Blood flow diverting device

Abstract

The application relates to a blood flow guiding device, comprising a support member at least partially inserted into a blood vessel, the support member having a receiving cavity; a guide member arranged in the receiving cavity; and a pushing member comprising a core shaft arranged in the receiving cavity and movable relative to the support member, and a pushing component for pressing the guide member on the core shaft, the pushing component having an open cavity, at least part of the guide member being received in the open cavity, the core shaft being pushed so that the pushing component drives the guide member to move to a target position. Blood flow flows along the inner wall of the guide member to reduce the impact of the blood flow on the aneurysm wall. The overall structure is simple, low in cost, and the guide member has high release efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a blood flow guiding device. BACKGROUND

[0002] The delivery and release structure of the existing blood flow guiding device is generally composed of metal, the product structure is complex, the components are many, the skill and experience of the user are required, and the precise delivery and release of the guiding device in the blood vessel can be realized only through the feedback of the mechanism, the sound transmission and the like. In addition, since the delivery and release structure of the blood flow guiding device in the prior art is difficult to process, the stability is not high, the metal mechanism needs to be broken or deformed during release, and therefore there is a risk of difficult release or even release failure, which requires a higher skill level of the user and also brings risks to the patient. SUMMARY

[0003] The purpose of the present application is to provide a blood flow guiding device which is simple in structure, low in cost and high in release efficiency.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a blood flow guiding device comprising:

[0005] a support member inserted at least partially into a blood vessel, the support member having a receiving cavity;

[0006] a guiding member arranged in the receiving cavity;

[0007] a pushing member comprising a core shaft arranged in the receiving cavity and movable relative to the support member, and a pushing component for pressing the guiding member on the core shaft, the pushing component having an open cavity, at least part of the guiding member being received in the open cavity, the core shaft being pushed to move the pushing component and the guiding member to a target position.

[0008] Further, a first through hole is arranged on the pushing component, and the core shaft passes through the first through hole and is fixedly connected with the pushing component.

[0009] Further, a hydrophilic coating is arranged on the outside of the pushing component.

[0010] Further, the pushing member further comprises a limiting component for pressing the guiding member away from one end of the pushing component on the core shaft.

[0011] Further, the limiting component comprises a connecting portion and a limiting portion, the connecting portion is used to connect with the core shaft, and the limiting portion is sleeved on the outside of the guiding member.

[0012] Further, a second through hole is arranged on the connecting portion, and the core shaft passes through the second through hole and is fixedly connected with the limiting component.

[0013] Further, the limiting component is an umbrella-shaped film structure, and the material is soft polymer.

[0014] Further, the limiting component is provided with a hydrophilic coating on the outside.

[0015] Further, the mandrel is provided with at least one developing mark.

[0016] Further, the guide is a self-expanding metal braided stent, and the material is nickel-titanium alloy, cobalt-chromium alloy or platinum-iridium alloy.

[0017] The present application has the advantages that the pushing component is arranged to press the guide on the mandrel, and the pushing component has an open cavity so that part of the guide can be accommodated in the open cavity. Under the action of external force, the mandrel drives the pushing component and the guide pressed in the open cavity of the pushing component to move until the guide reaches the target position, and the blood flow flows along the inner wall of the guide to reduce the impact of the blood flow on the aneurysm wall. The overall structure is simple, low in cost, and high in release efficiency of the guide.

[0018] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application clearer and to be implemented according to the content of the description, the following will be described in detail with the preferred embodiments of the present application and in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a cross-sectional view of the blood flow guiding device shown in the present application;

[0020] Figure 2 is Figure 1 is a partial structure schematic view of the blood flow guiding device shown in the present application;

[0021] Figure 3 is Figure 1 is another partial structure schematic view of the blood flow guiding device shown in the present application. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application will be further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0023] Please refer to Figure 1The blood flow guiding device 100 shown in the preferred embodiment of the present application comprises a support 1 with a containing cavity 11, a guide 2 arranged in the containing cavity 11, and a pushing member 3 arranged in the containing cavity 11 and connected with the guide 2. When in use, the user inserts at least part of the support 1 into the blood vessel, and moves the pushing member 3 towards the target position, so that the pushing member 3 drives the guide 2 to move towards the target position until the guide 2 is released at the target position, and the guide 2 adheres to the aneurysm, thereby achieving the treatment of the aneurysm.

[0024] Specifically, the support 1 is made of a composite material of metal wire and polymer, and the inner wall of the support 1 is a smooth inner wall, or the inner wall of the support 1 is provided with a smooth layer, so as to facilitate the movement of the guide 2 in the containing cavity 11 of the support 1. It should be noted that the smooth layer can be a lubricant layer directly coated on the inner wall of the support 1, or a component separately arranged on the inner wall of the support 1 and having lubricating effect.

[0025] In this embodiment, the guide 2 is a self-expanding metal braided stent, and the material thereof is nickel-titanium alloy or cobalt-chromium alloy or platinum-iridium alloy. The stent is formed of a ring-shaped dense mesh structure of a plurality of braided wires, and the braided wires of the dense mesh structure have a small intersection pitch, so that the guide 2 not only has good supportability for the blood vessel, but also has good blood flow guiding performance. When the guide 2 reaches the target position in the blood vessel, the guide 2 is separated from the pushing member 3, and the guide 2 covers the aneurysm, so as to change the direction of blood flow, reduce the impact of blood flow on the wall of the aneurysm, and finally make the aneurysm heal. It should be noted that the change of the direction of blood flow means that the blood flow originally flowing through the wall of the aneurysm in the blood vessel will flow along the inner wall of the guide 2. In this embodiment, the number of braided wires forming the dense mesh structure of the guide 2 can be 48 or 64 or 98 or 124 or 144, etc. The number of braided wires is not specifically limited herein and is determined according to the actual situation.

[0026] Please refer to Figure 1 and Figure 2 The pushing member 3 comprises a mandrel 31 arranged in the containing cavity 11 and a pushing component 32. The pushing component 32 is used to press and hold the guide 2 on the mandrel 31, and the pushing component 32 is provided with a first through hole 322, and the mandrel 31 is fixedly connected with the pushing component 32 through the first through hole 322. So that the mandrel 31 can move relative to the support 1 under the action of external force, and the mandrel 31 is pushed to drive the pushing component 32 and the guide 2 pressed and held by the pushing component 32 to move. It should be noted that the fixed connection between the pushing component 32 and the mandrel 31 is laser welding / heat air welding.

[0027] Specifically, the mandrel 31 is made of metal material, which has good pushing property and flexibility. The mandrel 31 is further provided with two mark points (not shown), and the distance between the two mark points is substantially equal to the longitudinal length of the guide piece 2, so that the user can determine the moving position of the guide piece 2 through the external image device. In the embodiment, the mark points are provided as developing rings made of platinum alloy or gold material, and the two developing rings are respectively sleeved on the outer side of the mandrel 31. In other embodiments, the mark points can also be made of other materials as long as the above-mentioned effect is achieved.

[0028] The pushing component 32 is made of high polymer material, which has an open cavity 321 opening towards the guide piece 2 and being provided in a tapered manner. Specifically, the thickness of the end of the pushing component 32 away from the guide piece 2 is larger, which is 0.3mm-1mm, and the thickness of the end of the pushing component 32 close to the guide piece 2 is smaller, which is 0.05mm-0.2mm, so that the guide piece 2 partially held in the open cavity 321 can be more smoothly released along the inner wall of the tapered open cavity 321.

[0029] The outer side of the pushing component 32 is provided in a cylindrical structure matched with the inner wall of the support piece 1, so that the pushing component 32 can be smoothly moved in the accommodating cavity 11 of the support piece 1 under the action of the mandrel 31. It is worth noting that the outer side of the pushing component 32 is provided with a hydrophilic coating to prevent thrombosis of the mandrel 31 during pushing the guide piece 2.

[0030] Please refer to Figure 1 and Figure 3 In order to more smoothly push the guide piece 2 to the target position, the pushing member 3 further includes a limiting part 332 for holding the end of the guide piece 2 away from the pushing component 32 on the mandrel 31. The limiting part 332 includes a connecting part 331 for connecting with the mandrel 31 and a limiting part 332 sleeved on the outer side of the guide piece 2 and abutting against the guide piece 2. Specifically, the connecting part 331 is provided with a second through hole 333, and the mandrel 31 passes through the second through hole 333 and is fixedly connected with the connecting part 331, and the fixed connection manner can be laser welding / heat air welding.

[0031] The limiting part 332 is an umbrella-shaped film structure with a thickness less than 0.1 mm and made of soft polymer material. The umbrella-shaped limiting part 332 is arranged to wrap the guiding part 2 away from one end of the pushing part 32, so that the two ends of the guiding part 2 are loaded into the accommodating cavity 11 of the support 1 after being pressed by the pushing part 32 with a conical open cavity 321 and the releasing part in the shape of an umbrella on the mandrel 31. It should be noted that the distance between the pushing part 32 and the limiting part 332 is matched with the length of the guiding part 2, so that the pushing part 32 and the limiting part 332 can easily press the guiding part 2. In this embodiment, the limiting part 332 is externally provided with a hydrophilic coating to prevent thrombosis of the mandrel 31 during the pushing of the guiding part 2.

[0032] In summary, the use process of the blood flow guiding device 100 is as follows: the mandrel 31 is fixedly connected with the pushing part 32 and the limiting part 332 by penetrating the first through hole 322 of the pushing part 32 and the second through hole 333 of the limiting part 332, and the two ends of the guiding part 2 are pressed on the mandrel 31 by the conical open cavity 321 of the pushing part 32 and the limiting part 332 of the limiting part 332, and the mandrel 31 and the guiding part 2 are loaded into the accommodating cavity 11 of the support 1. At least part of the guiding part 2 is delivered to the aneurysm in the blood vessel and fixed, the mandrel 31 is pushed to move the mandrel 31, the pushing part 32, the guiding part 2 and the limiting part 332, when the limiting part 332 is pushed out of the accommodating cavity 11 of the support 1, since the limiting part 332 is an umbrella-shaped film structure of soft polymer material, the limiting part 332 of the limiting part 332 no longer provides wrapping force for the guiding part 2, and the limiting part 332 naturally opens. The end of the guiding part 2 pressed by the limiting part 332 is no longer restricted by the limiting part 332 and the support 1, and the part of the guiding part 2 exposed outside the accommodating cavity 11 begins to self-expand and contact the inner wall of the blood vessel, and is anchored in the blood vessel. Continue to withdraw the support 1, since most of the guiding part 2 has been released in the blood vessel, the anchoring force of the guiding part 2 is utilized, until the guiding part 2 is completely separated from the support 1, then the support 1 and the mandrel 31 are withdrawn at the same time, since the guiding part 2 is in contact with the blood vessel after self-expanding, the limiting part 332 moves from the space of the self-expanded guiding part 2 towards the pushing part 32, so as to complete the release of the entire guiding part 2. Compared with the prior art, the blood flow guiding device 100 has the advantages of simple structure, convenient operation, high release efficiency, and no release difficulty / recovery difficulty or even release failure problem, when the guiding part 2 covers the aneurysm, it can effectively change the direction of blood flow, reduce the impact of blood flow on the aneurysm wall, and finally integrate into the inner wall of the blood vessel during endothelialization, so as to heal the aneurysm and improve the healing rate.

[0033] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0034] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A blood flow guiding device, characterized in that: include: a support member, at least partially inserted into the blood vessel, the support member having a receiving cavity; A guide member is disposed in the accommodating cavity; A pushing member, comprising a core shaft disposed in the accommodating cavity and movable relative to the support member, and a pushing member for pressing the guide member onto the core shaft, the pushing member having an open cavity, the open cavity being tapered, at least a portion of the guide member being received within the open cavity, the thickness of the pushing member gradually decreasing axially from an end away from the guide member to an end close to the guide member, transitioning from 0.3 mm to 1 mm to 0.05 mm to 0.2 mm, pushing the core shaft so that the pushing member drives the guide member to move to a target position; The pushing member further comprises a limiting component, which is used to press the end of the guide member away from the pushing member onto the core shaft. The limiting component is an umbrella-shaped film structure, and its material is a soft polymer material.

2. The blood flow guiding device according to claim 1, wherein The pushing component is provided with a first through hole, and the core shaft passes through the first through hole and is fixedly connected to the pushing component.

3. The blood flow guiding device according to claim 1, wherein The outside of the pushing component is provided with a hydrophilic coating.

4. The blood flow guiding device according to claim 1, wherein: The limiting component includes a connecting portion and a limiting portion, the connecting portion is used to be connected to the core shaft, and the limiting portion is sleeved on the outer side of the guide member.

5. The blood flow guiding device according to claim 4, wherein: The connecting portion is provided with a second through hole, and the core shaft passes through the second through hole and is fixedly connected to the limiting component.

6. The blood flow guiding device according to claim 1, wherein: The exterior of the limiting component is provided with a hydrophilic coating.

7. The blood flow guiding device according to claim 1, wherein: At least one developing mark is provided on the core shaft.

8. The blood flow guiding device according to claim 1, wherein: The guide member is a self-expanding metal braided stent, and the material of the stent is nickel-titanium alloy, cobalt-chromium alloy, or platinum-iridium alloy.

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