 is a schematic view of the deflection of the rear guide vane structure in the embodiment of the application.

[0025] Reference numerals in the drawings:

[0026] 1 - rear guide vane hub;

[0027] 2 - rear guide vane;

[0028] 3 - deflector vane;

[0029] 4 - notch;

[0030] 5 - tab;

[0031] 6 - shaft. DETAILED DESCRIPTION

[0032] In order to make the above objectives, features and advantages of the present application more comprehensible, specific embodiments accompanying drawings will be described in detail below. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways different from those described herein without departing from the scope of the present application, and those skilled in the art can make similar improvements without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0033] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only.

[0034] 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] As Figure 1As shown in the drawings, the embodiment provides a back guide vane structure for an artificial heart and located at the rear end of the rotor, which comprises a back guide vane hub 1; a plurality of back guide vanes 2 are fixedly connected to the back guide vane hub 1, and each adjacent two back guide vanes 2 form a channel for blood flow; a deflection vane 3 is arranged at the rear end of the back guide vanes 2, wherein the rear end refers to that blood flows in from one end of the back guide vanes 2 and flows out from the other end, the end where the blood flows in is the front end, and the end where the blood flows out is the rear end. The deflection vane 3 is rotatably connected to the back guide vane hub 1 and can be deflected to one side surface of the back guide vanes 2, thereby having two working states of forward guide and reverse cut-off. The deflection of the one side surface refers to that the deflection direction of the deflection vane 3 is opposite to the spiral setting direction of the back guide vanes 2, that is, when the artificial heart stops working, the deflection vane 3 can be deflected to one side under the action of the reverse flow force, thereby blocking the channels and automatically cutting off in the reverse direction to prevent the reverse flow of blood; and in the working state of forward guide of the artificial heart, the deflection vane 3 is located in the guide working state under the action of the forward flow of blood, and cooperates with the back guide vanes 2 to guide the flow.

[0036] In a preferred scheme, as shown in Figure 1 and Figure 2 , the deflection vane 3 is connected to the back guide vanes 2 through a rotating shaft 6, and the rotating shaft 6 penetrates through the through hole to rotatably connect the deflection vane 3 and the back guide vanes 2. Specifically, the deflection vane 3 and the side surface of the adjacent end of the back guide vanes 2 are provided with through holes, and the rotating shaft 6 penetrates through the through holes to rotatably connect the deflection vane 3 and the back guide vanes 2 together. In this embodiment, the deflection vane 3 is connected to the back guide vanes 2 through the rotating shaft, and since the back guide vanes 2 are fixedly connected to the back guide vane hub 1, the deflection vane 3 is indirectly connected to the back guide vane hub 1. The connection mode of the deflection vane 3 adopted in this embodiment directly connects the deflection vane 3 and the back guide vanes 2, so that the deflection vane 3 and the back guide vanes 2 have continuity, thereby making the guide effect of the deflection vane 3 in the forward guide working state better.

[0037] In another preferred scheme, the deflection vane 3 is connected to the back guide vane hub 1 through the rotating shaft 6, and the rotating shaft 6 is fixedly arranged on the back guide vane hub 1. In this embodiment, the deflection vane 3 is directly connected to the back guide vane hub 1 through the rotating shaft 6, and is not directly connected to the back guide vanes 2, and the deflection vane 3 and the back guide vanes 2 can be directly connected or have a certain gap or distance.

[0038] In a possible implementation scheme, the deflection vane 3 and the back guide vanes 2 are abutted through an inclined abutment surface. Specifically, as shown in Figure 1As shown, the rear guide vane 2 has a first inclined surface at one end near the deflection vane 3, and the deflection vane 3 has a second inclined surface at one end near the rear guide vane 2. The first and second inclined surfaces abut together. When the deflection vane 3 wants to deflect to the other side of the surface, i.e. the direction of the blood outflow end, the first inclined surface will play a limiting role, restricting the deflection of the deflection vane 3 on the first inclined surface.

[0039] In one possible implementation, a notch 4 is provided in the middle of the contact surface of the deflector blade 3. This notch is positioned in the middle to ensure more even force distribution and more flexible rotation of the deflector blade 3. A protrusion 5, adapted to the notch 4, is provided in the middle of the contact surface of the rear guide blade 2. Correspondingly, the rotating shaft 6 passes through the protrusion 5 and connects to the deflector blades 3 on both sides of the notch 4. When the deflector blade 3 rotates, the rotating shaft 6 also rotates around the protrusion 5. Alternatively, if two notches 4 are provided on the deflector blade 3, preferably, the two notches 4 are respectively located at both ends of the second inclined surface of the deflector blade 3.

[0040] In one possible implementation, a limiting structure is provided on the rear guide vane 2 or the rear guide vane hub 1. The limiting structure can prevent the deflecting vane 3 from deflecting to the other side surface of the rear guide vane 2. The deflection to the other side surface mentioned here means that the deflection direction of the deflecting vane 3 is the same as the spiral direction of the rear guide vane 2.

[0041] In a preferred embodiment, the limiting structure on the rear guide vane 2 is a limiting block. When the deflecting vane 3 is in the forward guiding working state, the deflecting vane 3 abuts against the limiting block, thereby preventing the deflecting vane 3 from deflecting to the other side surface of the guide vane 2.

[0042] In another preferred embodiment, the limiting structure on the rear guide vane hub 1 is a limiting block or a stepped surface. When the deflecting blade is in the forward flow guiding working state, the limiting block or stepped surface set on the rear guide vane hub 1 abuts against the deflecting blade 3, thereby preventing the deflecting blade 3 from deflecting to the other side surface of the guide vane 2.

[0043] In one possible implementation, the rear guide vane 2 is arranged in a spiral shape on the rear guide vane hub 1, such as... Figure 1 As shown, the rear guide vanes 2 are arranged in a spiral shape on the rear guide vane hub 1. When blood flows in, the tangential velocity of the blood changes with the spiral shape, thus ensuring continuous blood flow between the rear guide vanes 2. Of course, in another possible implementation, the rear guide vanes 2 can also be arranged at an angle on the rear guide vane hub 1. Similarly, the above effect can be achieved by using an angled arrangement, which will not be elaborated here.

[0044] Under one possible implementation scheme, such as Figure 1 and Figure 2As shown, the distance between the rear guide vanes 2 is equal, and is distributed on the rear guide hub 1, so that the blood flow in each blood flow pipeline is consistent, and the blood flow is more stable. The length of the deflection vane 3 is greater than or equal to the distance between the two adjacent rear guide vanes 2, but less than 1.5 times the distance. The length of the deflection vane 3 is greater than or equal to the distance between the two adjacent rear guide vanes 2, which can ensure that the deflection vane 3 can abut on the rear guide vane 2; the length of the deflection vane 3 is greater than or equal to the distance between the two adjacent rear guide vanes 2, but less than 1.5 times the distance, which can avoid that the deflection vane 3 is too long and touches other places, such as the inner wall of the rear guide pipe, limits the further deflection of the deflection vane 3, and then cannot abut on the rear guide vane 2, cannot close the channel, and finally cannot prevent the backflow of blood.

[0045] Through the rear guide vane 2 structure capable of preventing backflow provided in the above, the deflection vane 3 is designed at the rear end of the rear guide vane 2 in the conventional scheme, so as to overcome the problem that when the artificial heart stops working due to failure, insufficient power and other special conditions, blood backflow occurs. The rear guide vane structure provided in the embodiment deflects through the deflection vane 3, abuts on the adjacent rear guide vane 2, and limits the backflow of blood.

[0046] The embodiment also provides an artificial heart comprising the rear guide vane structure capable of preventing backflow provided in the above, wherein the rear guide vane 2 of the rear guide vane structure is fixedly installed in the rear guide pipe. The artificial heart has the advantages of preventing blood backflow when the artificial heart stops rotating due to failure. In addition, the artificial heart also comprises a battery, a controller and the like.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0048] The above-mentioned 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 belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A back vane structure capable of preventing backflow, characterized by, The application relates to a rear guide vane structure, comprising: a rear guide vane hub; a plurality of rear guide vanes fixedly connected to the rear guide vane hub; a deflection vane arranged at the rear end of the rear guide vanes, rotatably connected to the rear guide vane hub, the deflection vane being deflected to one side surface of the rear guide vanes under the action of blood backflow force, the deflection direction of the deflection vane being opposite to the spiral direction of the rear guide vanes; the deflection vane and the rear guide vanes are in abutment through inclined abutment surfaces, the middle part of the abutment surface of the deflection vane is provided with a notch, the middle part of the abutment surface of the rear guide vanes is provided with a protrusion matched with the notch, and a rotating shaft penetrates through the protrusion and is connected to the deflection vane on both sides of the notch.

2. The rear guide vane structure according to claim 1, wherein: the deflection vane is connected to the rear guide vanes through the rotating shaft, or the deflection vane is connected to the rear guide vane hub through the rotating shaft.

3. The rear guide vane structure according to claim 2, wherein: a limiting structure is arranged on the rear guide vanes or the rear guide vane hub, and the limiting structure can prevent the deflection vane from being deflected to the other side surface of the rear guide vanes.

4. The rear guide vane structure according to claim 3, wherein: the limiting structure on the rear guide vanes is a limiting block.

5. The rear guide vane structure according to claim 3, wherein: the limiting structure on the rear guide vane hub is a limiting block or a stepped surface.

6. The rear guide vane structure according to claim 1, wherein: the rear guide vanes are arranged on the rear guide vane hub in an inclined manner.

7. The rear guide vane structure according to claim 1, wherein: the rear guide vanes are equidistantly arranged on the rear guide vane hub.

8. The rear guide vane structure according to claim 7, wherein: the length of the deflection vane is greater than or equal to the distance between two adjacent rear guide vanes, but less than 1.5 times the distance.

9. An artificial heart, characterized by The application further relates to a rear guide vane structure comprising the rear guide vane structure according to any one of claims 1-8, and the rear guide vanes of the rear guide vane structure are fixedly arranged in a rear guide pipe.

Images