Vascular extraluminal stent suitable for assisting internal jugular vein decompression
By designing an extravascular stent and using an elastic support body and a fixing part to provide support on the outside of the internal jugular vein, the problem that existing stents cannot resist compression from surrounding soft tissue is solved, and effective decompression and blood flow improvement of the internal jugular vein are achieved.
Patent Information
- Application Number
- CN202422699575.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-06
AI Technical Summary
Existing internal jugular vein stents are mainly used in the blood vessel cavity and cannot effectively resist the compression of the surrounding soft tissue, resulting in the inability to completely relieve the stenosis of the internal jugular vein, poor blood flow, and affecting the surgical effect.
An extravascular stent is designed, which uses an elastic support body and a fixing part (such as an elastic hook or adhesive) to provide support outside the blood vessel to prevent compression from surrounding tissues. The elastic hook abuts against the tissue or is fixed with an adhesive to limit the position of the stent and prevent sliding and rotation.
It effectively assists in the re-expansion of the internal jugular vein, relieves stenosis and poor blood flow, and prevents the stent from changing its position. It is easy to use and does not occupy the internal space of the blood vessel, thus improving the surgical effect.
Smart Images
Figure CN223311289U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and in particular relates to an extravascular stent suitable for assisting internal jugular vein decompression. Background Art
[0002] Internal jugular vein stenosis is one of the important causes of cerebral venous return obstruction, and compression by external factors is one of the main causes of internal jugular vein stenosis or even occlusion, among which compression by the transverse process of the atlas and the styloid process accounts for the highest proportion. Internal jugular vein decompression surgery with bone removal of the anterolateral part of the transverse process of the atlas can effectively relieve the compression and stenosis of the upper part of the internal jugular vein, improve the morphology and blood flow of the internal jugular vein, and alleviate the patient's clinical symptoms. However, after internal jugular vein decompression surgery with bone removal of the anterolateral part of the transverse process of the atlas, the internal jugular vein is still compressed to a certain extent by the surrounding soft tissue, resulting in unsatisfactory re-expansion of the internal jugular vein, inability to completely relieve vascular stenosis, and poor blood flow, which affects brain metabolism and leads to poor surgical results or recurrence of symptoms. At present, existing internal jugular vein stents are mainly used in the vascular lumen, and have limited support for the internal jugular vein lumen.
[0003] Therefore, a support device is designed to resist compression from surrounding tissues outside the internal jugular vein. Specifically, the support device is an extravascular stent suitable for assisting internal jugular vein decompression. Utility Model Content
[0004] In order to overcome the problems raised in the background technology, the present invention adopts the following technical solutions:
[0005] A vascular extraluminal stent suitable for assisting internal jugular vein decompression, comprising: a support body, the support body being tubular, the support body being axially penetrated by an opening, the support body comprising two groups of mirrored ends; the mirrored ends comprising two circumferential ends arranged on either side of the opening, each of the circumferential ends having a circumferential end face, the circumferential end face always coinciding with the central axis of the support body; the support body being elastic, and maintaining an initial state under the action of elasticity when not subject to external force, the angle between the two circumferential end faces in the initial state being 90°; the mirrored ends further comprising an axial end mirrored in the axial direction of the support body, each of the axial ends having an axial end face, the axial end face being perpendicular to the central axis of the support body; a fixing portion connected to a group of the mirrored ends.
[0006] Furthermore, the fixing portion is a plurality of elastic hooks, which are respectively arranged on the outside of the two axial ends around the central axis of the support body. The rotation direction of each elastic hook arranged on one of the axial ends is the same, but the rotation directions of the elastic hooks on the axial ends on both sides are opposite. When the support body is installed on the patient's blood vessel, the elastic hooks will abut against the patient's surrounding tissue when the support body rotates circumferentially and provide resistance in the opposite direction for the support body, thereby preventing the support body from rotating around the blood vessel or sliding along the blood vessel.
[0007] Furthermore, the fixing portion is a plurality of elastic hooks, which are arranged around the central axis of the support body on the outside of the axial end portion. The elastic hooks arranged on one of the axial ends have at least two different rotation directions, and the elastic hooks are symmetrically arranged on the two axial ends. When the support body is installed on the patient's blood vessel, the elastic hooks will abut against the patient's surrounding tissue when the support body rotates circumferentially and provide resistance in the opposite direction for the support body, thereby preventing the support body from rotating around the blood vessel or sliding along the blood vessel.
[0008] Furthermore, the fixing portion is a plurality of elastic hooks, which are evenly distributed on the outside of the circumferential end portion. The rotation directions of the elastic hooks arranged on one of the circumferential end portions are the same, and the rotation directions of the elastic hooks on the two opposite circumferential end portions are opposite, thereby limiting the circumferential rotation, axial movement and radial movement of the support body after the support body is installed outside the patient's blood vessel.
[0009] Furthermore, the fixing portion is a plurality of elastic hooks, which are evenly distributed on the outside of the circumferential end portion. The elastic hooks arranged on each of the circumferential end portions include at least two different rotation directions, thereby limiting the circumferential rotation, axial movement and radial movement of the support body after the support body is installed outside the patient's blood vessel.
[0010] Furthermore, the fixing portion is an adhesive, which is connected to the two axial ends of the support body. The adhesive is sticky on the side facing the central axis of the support body and the side away from the central axis of the support body, and is respectively used to bond with the patient's venous blood vessels and surrounding tissues. After the support body is installed on the patient's blood vessels, the axial movement, circumferential movement, and radial movement of the support body are all restricted by the adhesive.
[0011] Furthermore, the fixing portion is an adhesive, which is connected to the two circumferential ends of the support body. The adhesive is sticky on the side facing the central axis of the support body and the side away from the central axis of the support body, and is respectively used to bond with the patient's venous blood vessels and surrounding tissues. After the support body is installed on the patient's blood vessels, the axial movement, circumferential movement, and radial movement of the support body are all restricted by the adhesive.
[0012] Furthermore, when the openings of the support body move away from each other under the drive of an external force, the support body leaves the initial state and the angle between the two circumferential end faces is greater than 90 degrees. The spacing between the two circumferential end portions can be greater than the inner diameter of the support body in the initial state when the openings move away from each other, so that it can be sleeved on the internal jugular vein in this state.
[0013] Furthermore, the thickness of the support body is uniform; the material of the support body is nickel-titanium alloy, which has good biocompatibility and flexibility.
[0014] Furthermore, the support body includes two groups of spiral cables with opposite rotation directions, and each group of spiral cables is cross-wound; the support body is made of nickel-titanium alloy, which has good biocompatibility and flexibility.
[0015] Beneficial effects of the utility model:
[0016] 1. When in use, this stent is placed on the outside of the internal jugular vein where the surrounding soft tissue is constantly squeezed, the lumen is difficult to re-expand, and the blood circulation is poor. Its working principle is to stretch the surrounding soft tissue outside the patient's blood vessel outward to prevent the surrounding soft tissue from squeezing the blood vessel inward, making it difficult or narrowing the internal jugular vein. This is different from the setting method of conventional stents implanted inside the patient's blood vessels. The supporting body of this stent is elastic. When placed, it opens the opening and adapts to the patient's blood vessel segment where the lumen is not ideal for re-expansion. It restores its original shape under the action of its own elasticity. It is easy to use and convenient for medical staff to intuitively observe the position of the stent, and it does not occupy the space inside the blood vessel after placement. The setting of this stent has excellent practical effects. It can effectively resist the compression of the surrounding soft tissue on the blood vessel outside the internal jugular vein, thereby assisting the internal jugular vein in re-expanding and alleviating the stenosis and poor blood flow of the internal jugular vein.
[0017] 2. By providing elastic hooks or adhesive elements at two opposing ends of the support body, the support body can expand outward after being placed outside the blood vessel and abut against the surrounding tissue. The adhesive elements, which adhere to the surrounding tissue, can maintain the support body in its initial position and inhibit movement. The elastic hooks, which abut against the surrounding tissue and deform to store energy when the support body moves, release this energy to maintain the support body in its initial position. This effectively prevents the support body from shifting position or becoming dislodged from the patient's blood vessel after placement. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:
[0019] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model when the support body is in an initial state;
[0020] Figure 2 This is a schematic diagram of the overall structure of Example 2 of the utility model when the supporting body is in an initial state;
[0021] Figure 3 This is a schematic diagram of the overall structure of Example 3 of the present utility model when the supporting body is in an initial state;
[0022] Figure 4 It is a schematic diagram of the overall structure of Example 4 of the utility model when the supporting body is in the initial state;
[0023] Figure 5 It is a schematic diagram of the overall structure of Example 5 of the utility model when the supporting body is in the initial state;
[0024] Figure 6 This is a schematic diagram of the overall structure of Example 6 of the utility model when the supporting body is in an initial state;
[0025] Figure 7 This is a schematic diagram of the overall structure of Example 7 of the utility model when the supporting body is in an initial state;
[0026] In the figure, 1. support body; 11. opening; 12. mirror end; 121. circumferential end; 1211. circumferential end face; 122. axial end; 1221. axial end face; 13. spiral cable; 2. fixing portion; 21. elastic hook; 22. adhesive member. DETAILED DESCRIPTION
[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention through specific embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0028] Example 1
[0029] An extravascular stent suitable for assisting internal jugular vein decompression, such as Figure 1 As shown, it includes: a support body 1, the support body 1 is tubular, and an opening 11 is provided through the support body 1 along the axial direction, and the support body 1 includes two groups of mirrored ends 12; the mirrored end 12 includes two circumferential ends 121 arranged on both sides of the opening 11, each circumferential end 121 has a circumferential end face 1211, and the circumferential end face 1211 always coincides with the central axis of the support body 1; the support body 1 is elastic, and when the support body 1 is not subjected to external force, it maintains an initial state under the action of elasticity, and the angle between the two circumferential end faces 1211 in the initial state is 90°; the mirrored end 12 also includes an axial end 122 mirrored in the axial direction of the support body 1, each axial end 122 has an axial end face 1221, and the axial end face 1221 is perpendicular to the central axis of the support body 1; a fixing part 2, connected to a group of mirrored ends 12.
[0030] A more preferred embodiment is as follows Figure 1 As shown, the fixing portion 2 comprises a plurality of elastic hooks 21, which are arranged around the central axis of the support body 1 on the outside of the two axial ends 122. The rotation direction of each elastic hook 21 arranged on one axial end 122 is the same, but the rotation directions of the elastic hooks 21 on the axial ends 122 on both sides are opposite. When the support body 1 is installed on the patient's blood vessel, the elastic hooks 21 will abut against the patient's surrounding tissue during the support body 1's circumferential rotation and provide resistance in the opposite direction to the support body 1, preventing the support body 1 from rotating around the blood vessel or sliding along the blood vessel. The elastic hooks 21 are in the shape of a curved sheet, with one end connected to the support body 1 and the other end extending in a rotational direction and abutting against the surrounding tissue of the blood vessel after the support body 1 is sheathed on the blood vessel.
[0031] A more preferred embodiment is as follows Figure 1 As shown, when the openings 11 of the support body 1 move away from each other under the drive of external force, the support body 1 leaves the initial state and the angle between the two circumferential end faces 1211 is greater than 90 degrees. The spacing between the two circumferential end portions 121 can be greater than the inner diameter of the support body 1 in the initial state when the openings 11 move away from each other, so that it can be sleeved on the internal jugular vein in this state.
[0032] A more preferred embodiment is as follows Figure 1 As shown, the support body 1 includes two groups of spiral cables 13 with opposite rotation directions, and each group of spiral cables 13 is cross-wound; the support body 1 is made of nickel-titanium alloy, which has good biocompatibility and flexibility.
[0033] Example 2
[0034] Different from other embodiments, such as Figure 2 As shown, the fixing portion 2 is a plurality of elastic hooks 21, which are arranged around the central axis of the support body 1 on the outside of the axial end 122. The elastic hooks 21 arranged on one of the axial ends 122 have at least two different rotation directions. The elastic hooks 21 are symmetrically arranged on the two axial ends 122. When the support body 1 is installed on the patient's blood vessel, the elastic hooks 21 will abut against the patient's surrounding tissue when the support body 1 rotates circumferentially and provide resistance in the opposite direction for the support body 1, thereby preventing the support body 1 from rotating around the blood vessel or sliding along the blood vessel.
[0035] Example 3
[0036] Different from other embodiments, such as Figure 3 As shown, the fixing portion 2 is a plurality of elastic hooks 21, which are evenly distributed on the outside of the circumferential end portion 121. The rotation directions of the elastic hooks 21 arranged on one of the circumferential end portions 121 are the same, and the rotation directions of the elastic hooks 21 on the two opposite circumferential end portions 121 are opposite, thereby limiting the circumferential rotation, axial movement and radial movement of the support body 1 after the support body 1 is installed outside the patient's blood vessel.
[0037] Example 4
[0038] Different from other embodiments, such as Figure 4 As shown, the fixing portion 2 is a plurality of elastic hooks 21, which are evenly distributed on the outside of the circumferential end portion 121. The elastic hooks 21 arranged on each circumferential end portion 121 include at least two different rotation directions, thereby limiting the circumferential rotation, axial movement and radial movement of the support body 1 after the support body 1 is installed outside the patient's blood vessel.
[0039] Example 5
[0040] Different from other embodiments, such as Figure 5 As shown, the fixing portion 2 is an adhesive 22, which is connected to the two axial ends 122 of the support body 1. The adhesive 22 is sticky on both the side facing the central axis of the support body 1 and the side away from the central axis of the support body 1, and is respectively used to bond with the patient's venous blood vessels and surrounding tissues. After the support body 1 is installed on the patient's blood vessels, the axial movement, circumferential movement, and radial movement of the support body 1 are all restricted by the adhesive 22.
[0041] Example 6
[0042] Different from other embodiments, such as Figure 6As shown, the fixing portion 2 is an adhesive 22, which is connected to the two circumferential ends 121 of the support body 1. The adhesive 22 is sticky on both the side facing the central axis of the support body 1 and the side away from the central axis of the support body 1, and is respectively used to bond with the patient's venous blood vessels and surrounding tissues. After the support body 1 is installed on the patient's blood vessels, the axial movement, circumferential movement, and radial movement of the support body 1 are all restricted by the adhesive 22.
[0043] Example 7
[0044] Different from other embodiments, such as Figure 7 As shown, the support body 1 has a uniform thickness and a smooth outer wall. It is formed by laser cutting or mold forming, and is cylindrical in shape as a whole and is divided by an opening 11 that is set along the axial direction. The surrounding angle of the part of the support body 1 without the opening 11 is 270 degrees; the material used to make the support body 1 is nickel-titanium alloy, which has good biocompatibility and flexibility.
Claims
1. An extravascular stent suitable for assisting internal jugular vein decompression, characterized in that: include: A support body, wherein the support body is tubular, an opening is provided through the support body in the axial direction, and the support body includes two sets of mirror-image ends; The mirror end portion includes two circumferential end portions arranged on both sides of the opening, each of the circumferential end portions having a circumferential end surface, and the circumferential end surface always coincides with the central axis of the support body; The support body is elastic and maintains an initial state under the action of elasticity when not subjected to external force, and the angle between the two circumferential end faces in the initial state is 90°; The mirror end portion further includes an axial end portion mirror-set in the axial direction of the support body, each of the axial end portions having an axial end surface, and the axial end surface is perpendicular to the central axis of the support body; A fixing portion is connected to a set of the mirror image ends.
2. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The fixing portion is a plurality of elastic hooks, which are respectively arranged around the central axis of the support body on the outside of the two axial ends. The rotation direction of each elastic hook arranged on one of the axial ends is the same, but the rotation directions of the elastic hooks on the axial ends on both sides are opposite.
3. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The fixing portion is a plurality of elastic hooks, which are arranged around the central axis of the support body on the outside of the axial end. The elastic hooks arranged on one of the axial ends have at least two different rotation directions, and the elastic hooks are symmetrically arranged on the two axial ends.
4. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The fixing portion is a plurality of elastic hooks, which are evenly distributed on the outside of the circumferential end portion. The elastic hooks arranged on one of the circumferential end portions have the same rotation direction, while the elastic hooks on the two opposite circumferential end portions have opposite rotation directions.
5. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The fixing portion is a plurality of elastic hooks, which are evenly distributed on the outside of the circumferential end portion. The elastic hooks arranged on each of the circumferential end portions include at least two different rotation directions.
6. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The fixing portion is an adhesive member connected to two axial ends of the support body, and the adhesive member is sticky on both the side facing the central axis of the support body and the side facing away from the central axis of the support body.
7. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The fixing portion is an adhesive member connected to two circumferential ends of the support body, and the adhesive member is sticky on both the side facing the central axis of the support body and the side facing away from the central axis of the support body.
8. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: When the openings of the support body move away from each other under the drive of external force, the support body leaves the initial state and the angle between the two circumferential end faces is greater than 90 degrees. The spacing between the two circumferential end portions can be greater than the inner diameter of the support body in the initial state when the openings move away from each other.
9. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The support body has a uniform thickness.
10. The extravascular stent for assisting internal jugular vein decompression according to claim 1, characterized in that: The supporting body includes two groups of spiral cables with opposite rotation directions, and each group of spiral cables is cross-wound.