Aortic arch prefenestrated stent

Abstract

The utility model relates to the field of medical apparatus and instruments, concretely relates to aortic arch pre-windowing stent. The aortic arch pre-windowing stent includes hollow cylindrical main body, both ends of the main body are open, the body wall close to one end opening is equipped with the short stent part recessed to both sides body wall, the short stent part is provided with short stent assembly, and the included angle of first short stent, second short stent and the axis of the main body is 40~45 DEG. The aortic arch pre-windowing stent guarantees sufficient arch blood supply space, and through the same femoral artery access, the implantation of all stents is completed, without special carotid artery bypass, reduces the complication of cerebral blood vessels, and without puncturing guide wire or implanting branch stent as access in any one of carotid artery and subclavian artery, improves the safety and reliability of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to an aortic arch pre-fenestration stent. Background Technology

[0002] Currently, there are two technical approaches for treating aortic arch lesions: open-chest vascular replacement and endovascular intervention. Open surgery requires deep hypothermic circulatory arrest under cardiopulmonary bypass to complete the aortic arch vascular replacement; the most representative example is the Sun procedure. However, open surgery is highly invasive and requires cardiopulmonary bypass support. Interventional treatment includes two implantation methods: in vivo fenestration and pre-fenestration. In vivo fenestration requires puncturing the carotid artery for blood diversion before stent deployment, and quickly completing the opening of branches and stent implantation. Pre-fenestration stents, on the other hand, create branch vessels on the stent body in advance to maintain cerebral blood supply. However, the stent structure is complex, and it also requires access via the carotid artery and subclavian artery to reconstruct the branches, necessitating multiple branch vessel incisions or punctures. Endovascular intervention is still in its developmental stage; current in vivo fenestration techniques affect cerebral blood flow during the procedure and have a higher incidence of neurological complications. Pre-fenestration stent implantation is complex, often requiring custom stents, and has a long treatment cycle. Existing aortic arch fenestration stents require exposure of one or both carotid arteries and retrograde puncture to implant branch stents, which results in a complex overall stent structure, increased cerebrovascular complications, and prolonged operation time. Utility Model Content

[0003] To address the aforementioned issues, this invention improves the arrangement and orientation of the prefabricated branches. While ensuring sufficient blood supply space to the aortic arch, all stents are implanted via a single femoral artery approach, enabling endovascular interventional treatment of aortic aneurysms or aortic dissections involving the aortic arch. The arrangement and angle of the window branches are key features of this invention.

[0004] This invention provides an aortic arch pre-fenestration stent, comprising a hollow cylindrical body with openings at both ends; a short stent portion recessed relative to the two side body walls is provided on the body wall near one end opening; a short stent assembly is disposed in the short stent portion, the short stent assembly comprising a first short stent, a second short stent, and a third short stent, which are hollow and connected to the body, arranged sequentially along the extension direction of the body; the first and second short stents penetrate the body wall and are open at both ends, one end opening inside the body and the other end opening outside the body; the inclination direction of each short stent is towards the end of the body near the short stent portion; the angle formed by the axis of the first and second short stents and the axis of the body is 40-45°, and the angle formed by the axis of the third short stent and the axis of the body is 0-45°.

[0005] In some embodiments of this utility model, the depth of the concave part of the short support portion is 0.5 to 1.0 cm.

[0006] In some embodiments of this utility model, the short support portion is sequentially connected with a first surface, a plane, and a second surface along the direction of extension from one end near the short support portion to the other end of the main body;

[0007] In some embodiments of this utility model, the first short bracket is disposed on the plane of the short bracket portion.

[0008] In some embodiments of this utility model, the second short bracket is disposed on the plane of the short bracket portion.

[0009] In some embodiments of this utility model, the third short support is disposed within the main body.

[0010] In some other embodiments of this invention, the third short support is disposed on a plane.

[0011] In some embodiments of this utility model, the diagonal of the front projection of the first short bracket and the second short bracket coincides with the front projection of the plane of the short bracket portion.

[0012] In some embodiments of this utility model, when the third short bracket is disposed inside the main body, the opening of the third short bracket is located on the second surface.

[0013] In some other embodiments of this utility model, when the third short bracket is disposed on a plane, the third short bracket penetrates the body wall of the main body and has openings at both ends, with one end opening located inside the main body and the other end opening located inside the main body, and the diagonal of the front projection of the third short bracket coincides with the frontal projection of the short bracket portion of the plane.

[0014] In some embodiments of this utility model, the outer diameter of the first short bracket is 1.0 to 1.5 cm, the total length of the first short bracket is equal to the outer diameter, and the thickness of the body wall of the first short bracket is 0.05 to 0.15 mm.

[0015] In some embodiments of this utility model, the outer diameter of the second short bracket is 1.0 to 1.5 cm, the total length of the second short bracket is equal to the outer diameter, and the thickness of the body wall of the second short bracket is 0.05 to 0.15 mm.

[0016] In some embodiments of this utility model, when the third short bracket is disposed inside the main body, the outer diameter of the third short bracket is 1.0 to 1.5 cm, the total length of the third short bracket is 2.0 to 3.0 cm, and the thickness of the body wall of the third short bracket is 0.05 to 0.15 mm.

[0017] In some other embodiments of this utility model, when the third short bracket is disposed on a plane, the outer diameter of the third short bracket is 1.0 to 1.5 cm, the total length of the third short bracket is equal to the outer diameter, and the thickness of the body wall of the third short bracket is 0.05 to 0.15 mm.

[0018] In some embodiments of this utility model, the distance between the first short bracket and the edge of the short bracket portion is 0.5 to 1.5 cm.

[0019] In some embodiments of this utility model, the distance between the center of the first short support and the center of the second short support is 1.5 to 2.5 cm.

[0020] In some embodiments of this utility model, the distance between the center of the second short support and the center of the third short support is 3 to 8 cm.

[0021] In some embodiments of this utility model, the outer diameter of the main body is 24-48 mm.

[0022] In some embodiments of this utility model, the thickness of the body wall of the main body is 0.05 to 0.15 mm.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention develops a novel pre-fenestrated aortic arch stent that simplifies the stent structure, optimizes the implantation method, completes all vascular reconstruction through a single femoral artery approach, reduces the diameter of the delivery tube, and decreases the chance of cutting or puncturing branch vessels.

[0025] Existing aortic arch fenestration stents require exposure of one or both carotid arteries and retrograde puncture to implant branch stents. This results in a complex overall stent structure, increased cerebrovascular complications, and prolonged operation time. The cause of this is directly related to the arrangement of the prefabricated branches. Therefore, this invention improves the arrangement and orientation of the prefabricated branches, ensuring sufficient blood supply space in the aortic arch while completing the implantation of all stents through the same femoral artery approach.

[0026] This novel aortic arch pre-fenestrated stent can help patients with aortic arch lesions avoid conventional open surgery, reducing trauma, improving surgical safety, and lowering hospitalization costs and length. Compared to other fenestrated stents, this product eliminates the need for carotid artery bypass grafting, reducing cerebrovascular complications. Furthermore, it eliminates the need for puncture guidewires or branch stents in either the carotid or subclavian artery, further reducing surgical trauma and complexity, and improving surgical safety and reliability. Attached Figure Description

[0027] Figure 1 This is a side view of the aortic arch fenestration stent of this utility model in its natural state.

[0028] Figure 2 This is a side view of the aortic arch fenestration stent of this utility model in a bent state.

[0029] Figure 3 This is a side view of another embodiment of the aortic arch fenestration stent of this utility model.

[0030] Figure 4 This is a schematic diagram of the aortic arch fenestration stent of this utility model in use.

[0031] Figure Labels

[0032] 1-Main body; 2-Short stent section; 21-First surface; 22-Plane; 23-Second surface; 3-Short stent assembly; 31-First short stent; 32-Second short stent; 33-Third short stent; 4-Covered small stent; 5-Braconid artery; 6-Common carotid artery; 7-Left subclavian artery. Detailed Implementation

[0033] In the description of this utility model, it should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" 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 utility model according to the specific circumstances.

[0035] This invention addresses aortic dissection or aortic aneurysm lesions involving the aortic arch and beyond, achieving aortic arch reconstruction through endovascular interventional techniques. This invention provides an aortic arch pre-fenestration stent, such as... Figure 1 and Figure 2 As shown.

[0036] In medical devices, the proximal end refers to the end of the device that is closest to the operator. For example, in long devices, the proximal end is usually the part that the operator holds or controls.

[0037] The distal end refers to the end of the instrument that is furthest from the operator. For example, in long instruments, the distal end is usually the part that enters the patient's body or contacts the target tissue.

[0038] The aortic arch pre-fenestration stent comprises a hollow cylindrical body 1 with openings at both ends.

[0039] The main body 1 is a cylindrical covered stent, which consists of a cylindrical metal mesh frame and a thin film covering the inner and outer surfaces of the metal mesh frame. It is used to support window branches for different branch arteries. The thin film can be, for example, a PTFE membrane.

[0040] The outer diameter of the main body 1 is 24-48 mm; the thickness of the body wall of the main body 1 is 0.05-0.15 mm.

[0041] The main body 1 has a short support portion 2 that is recessed relative to the two side walls on the body wall near one end opening; the short support portion 2 can be a groove or a recessed platform, and the spatial configuration of the short support portion 2 is not limited, as long as it is recessed and can be used to support and place the short support assembly 3.

[0042] For example, the short support part 2 can be integrally formed by directly recessing from the wall of the hollow cylindrical body to form the concave short support part, or it can be formed by connecting multiple hollow cylindrical bodies, connecting two hollow cylindrical bodies with equal outer diameters through a hollow body with a smaller outer diameter and a flat outer surface, and connecting the interfaces.

[0043] Specifically, the short stent portion 2 is located near the distal end of the aortic arch pre-fenestrated stent, that is, the end closest to the heart after implantation.

[0044] The depth of the concave part 2 of the short support part 2 is 0.5 to 1.0 cm, and the depth of the concave part 2 is the vertical distance from the original outer surface of the main body 1 to the lowest point of the concave part.

[0045] The short stent portion 2 is provided with a first surface 21, a plane 22, and a second surface 23 in sequence along the direction of the main body 1 from one end near the short stent portion 2 to the other end; specifically, along the direction from the distal end to the proximal end of the aortic arch pre-fenestrated stent, the first surface 21, the plane 22, and the second surface 23 are respectively.

[0046] This invention does not limit the length of the short support section. The length of the short support section 2 can be determined according to the distance between the short support components installed on it. The length only needs to be able to support all the short supports.

[0047] The short stent section 2 is provided with a short stent assembly 3, which includes three hollow short stents that are connected to the main body 1. These short stents serve as window branches on the main body, and the three window branches correspond to the brachiocephalic artery, common carotid artery, and left subclavian artery on the aortic arch, respectively. They are used to deliver covered stents 4 to complete the reconstruction of each branch vessel.

[0048] The short stent assembly 3 includes a hollow cylindrical first short stent 31, a second short stent 32, and a third short stent 33 that are connected to the main body 1 and are arranged sequentially along the extension direction of the main body 1. Specifically, their arrangement order is as follows: from the distal end to the proximal end of the aortic arch pre-fenestration stent, the first short stent 31, the second short stent 32, and the third short stent 33 are arranged sequentially.

[0049] The tilt direction of each short stent is towards one end of the main body 1 near the short stent portion 2; that is, the opening of each short stent faces the same end; specifically, the opening of each short stent faces the distal end of the aortic arch pre-fenestrated stent.

[0050] The first short support 31 penetrates the body wall of the main body 1 and has openings at both ends. One end of the opening is located inside the main body 1, and the other end is located outside the main body 1; that is, part of the first short support 31 is located outside the main body, and the other part is located inside the main body.

[0051] Specifically, the first short support 31 is partially embedded in the plane 22 of the short support portion 2, that is, the first short support 31 penetrates the plane 22 of the short support portion 2. A part of the first short support 31 is located outside the main body 1, and one end of the first short support 31 is open outside the main body 1 so that it can be used to insert the film-coated small support 4. The other part of the first short support 31 is located inside the main body 1, and one end of the first short support 31 is open inside the main body 1 so that it communicates with the inside of the main body 1.

[0052] The first short stent 31 is oriented toward the distal end of the aortic arch pre-fenestrated stent.

[0053] The angle (equivalent to angle α) formed between the axis of the first short support 31 and the axis of the main body 1 is 40 to 45°, preferably 45°.

[0054] The diagonal of the front projection of the first short bracket 31 coincides with the front projection of the plane 22 of the short bracket portion 2.

[0055] The outer diameter of the first short bracket 31 is 1.0 to 1.5 cm.

[0056] The total length of the first short bracket 31 is equal to its outer diameter, and the total length includes the length of the portion of the first short bracket located outside the main body and the length of the portion of the first short bracket located inside the main body.

[0057] The thickness of the body wall of the first short support 31 is 0.05 to 0.15 mm.

[0058] The distance between the first short bracket 31 and the edge of the short bracket portion is 0.5 to 1.5 cm; that is, the distance between the center of the first short bracket 31 and the starting position of the concave part of the distal short bracket portion.

[0059] During use, the covered stent is delivered to the brachiocephalic artery along the direction of the first short stent 31 to complete the blood flow reconstruction of the brachiocephalic artery.

[0060] The second short support 32 penetrates the body wall of the main body 1 and has openings at both ends. One end of the opening is located inside the main body 1, and the other end is located outside the main body 1; that is, part of the second short support 32 is located outside the main body, and the other part is located inside the main body.

[0061] Specifically, the second short support 32 is partially embedded in the plane 22 of the short support portion 2, that is, the second short support 32 penetrates the plane 22 of the short support portion 2. A part of the second short support 32 is located outside the main body 1, and one end of the second short support 32 is open outside the main body 1 so that it can be used to insert a film-coated small support. The other part of the second short support 32 is located inside the main body 1, and one end of the second short support 32 is open inside the main body 1 so that it communicates with the inside of the main body 1.

[0062] The second short stent 32 is oriented toward the distal end of the aortic arch pre-fenestrated stent.

[0063] The angle (equivalent to angle β) formed between the axis of the second short support 32 and the axis of the main body 1 is 40 to 45°, preferably 45°.

[0064] The diagonal of the front projection of the second short bracket 32 ​​coincides with the front projection of the plane 22 of the short bracket part 2.

[0065] The outer diameter of the second short bracket 32 ​​is 1.0 to 1.5 cm.

[0066] The total length of the second short bracket 31 is equal to its outer diameter, and the total length includes the length of the portion of the second short bracket located outside the main body and the length of the portion of the second short bracket located inside the main body.

[0067] The thickness of the body wall of the second short support 32 is 0.05 to 0.15 mm.

[0068] The distance between the center of the first short bracket 31 and the center of the second short bracket 32 ​​is 1.5 to 2.5 cm;

[0069] During use, the covered stent is delivered to the left common carotid artery along the direction of the second short stent 32 to complete the revascularization of blood flow in the left common carotid artery.

[0070] The third short support 33 can be disposed within the main body 1. The opening of the third short support 33 is located on the second surface 23, that is, the entire third short support 33 is located within the main body 1, but one end of it opens on the second surface 23, and the other end opens inside the main body 1, for inserting a film-coated small support, such as... Figure 2 .

[0071] At this time, the angle between the axis of the third short support 33 and the axis of the main body 1 is 0 to 5°; preferably, the axis of the third short support 33 is parallel to the axis of the main body 1.

[0072] At this time, the outer diameter of the third short bracket 33 is 1.0 to 1.5 cm, and the total length of the third short bracket 33 is 2.0 to 3.0 cm.

[0073] The third short bracket 33 can also be partially embedded in the plane 22 of the short bracket portion 2, such as... Figure 3 At this time, the third short support 33 penetrates the body wall of the main body 1 and has openings at both ends. One end of the opening is located inside the main body 1, and the other end is located outside the main body 1; that is, part of the third short support 33 is located outside the main body 1, and the other part is located inside the main body 1.

[0074] Specifically, the third short support 33 penetrates the plane 22 of the short support portion 2. A part of the third short support 33 is located outside the main body 1 and has an opening at one end outside the main body 1 so as to be used for inserting a film-coated small support. The other part of the third short support 33 is located inside the main body 1 and has an opening at one end inside the main body 1 so as to communicate with the inside of the main body 1.

[0075] At this time, the third short stent 33 is oriented toward the distal end of the aortic arch pre-fenestrated stent.

[0076] At this time, the angle between the axis of the third short support 33 and the axis of the main body 1 is 40 to 45°, preferably 45°.

[0077] At this time, the diagonal of the front projection of the third short bracket 33 coincides with the projection of the plane 22 of the short bracket part 2.

[0078] At this time, the outer diameter of the third short bracket 33 is 1.0 to 1.5 cm.

[0079] At this time, the total length of the third short bracket 33 is equal to the outer diameter, and the total length includes the length of the third short bracket located outside the main body and the length of the third short bracket located inside the main body.

[0080] The thickness of the body wall of the third short support 33 is 0.05 to 0.15 mm.

[0081] The distance between the center of the second short support 32 and the center of the third short support 33 is 3 to 8 cm.

[0082] During use, a covered stent is delivered along the third short stent to the left subclavian artery to complete the revascularization of blood flow in the left subclavian artery.

[0083] The thickness of the body wall of each of the short supports is 0.05 to 0.15 mm.

[0084] The aortic arch pre-fenestration stent is composed of a metal mesh frame and a thin film covering the surface of the metal mesh frame. That is, the aortic arch pre-fenestration stent is first formed by hollowing out the metal mesh frame into the shape of the main body 1, the short stent part 2, and the short stent assembly 3. Then, the thin film is attached to the inner and outer surfaces of the metal mesh frame to form a complete aortic arch pre-fenestration stent.

[0085] The aortic arch pre-fenestration stent is made of an elastic material. In its natural state, the aortic arch pre-fenestration stent remains in a straight line. In use, due to the pressure of the aortic arch vessel wall, the aortic arch pre-fenestration stent is forced to bend. In the bent state, the three short stents in the aortic arch pre-fenestration stent can be directed toward the brachiocephalic artery 5, the common carotid artery 6, and the left subclavian artery 7, respectively.

[0086] When using the aortic arch pre-fenestration stent of this utility model, such as Figure 4As shown, taking aortic arch aneurysm as an example, the aortic arch pre-fenestrated stent is first delivered to the aortic arch. The marking on the anterior edge of the first short stent 31 is aligned with the proximal end of the opening of the brachiocephalic artery 5 to ensure that each short stent is aligned with the three major branches of the aortic arch (brachiocephalic artery, left common carotid artery, and left subclavian artery). After the stent delivery device releases the aortic arch pre-fenestrated stent, aortic arch angiography is performed again to confirm the position of the aortic arch pre-fenestrated stent and whether each short stent (first short stent, second short stent, and third short stent) is well visualized. The stent delivery device is then withdrawn. A guidewire catheter is inserted through the same approach to sequentially overselect the three short stents (window branches) reserved by the aortic arch pre-fenestrated stent. From distal to proximal, the brachiocephalic artery 5, common carotid artery 6, and left subclavian artery 7 are selected sequentially. Covered small stents 4 of the corresponding size are implanted. Based on the visualization lines at both ends of each short stent (window branch), it is confirmed that the covered small stent 4 fully overlaps with each short stent (window branch). After release, the reconstruction of the upper branches of the aortic arch is completed. A second aortic arch angiography confirmed that the stent was in place, the branches were patent, and there was no endoleak in the aneurysm.

[0087] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pre-fenestrated aortic arch stent, characterized in that, The aortic arch pre-fenestration stent includes a hollow cylindrical body (1) with openings at both ends; a short stent portion (2) is provided on the body wall near one end opening of the body (1), which is concave relative to the two sides of the body wall; a short stent assembly (3) is provided in the short stent portion (2), and the short stent assembly (3) includes a first short stent (31), a second short stent (32), and a third short stent (33) that are hollow and connected to the body (1) and are arranged sequentially along the extension direction of the body; the first short stent ( 31) The second short support (32) penetrates the body wall of the main body (1) and has openings at both ends. One end of the opening is located inside the main body (1), and the other end of the opening is located outside the main body (1). The tilt direction of each short support is towards the end of the main body (1) near the short support part (2). The angle between the axis of the first short support (31) and the axis of the second short support (32) and the axis of the main body (1) is 40 to 45°. The angle between the axis of the third short support (33) and the axis of the main body (1) is 0 to 45°.

2. The aortic arch pre-fenestration stent according to claim 1, characterized in that, The depth of the concave part of the short support (2) is 0.5 to 1.0 cm.

3. The aortic arch pre-fenestration stent according to claim 1, characterized in that, The short support portion (2) is provided with a first surface (21), a plane (22) and a second surface (23) in sequence along the direction of extension from one end of the short support portion (2) to the other end of the main body (1).

4. The aortic arch pre-fenestration stent according to claim 3, characterized in that, The first short bracket (31) and the second short bracket (32) are disposed on the plane (22) of the short bracket portion (2).

5. The aortic arch pre-fenestration stent according to claim 3, characterized in that, The third short support (33) is disposed inside the main body (1); Alternatively, the third short support (33) may be disposed on the plane (22).

6. The aortic arch pre-fenestration stent according to claim 4, characterized in that, The diagonal of the front projection of the first short bracket (31) and the second short bracket (32) coincides with the front projection of the plane (22) of the short bracket part (2).

7. The aortic arch pre-fenestration stent according to claim 5, characterized in that, When the third short bracket (33) is disposed inside the main body (1), the opening of the third short bracket (33) is located on the second surface (23); When the third short support (33) is set on the plane (22), the third short support (33) penetrates the body wall of the main body (1) and has openings at both ends. One end of the opening is located inside the main body (1), and the other end of the opening is located outside the main body (1). The diagonal of the front projection of the third short support (33) coincides with the projection of the plane (22) of the short support part (2).

8. The aortic arch pre-fenestration stent according to claim 1, characterized in that, The outer diameter of the first short support (31) is 1.0 to 1.5 cm, the total length of the first short support (31) is equal to the outer diameter, and the thickness of the body wall of the first short support (31) is 0.05 to 0.15 mm. And / or, the outer diameter of the second short support (32) is 1.0 to 1.5 cm, the total length of the second short support (32) is equal to the outer diameter, and the thickness of the body wall of the second short support (32) is 0.05 to 0.15 mm; And / or, when the third short support (33) is disposed in the main body (1), the outer diameter of the third short support (33) is 1.0 to 1.5 cm, the total length of the third short support (33) is 2.0 to 3.0 cm, and the thickness of the body wall of the third short support (33) is 0.05 to 0.15 mm; And / or, when the third short support (33) is disposed on the plane (22), the outer diameter of the third short support (33) is 1.0 to 1.5 cm, the total length of the third short support (33) is equal to the outer diameter, and the thickness of the body wall of the third short support (33) is 0.05 to 0.15 mm.

9. The aortic arch pre-fenestration stent according to claim 1, characterized in that, The distance between the first short bracket (31) and the edge of the short bracket portion (2) is 0.5 to 1.5 cm; And / or, the distance between the center of the first short support (31) and the center of the second short support (32) is 1.5 to 2.5 cm; And / or, the distance between the center of the second short support (32) and the center of the third short support (33) is 3 to 8 cm.

10. The aortic arch pre-fenestration stent according to claim 1, characterized in that, The outer diameter of the main body (1) is 24-48 mm; And / or, the thickness of the body wall of the main body (1) is 0.05 to 0.15 mm.

Images