Intravascular stent for pin hole connection of bent blood vessels

Abstract

The invention discloses a pin-hole-connected intravascular stent for bent blood vessels, and belongs to the technical field of medical instruments, the pin-hole-connected intravascular stent comprises an intravascular stent body, the intravascular stent body comprises a plurality of supporting rings, the adjacent supporting rings are connected together through a bending angle assembly, and the bending angle assembly comprises a connecting rod and a middle rod; the connecting rod is connected with the middle rod through a pin, the intravascular stent body is located in a blood vessel, and the outer surface of the intravascular stent body is attached to the inner wall of the blood vessel. The connecting rods and the middle rods are connected through the pins, the middle rods are connected through the pins, so that the connecting rods and the middle rods can rotate freely, the middle rods can also rotate freely, and when the intravascular stent body is located in a bent blood vessel, the bending angle of the intravascular stent body can be flexibly adjusted; the intravascular stent body is matched according to the bending angle of the blood vessel.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a vascular stent with pinhole connection for curved blood vessels. Background Technology

[0002] Vascular diseases pose a serious threat to human health, and vascular stents are widely used in clinical practice as an important treatment method. However, traditional vascular stents have many shortcomings when dealing with tortuous blood vessels. The human body has numerous tortuous blood vessels, such as the circumflex branches of the coronary arteries and the vessels in the Circle of Willis region of the brain. Ordinary welded or one-piece stent structures have poor flexibility, making it difficult to fit tightly against the vessel wall when implanted in tortuous vessels. This can easily cause localized stress concentration in the vessel wall, leading to damage to the vascular intima and increasing the risk of thrombosis. Furthermore, a poorly fitted stent may also affect the normal flow of blood, further aggravating vascular lesions. The gap between the stent and the vessel wall can disrupt blood flow, creating turbulence, increasing resistance, stimulating the proliferation of vascular smooth muscle cells, and causing restenosis.

[0003] Therefore, those skilled in the art urgently need to provide a vascular stent with pinhole connection for curved blood vessels, so that the vascular stent can provide support for curved blood vessels while also having good flexibility. Summary of the Invention

[0004] The purpose of this invention is to provide a vascular stent with pin-hole connection for curved blood vessels, which ensures that the vascular stent provides support for curved blood vessels while also having good flexibility.

[0005] To achieve the above objectives, the present invention provides a vascular stent with pin-hole connection for curved blood vessels, comprising a vascular stent body, the vascular stent body including a plurality of support rings, adjacent support rings being connected together by a bending angle assembly, the bending angle assembly including a connecting rod and an intermediate rod, one end of the connecting rod being disposed on the support ring, the other end of the connecting rod being connected to the intermediate rod by a pin, the vascular stent body being located inside the blood vessel, and the outer surface of the vascular stent body being in contact with the inner wall of the blood vessel.

[0006] Preferably, the support ring is a structure consisting of multiple V-shaped bodies connected together.

[0007] Preferably, connecting rods are uniformly arranged on the end wall of the support ring at the crest or trough, and the extension direction of the connecting rods is consistent with the extension direction of the blood vessel.

[0008] Preferably, the crest of the support ring corresponds to the crest of the adjacent support ring, and the trough of the support ring corresponds to the trough of the adjacent support ring.

[0009] Preferably, the end of the connecting rod and the two ends of the intermediate rod are respectively provided with through holes, and the connecting rods and intermediate rods on two adjacent support rings are connected by a cylindrical pin through the through hole, and the two adjacent intermediate rods are also connected by a cylindrical pin through the through hole.

[0010] Preferably, the connecting rod and the intermediate rod are of equal length.

[0011] Preferably, the corners of the connecting rod and the intermediate rod that fit against the inner wall of the blood vessel are rounded.

[0012] Preferably, the connecting rods on two adjacent support rings are connected to the two intermediate rods by pins.

[0013] Preferably, the support ring is provided with six V-shaped bodies, and three bending angle components are evenly provided on the walls of the crests or troughs of the support ring.

[0014] The advantages and positive effects of the pin-hole connection vascular stent for curved blood vessels described in this invention are as follows:

[0015] 1. The present invention uses a pin connection design between the connecting rod and the intermediate rod, which allows the vascular stent to freely adjust the bending angle within the curved blood vessel. This structural design gives the vascular stent extremely high flexibility, enabling it to closely conform to the natural curved shape of the blood vessel.

[0016] 2. The connecting rod and intermediate rod of the present invention have rounded corners at the edges that fit against the inner wall of the blood vessel. This design not only reduces the damage of the vascular stent to the blood vessel wall, but also improves the fit between the stent and the blood vessel wall, further enhancing the safety of the vascular stent body.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a vascular stent with pin hole connection for curved blood vessels according to the present invention.

[0019] Figure 2 This is a schematic diagram showing the connection between the connecting rod and the intermediate rod of the present invention;

[0020] Figure 3 This is a schematic diagram of the unfolded vascular stent of the present invention;

[0021] Figure 4 This is a schematic diagram showing the connection between the vascular stent and the blood vessel of the present invention;

[0022] Figure 5 for Figure 4 Sectional view along axis AA;

[0023] Figure 6 This is a schematic diagram of the cylindrical pin structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the intermediate rod structure of the present invention.

[0025] Figure Labels

[0026] 1. Connecting rod; 2. Support ring; 3. Intermediate rod; 4. Cylindrical pin; 5. Through hole; 6. Blood vessel; 7. Rounded corner. Detailed Implementation

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In this application, 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 pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] like Figures 1-7 As shown, a vascular stent with pin-hole connection for curved blood vessels includes a vascular stent body, which includes a plurality of support rings 2. Adjacent support rings 2 are connected together by a bending angle assembly. The bending angle assembly includes a connecting rod 1 and an intermediate rod 3. One end of the connecting rod 1 is disposed on the support ring 2, and the other end of the connecting rod 1 is connected to the intermediate rod 3 by a pin. The vascular stent body is located inside the blood vessel 6, and the outer surface of the vascular stent body is in contact with the inner wall of the blood vessel 6.

[0031] Specifically, the connecting rod 1 and the intermediate rod 3 are connected by a pin, and the intermediate rods 3 are connected by a pin, so that the connecting rod 1 and the intermediate rod 3 can rotate freely, and the intermediate rods 3 can also rotate freely. When the vascular stent body is located in a curved blood vessel, the vascular stent body can flexibly adjust the bending angle so that the vascular stent body can cooperate with the bending angle of the blood vessel 6.

[0032] The support ring 2 is a structure consisting of multiple V-shaped bodies connected together.

[0033] Connecting rods 1 are evenly arranged on the end wall of the support ring 2 at the crests or troughs, and the extending direction of the connecting rods 1 is consistent with the extending direction of the blood vessel 6. Specifically, the extending direction of the intermediate rod 3 is consistent with the extending direction of the connecting rod 1.

[0034] like Figure 3 As shown, the peak of support ring 2 corresponds to the peak of the adjacent support ring 2, and the trough of support ring 2 corresponds to the trough of the adjacent support ring 2.

[0035] The end of the connecting rod 1 and the two ends of the intermediate rod 3 are respectively provided with through holes 5. The connecting rod 1 and the intermediate rod 3 on the two adjacent support rings 2 are connected by a cylindrical pin 4 through the through hole 5. The two adjacent intermediate rods 3 are also connected by a cylindrical pin 4 through the through hole 5.

[0036] The lengths of connecting rod 1 and intermediate rod 3 are equal.

[0037] The corners of the connecting rod 1 and the intermediate rod 3 that fit against the inner wall of the blood vessel 6 are provided with rounded corners 7, which can prevent the connecting rod 1 and the intermediate rod 3 from damaging the blood vessel when they rotate, and also fit the blood vessel wall better.

[0038] The connecting rods 1 on the two adjacent support rings 2 are connected to the two intermediate rods 3 by pins.

[0039] The support ring 2 is provided with six V-shaped bodies, and three bending angle components are evenly provided on the walls of the crests or troughs of the support ring 2.

[0040] Specifically, the number of intermediate rods 3 can be appropriately increased or decreased depending on the degree of curvature of the blood vessel 6, making it more suitable for the actual blood vessel 6. Alternatively, the number of intermediate rods 3 can be controlled according to the actual condition of the blood vessel 6, so that the vascular stent has both good support and flexibility.

[0041] Specifically, to further improve the adaptability of vascular stents to curved blood vessels and the support of vascular stents, the number and length of connecting rod 1 and intermediate rod 3 can be quantitatively optimized through finite element analysis (FEA) to select a vascular stent body that ensures both support and flexibility.

[0042] The process of using this invention is as follows:

[0043] Multiple support rings 2 are connected according to the length of blood vessel 6. The number of intermediate rods 3 is determined according to the requirements. The connecting rods 1 on the support rings 2 are connected to the intermediate rods 3 by passing through the cylindrical pins through the holes. The intermediate rods 3 are also connected to each other by passing through the cylindrical pins through the holes.

[0044] The connecting rod 1 and the intermediate rod 3 can rotate freely through the pin connection, and the intermediate rods 3 can also rotate freely. When the vascular stent body is located in the curved blood vessel, the vascular stent body can flexibly adjust the bending angle so that the vascular stent body can cooperate with the bending angle of the blood vessel 6, thereby improving the support and flexibility of the vascular stent for the curved blood vessel.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A vascular stent with pin-hole connection for curved blood vessels, characterized in that: The stent body includes a plurality of support rings, adjacent support rings are connected together by a bending angle assembly, the bending angle assembly includes a connecting rod and an intermediate rod, one end of the connecting rod is disposed on the support ring, and the other end of the connecting rod is connected to the intermediate rod by a pin, the stent body is located inside the blood vessel, and the outer surface of the stent body is in contact with the inner wall of the blood vessel.

2. The vascular stent with pin-hole connection for curved blood vessels according to claim 1, characterized in that: The support ring is a structure consisting of multiple V-shaped bodies connected together.

3. A vascular stent with pin-hole connection for curved blood vessels according to claim 2, characterized in that: Connecting rods are uniformly arranged on the end wall of the support ring at the crest or trough, and the extension direction of the connecting rods is consistent with the extension direction of the blood vessel.

4. A vascular stent with pin-hole connection for curved blood vessels according to claim 3, characterized in that: The crest of the support ring corresponds to the crest of the adjacent support ring, and the trough of the support ring corresponds to the trough of the adjacent support ring.

5. A vascular stent with pin-hole connection for curved blood vessels according to claim 4, characterized in that: The end of the connecting rod and the two ends of the intermediate rod are respectively provided with through holes. The connecting rods and intermediate rods on two adjacent support rings are connected by a cylindrical pin through the through hole. The two adjacent intermediate rods are also connected by a cylindrical pin through the through hole.

6. A vascular stent with pin-hole connection for curved blood vessels according to claim 5, characterized in that: The connecting rod is the same length as the intermediate rod.

7. A vascular stent with pin-hole connection for curved blood vessels according to claim 5, characterized in that: The connecting rod and the intermediate rod have rounded corners at their edges that fit against the inner wall of the blood vessel.

8. A vascular stent with pin-hole connection for curved blood vessels according to claim 5, characterized in that: The connecting rods on the two adjacent support rings are connected to the two intermediate rods by pins.

9. A vascular stent with pin-hole connection for curved blood vessels according to claim 2, characterized in that: The support ring is provided with six V-shaped bodies, and three bending angle components are evenly provided on the walls of the crests or troughs of the support ring.

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