Plugging stent and plugging balloon catheter

Abstract

The utility model relates to the technical field of medical instruments, and provides a plugging support and a plugging balloon catheter, and the plugging support comprises a supporting part and an intercepting part; the supporting part can be contracted and unfolded for supporting, one end of the intercepting part is connected with the supporting part, the other end of the intercepting part is gradually contracted and extends to form a cone shape, the supporting part and the intercepting part are both provided with hollowed-out parts, and a woven mesh is arranged in the hollowed-out part of at least one of the supporting part and the intercepting part. According to the utility model, the woven mesh is arranged in the hollow part of at least one of the supporting part and the intercepting part, so that the gap of the occlusion stent is further reduced, and the woven mesh can better leave substances in blood vessels, so that the occlusion time is shortened, and the clinical requirements of acute vascular embolism occlusion are met.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an occlusion stent and an occlusion balloon catheter. Background Technology

[0002] During surgery, patients sometimes experience organ or tissue bleeding, or conditions such as intracranial arteriovenous cavernous fistula, tumors, or patent ductus arteriosus. These conditions require embolization therapy, which involves using a occlusion device to block the blood vessel and create a vascular embolism.

[0003] Existing occlusion devices often require a perforated structure of a certain size to facilitate intervention and repositioning of the blood vessel. However, in cases of acute vascular embolism, the perforated structure may result in poor occlusion effectiveness, failing to provide rapid vascular closure and thus not meeting acute clinical needs. Summary of the Invention

[0004] To address the problem that existing technologies cannot quickly occlude blood vessels, the purpose of this invention is to provide an occlusion stent and an occlusion balloon catheter for embolizing blood vessels.

[0005] To solve the above problems, this utility model provides the following technical solution:

[0006] This utility model provides a blocking bracket, including: a support part and an interception part; the support part can be contracted and expanded for support, one end of the interception part is connected to the support part, and the other end gradually narrows and extends into a cone shape, both the support part and the interception part are provided with hollows, and at least one of the support part and the interception part is provided with a woven mesh in the hollow.

[0007] Furthermore, the support portion, the interception portion, and the woven mesh are all biodegradable.

[0008] Furthermore, the woven mesh includes a first woven mesh disposed in the hollow of the intercepting section.

[0009] Furthermore, the woven mesh also includes a second woven mesh disposed in the hollow space of the support portion.

[0010] Furthermore, the occlusion stent also includes a fixing member; the fixing member is installed on the support portion and can swing outward when the support portion is opened, thus fixing it to the inner wall of the blood vessel.

[0011] Furthermore, the fastener is in the form of protruding spikes.

[0012] Furthermore, the fastener is installed within the hollow of the support portion.

[0013] Furthermore, the fastener is a biodegradable fastener.

[0014] Furthermore, the support portion is provided with a developing hole, which is used to place developing material.

[0015] This utility model also provides an occlusion balloon catheter, including a catheter, a balloon, and an occlusion stent;

[0016] The catheter is connected to the balloon, and the occlusion stent can be fitted onto the balloon; the occlusion stent is the occlusion stent described above.

[0017] The beneficial effects of this utility model are: at least one of the support part and the interception part is provided with a woven mesh in the hollow, thereby further reducing the gap of the occlusion stent. The woven mesh can better retain the substances in the blood vessels, thereby accelerating the occlusion time and meeting the clinical needs of acute vascular embolism occlusion. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present utility model;

[0019] Figure 2 This is the front view of the present utility model;

[0020] Figure 3 This is a bottom view of the present invention;

[0021] Figure 4 This is a front sectional view of the balloon of this utility model after the occlusion stent is expanded.

[0022] Figure label:

[0023] 100. Blocking bracket; 110. Support part; 120. Interception part; 130. Fixing component; 140. Imaging hole;

[0024] 121. First woven mesh; 122. Second woven mesh;

[0025] 200. Balloon; 210. Catheter. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] For ease of description of the first, second, and third directions in the embodiments of this application, the first direction is the left-right direction in the figures, the second direction is the front-back direction in the figures, and the third direction is the up-down direction in the figures. The x-axis arrow direction is referred to as the "right" direction, the y-axis arrow direction as the "up" direction, and the z-axis arrow direction as the "back" direction, but these are not the sole limitations in the actual application of this application.

[0029] like Figure 1-4 As shown, this embodiment provides an occlusion stent 100 for embolizing blood vessels, comprising a support portion 110 and an interception portion 120. The support portion 110 is capable of contraction and expansion for support, and the interception portion 120 is connected to the support portion 110 at one end, and gradually narrows and extends into a cone shape at the other end for intercepting substances in the blood vessel. Both the support portion 110 and the interception portion 120 are provided with perforations, and a woven mesh is provided in the perforation of at least one of the support portion 110 and the interception portion 120. Furthermore, the support portion 110, the interception portion 120, and the woven mesh are all biodegradable. By providing a woven mesh in the perforation of at least one of the support portion 110 and the interception portion 120, the gaps in the occlusion stent 100 are further reduced, and the woven mesh can better trap substances in the blood vessel, thereby accelerating the occlusion time and meeting the clinical needs of acute vascular embolism occlusion.

[0030] like Figure 1-3 As shown, in this embodiment, the support portion 110 has a hollow structure. The hollow design allows the support portion 110 to have space for contraction and expansion, facilitating its deformation during expansion.

[0031] The support portion 110 is made of biodegradable metal or polymer. This means that after the support portion 110 has provided support for a period of time, it can be ablated within the blood vessel without needing to be removed, thus avoiding unnecessary harm to the patient.

[0032] Biodegradable metals or polymers are available for use: materials such as magnesium alloys, polylactic acid (PLLA), polycaprolactone (PCL), and polydioxanone (PPDO).

[0033] like Figure 1-3 As shown, in this embodiment, the intercepting part 120 is cone-shaped and can contract and expand in accordance with the contraction and expansion of the supporting part 110.

[0034] The woven mesh is made of biodegradable fibrous yarn produced by electrospinning. In this embodiment, the woven mesh includes a first woven mesh 121 disposed in the hollowed-out portion 120. Furthermore, the woven mesh also includes a second woven mesh 122 disposed in the hollowed-out portion 110. By using the first woven mesh 121 and the second woven mesh 122, substances in the blood vessels can be effectively intercepted together, resulting in higher interception efficiency and accelerating thrombus formation.

[0035] The fibrous yarn is biodegradable and can dissolve in blood vessels after being trapped for a period of time, thus avoiding unnecessary harm to patients.

[0036] The fibrous yarn can be made of materials such as polylactic acid (PLLA), polyhydroxyacetic acid (PGA), and polydicyclohexanone (PPDO).

[0037] In addition, the occlusion stent 100 also includes a fixing member 130, which is installed on the support portion 110. The fixing member 130 can swing outward when the support portion 110 is opened, and after swinging outward, it can be fixed to the inner wall of the blood vessel. Specifically, when the support portion 110 is opened, the fixing member 130 swings outward, and the support portion 110 is fixed to the inner wall of the blood vessel by the fixing member 130. When the support portion 110 is opened, the fixing member 130 swings outward and sinks into the blood vessel to ensure the stability of the support portion 110. The interception portion 120 and the braided mesh intercept substances in the blood vessel to facilitate thrombus formation. Because the fixing member 130 only swings outward after the support portion 110 is opened, it will not contact the inner wall of the blood vessel until it reaches the designated position, thereby preventing damage to the blood vessel.

[0038] Furthermore, the fixing member 130 is installed within the hollow of the support portion 110. By placing the fixing member 130 in the hollow, when the support portion 110 is not opened, the fixing member 130 is located within the hollow, preventing the fixing member 130 from scratching the blood vessel by pointing outwards from the support portion 110 when it moves within the blood vessel. When the support portion 110 is opened, the fixing member 130 is pushed outwards and fixed to the inner wall of the blood vessel, ensuring that the support portion 110 is securely fixed within the blood vessel.

[0039] The fixation element 130 is shaped like a protruding bar, and the tip of the bar can be embedded into the inner wall of the blood vessel. The protruding bar shape can more effectively fix it to the blood vessel and prevent it from being unstable.

[0040] The length of the fixation piece 130 is between 0.5 and 1.5 mm, so that the fixation piece 130 can be inserted into the blood vessel, while preventing the fixation piece 130 from being too long and puncturing the blood vessel.

[0041] The fixation element 130 is made of biodegradable metal or polymer. After being fixed for a period of time, it dissolves into the blood vessel, avoiding unnecessary damage to the patient.

[0042] Biodegradable metals or polymers are available for use: materials such as magnesium alloys, polylactic acid (PLLA), polycaprolactone (PCL), and polydioxanone (PPDO).

[0043] In addition, the support portion 110 is provided with a radiopaque hole 140, which is used to place radiopaque material. That is to say, by placing radiopaque material on the support portion 110, it is convenient to detect the position of the support portion 110 during implantation. The radiopaque material can be platinum.

[0044] like Figure 1-4 As shown, this embodiment also provides an occlusion balloon catheter, including a catheter 210, a balloon 200, and an occlusion stent 100. The catheter 210 is connected to the balloon 200, and gas is inflated into the balloon 200 via the catheter 210. The occlusion stent 100 can be fitted onto the balloon 200 and expands as the balloon 200 expands. The occlusion stent 100 is the occlusion stent 100 described above. Specifically, the support portion 110 can be fitted onto the balloon 200, and the expansion of the balloon 200 expands the support portion 110. Initially, the support portion 110 can contract and fit onto the balloon 200. The balloon 200 enters the site requiring embolization through the blood vessel. By inflating the balloon 200, the balloon 200 expands the support portion 110. Finally, the balloon 200 is withdrawn and removed, leaving the occlusion stent 100 in the blood vessel.

[0045] In summary, this invention provides an occlusion stent and an occlusion balloon catheter. At least one of the support and interception sections has a woven mesh in its perforation, thereby further reducing the gaps in the occlusion stent. The woven mesh can better trap substances in the blood vessel, thus accelerating the occlusion time and meeting the clinical needs of acute vascular embolism occlusion.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An occlusion stent, characterized in that, include: The support part and the intercepting part are provided; the support part can be contracted and expanded to provide support, one end of the intercepting part is connected to the support part, and the other end gradually narrows and extends into a cone shape. Both the support part and the intercepting part are provided with hollows, and at least one of the support part and the intercepting part is provided with a woven mesh in the hollow.

2. The occlusion bracket according to claim 1, characterized in that, The support section, the interception section, and the woven mesh are all biodegradable.

3. The occlusion bracket according to claim 1, characterized in that, The woven mesh includes a first woven mesh disposed in the hollow of the interception section.

4. The occlusion bracket according to claim 3, characterized in that, The woven mesh also includes a second woven mesh disposed in the hollowed-out part of the support.

5. The occlusion bracket according to claim 1, characterized in that, The occlusion stent also includes a fixing element; the fixing element is installed on the support portion and can swing outward when the support portion is opened, thus fixing it to the inner wall of the blood vessel.

6. The occlusion bracket according to claim 5, characterized in that, The fastener is shaped like a protruding spike.

7. The occlusion bracket according to claim 5, characterized in that, The fastener is installed inside the hollow part of the support.

8. The occlusion bracket according to claim 5, characterized in that, The fastener is a biodegradable fastener.

9. The occlusion bracket according to claim 1, characterized in that, The support portion is provided with a developing hole, which is used to place developing material.

10. A balloon occlusion catheter, characterized in that, include: Catheters, balloons, and occlusion stents; The catheter is connected to the balloon, and the occlusion stent can be fitted onto the balloon; the occlusion stent is the occlusion stent described in any one of claims 1-9.

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