Aortic arch covered stent and aortic arch covered stent assembly

Abstract

The invention belongs to the field of medical surgical instruments, and discloses an aortic arch covered stent which comprises a main covered stent body and a main covering film arranged on the stent body. The first puncture part and the second puncture part on the aortic arch section comprise an ascending aorta section, an aortic arch section and a descending aorta section which are connected in sequence, and the aortic arch section is longer than the ascending aorta section and the descending aorta section; the branch covered stent comprises a branch stent body and a branch covering film arranged on the branch stent body, and the branch covered stent is communicated with the aortic arch section; a first puncture part and a second puncture part are arranged on the aortic arch section and located on the two sides of the branch covered stent, and the positions where the first puncture part and the second puncture part are located are only composed of the main covered film. The invention further provides an aortic arch covered stent assembly. The aortic arch covered stent and the aortic arch covered stent assembly are simple in structure and convenient to use.

Description

Technical Field

[0001] The present invention belongs to the field of medical surgical instruments, and in particular relates to an aortic arch stent graft and an aortic arch stent graft assembly. Background Art

[0002] Aortic dissection (AD), also known as aortic dissecting aneurysm, is a serious cardiovascular emergency. When a rupture occurs in the intima of the arterial wall, blood enters the arterial wall through the rupture to form a hematoma, and further peels off the intima and media of the aorta, aortic dissection will occur. The generally recognized cause of the disease is the structural abnormality of the aortic media itself and the abnormal hemodynamics.

[0003] Aortic arch stent graft intervention is a simple, effective, and less invasive method for aortic dissecting aneurysm. However, since the release and positioning of the branch stent graft is difficult, the surgeon's operation requirements are high, and the overall operation time is long, if the branch stent is not positioned correctly, the long-term patency rate of the branch vessel will be low.

[0004] CN110507448A discloses an aortic arch stent graft blood vessel and a method of using the same. The aortic arch stent graft blood vessel is a five-segment three-branch structure, including an ascending aorta segment, a first transition segment, a middle narrowing segment, a second transition segment, a descending aorta segment, and three branch stent grafts. The two ends of the first transition segment are respectively connected to the ascending aorta segment and the middle segment; the two ends of the second transition segment are respectively connected to the middle segment and the descending aorta segment; the first branch stent graft is arranged on the first transition segment, and the second and third branch stent grafts are arranged on the second transition segment. The aortic arch stent graft blood vessel has a complex structure, and in actual use, there are still problems such as high requirements for the operator's operation and long overall operation time. Summary of the invention

[0005] In order to overcome the deficiencies and defects mentioned in the above background technology, the present invention provides an aortic arch stent graft and an aortic arch stent graft assembly which are simple in structure and easy to use.

[0006] In order to solve the above technical problems, the technical solution proposed by the present invention is as follows: an aortic arch stent graft, comprising: a main stent graft, comprising a main stent body and a main graft arranged on the stent body; the main stent graft comprises an ascending aorta segment, an aortic arch segment and a descending aorta segment connected in sequence, and the length of the aortic arch segment is greater than the length of the ascending aorta segment and the descending aorta segment; A branch stent graft, comprising a branch stent body and a branch graft disposed on the branch stent body, wherein the branch stent graft is in communication with the aortic arch segment; A first puncture portion and a second puncture portion are provided on both sides of the branch stent graft on the aortic arch segment, and the positions where the first puncture portion and the second puncture portion are located are only composed of the main stent graft.

[0007] In one embodiment, the diameter of the main stent graft is 20-50 mm, and the first puncture portion and the second puncture portion are circular and have a diameter of 5-20 mm.

[0008] In one embodiment, the entire annular portion of the aortic arch segment where the first puncture site and the second puncture site are located is the main covering.

[0009] In one embodiment, the semicircular ring on the aortic arch segment where the first puncture site and the second puncture site are located close to the first puncture site is composed of the main coating, and the other half of the semicircular ring is composed of the main stent body and the main coating.

[0010] In one embodiment, the distance between the center point of the first puncture portion and the center point of the first branch stent graft is 10-25 mm, and the distance between the center point of the second puncture portion and the center point of the first branch stent graft is 10-25 mm.

[0011] In one embodiment, the main stent is sutured with platinum-iridium alloy development points at the ascending aorta segment and the descending aorta segment.

[0012] In one embodiment, the material of the main stent body and the branch stent body is selected from one of stainless steel, cobalt alloy, nickel-titanium alloy, and magnesium alloy, and the material of the main coating and the branch coating is polyester fiber.

[0013] In one embodiment, the main stent graft and the branch stent graft are both formed by suturing a polyester film with a nickel-titanium alloy stent via polyester sutures.

[0014] In one embodiment, the main support body and the sub-support body each include a plurality of annular units disposed at intervals, and the annular units are wavy structures.

[0015] Based on the same inventive concept, an aortic arch stent graft assembly is also provided, comprising an aortic arch stent graft as described in any one of the above items, and also comprising a balloon and a guidewire, wherein the guidewire passes through the aortic arch stent graft and the branch stent graft, and after the balloon is inflated, it is located in the branch stent graft and a part of the balloon is located in the aortic arch stent graft.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: an aortic arch covered stent of the present application comprises: a main covered stent, comprising a main stent body and a main covering arranged on the stent body; a first puncture portion and a second puncture portion on the aortic arch segment comprise an ascending aorta segment, an aortic arch segment and a descending aorta segment connected in sequence; a branch covered stent, comprising a branch stent body and a branch covering arranged on the branch stent body, the branch covered stent being connected to the aortic arch segment; a first puncture portion and a second puncture portion are provided on both sides of the branch covered stent on the aortic arch segment, and the positions where the first puncture portion and the second puncture portion are located are only composed of the main covering. Only one branch stent graft is arranged on the main stent graft, and the first puncture part and the second puncture part arranged on both sides of the branch stent graft are only composed of the main coating. When in use, there is no need to accurately align the aortic arch stent graft. It is only necessary to implant the aortic arch stent graft in the ascending aorta, the aortic arch segment and the descending aorta. Since only one branch stent graft needs to be aligned with the branch blood vessel, the release operation is simple and easy. Then, after puncturing the first puncture part and the second puncture part using the puncture assembly, two branch stents are implanted. The first puncture part and the second puncture part only have a coating structure without a stent body, which greatly reduces the puncture alignment accuracy. Since there is no need for precise alignment, the operation process is greatly simplified, and the aortic arch stent graft is suitable for a wider range of uses. The aortic arch stent graft of the present invention has a simple structure and is easy to manufacture. It basically conforms to normal hemodynamics, is not easy to form intra-stent thrombosis, and does not require anticoagulation treatment in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic structural diagram of an aortic arch stent graft according to an embodiment; Figure 2 is a top view of an aortic arch stent graft according to one embodiment; Figure 3 is a schematic structural diagram of an aortic arch stent graft assembly according to one embodiment; Figure 4 It is a schematic structural diagram of an aortic arch stent graft assembly according to one embodiment.

[0019] Figure numerals: 10, main stent graft; 110, ascending aorta segment; 120, aortic arch segment; 130, descending aorta segment; 20, branch stent graft; 122, first puncture site; 124, second puncture site; 30, guide wire; 40, balloon. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0021] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0022] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0023] Please participate Figure 1-4 , an aortic arch stent graft of one embodiment of the present application comprises: a main stent graft 10 and a branch stent graft 20. The main stent graft 10 comprises a main stent body and a main graft disposed on the stent body. The main stent graft 10 comprises an ascending aorta segment 110, an aortic arch segment 120 and a descending aorta segment 130 connected in sequence. The branch stent graft 20 comprises a branch stent body and a branch graft disposed on the branch stent body. The branch stent graft 20 is connected to the aortic arch segment 120. A first puncture portion 122 and a second puncture portion 124 are provided on the aortic arch segment 120 at positions on both sides of the branch stent graft 20, and the positions where the first puncture portion 122 and the second puncture portion 124 are located are only composed of the main graft.

[0024] Specifically, in one embodiment, the material of the main support body and the sub-support body is selected from one of stainless steel, cobalt alloy, nickel-titanium alloy, and magnesium alloy. The main support body and the sub-support body both include a plurality of annular units arranged at intervals, and the annular units are wavy structures. By using the wavy annular structure unit as the unit structure of the support, the support provides a certain deformation space when subjected to force, is not prone to irregular deformation when subjected to force, and has strong structural strength.

[0025] The main stent and the branch stent are made of polyester fiber. Preferably, the main stent stent 10 and the branch stent stent are both made of polyester film sutured with a nickel-titanium alloy stent by polyester sutures. The main stent is sutured with platinum-iridium alloy development points at the ascending aorta segment 110 and the descending aorta segment 130 to facilitate development observation during implantation.

[0026] Specifically, in one embodiment, the diameter of the main stent graft 10 is 20-50 mm, the length of the aortic arch segment 120 is greater than the length of the ascending aorta segment 110 and the descending aorta segment 130, and the length of the aortic arch segment 120 is set longer, which is conducive to the placement of the first puncture portion 122 and the second puncture portion 124 on the aortic arch segment 120, and more importantly, it provides a larger available space for the first puncture portion 122 and the second puncture portion 124. In one embodiment, the entire annular section where the first puncture portion 122 and the second puncture portion 124 are located on the aortic arch segment 120 is the main coating, which is conducive to the puncture operation. Preferably, the diameter of the main stent graft is 20-50 mm, and the first puncture portion 122 and the second puncture portion 124 are circular and have a diameter of 5-20 mm. The area of ​​the first puncture portion 122 and the second puncture portion 124 is slightly larger than the area of ​​the connection between the branch vessel and the main vessel.

[0027] The semicircular ring where the first puncture part 122 and the second puncture part 124 are located on the aortic arch segment 120 is composed of the main coating, and the other half of the semicircular ring is composed of the main stent body and the main coating. In this way, the overall structural strength can be improved.

[0028] In one embodiment, the center point of the first puncture portion 122 is 10-25 mm away from the center point of the first branch stent graft 20, and the center point of the second puncture portion 124 is 10-25 mm away from the center point of the first branch stent graft 20. This distance setting provides a wider adaptability range for branch positions in different situations.

[0029] Based on the same inventive concept, an aortic arch stent graft assembly is also provided, comprising an aortic arch stent graft as described in any one of the above, and further comprising a balloon 40 and a guide wire 30. The guide wire 30 passes through the main stent graft 10 and the branch stent graft 20, and after the balloon is inflated, it is located in the branch stent graft 20 and a part of the balloon is located in the main stent graft 10.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: an aortic arch covered stent of the present application includes: a main covered stent composed of a main stent body and a main covering arranged on the stent body, including; a first puncture portion and a second puncture portion on the aortic arch segment include an ascending aorta segment, an aortic arch segment and a descending aorta segment connected in sequence; a branch covered stent, including a branch stent body and a branch covering arranged on the branch stent body, the branch covered stent being connected to the aortic arch segment; a first puncture portion and a second puncture portion are provided on both sides of the branch covered stent on the aortic arch segment, and the positions where the first puncture portion and the second puncture portion are located are only composed of the main covering. Only one branch stent graft is arranged on the first puncture part and the second puncture part on the aortic arch segment. The positions of the first puncture part and the second puncture part arranged on both sides of the branch stent graft are only composed of the main coating. When in use, there is no need to accurately align the aortic arch stent graft. It is only necessary to implant the aortic arch stent graft in the ascending aorta, the aortic arch segment and the descending aorta. Since only one branch stent graft needs to be aligned with the branch blood vessel, the release operation is simple and easy. Then, after puncturing the first puncture part and the second puncture part using the puncture assembly, two branch stents are implanted. The first puncture part and the second puncture part only have a coating structure, and there is no stent body, which also greatly reduces the puncture alignment accuracy. Since there is no need for precise alignment, the operation process is greatly simplified, and the aortic arch stent graft is suitable for the scope of use. The aortic arch stent graft of the present invention has a simple structure and is easy to manufacture; it basically conforms to normal hemodynamics, is not easy to form intra-stent thrombosis, and does not require anticoagulation treatment in the later stage.

Claims

1. An aortic arch stent graft, characterized in that: include: The main stent graft comprises a main stent body and a main graft disposed on the stent body; the first puncture portion and the second puncture portion on the aortic arch segment comprise an ascending aorta segment, an aortic arch segment and a descending aorta segment connected in sequence, and the length of the aortic arch segment is greater than the length of the ascending aorta segment and the descending aorta segment; A branch stent graft, comprising a branch stent body and a branch graft disposed on the branch stent body, wherein the branch stent graft is in communication with the aortic arch segment; A first puncture portion and a second puncture portion are provided on both sides of the branch stent graft on the aortic arch segment, and the positions where the first puncture portion and the second puncture portion are located are only composed of the main graft.

2. The aortic arch stent graft according to claim 1, characterized in that: The diameter of the main stent graft is 20-50 mm, and the first puncture portion and the second puncture portion are circular and have a diameter of 5-20 mm.

3. The aortic arch stent graft according to claim 1, characterized in that: The entire annular portion where the first puncture portion and the second puncture portion are located on the aortic arch segment is the main covering.

4. The aortic arch stent graft according to claim 1, characterized in that: The semicircular ring on the aortic arch segment where the first puncture part and the second puncture part are located and close to the first puncture part and the second puncture part is composed of the main coating, and the other half of the semicircular ring is composed of the main stent body and the main coating.

5. The aortic arch stent graft according to claim 2, characterized in that: The distance between the center point of the first puncture portion and the center point of the first branch stent graft is 10-25 mm, and the distance between the center point of the second puncture portion and the center point of the first branch stent graft is 10-25 mm.

6. The aortic arch stent graft according to claim 1, characterized in that: The main stent is sutured with platinum-iridium alloy developing points at the ascending aorta segment and the descending aorta segment.

7. The aortic arch stent graft according to claim 1, characterized in that: The material of the main stent body and the branch stent body is selected from one of stainless steel, cobalt alloy, nickel-titanium alloy and magnesium alloy, and the material of the main coating and the branch coating is polyester fiber.

8. The aortic arch stent graft according to claim 7, characterized in that: The main stent graft and the branch stent graft are both formed by suturing a polyester film with a nickel-titanium alloy stent through polyester sutures.

9. The aortic arch stent graft according to claim 1, characterized in that: The main support body and the sub-support body both include a plurality of annular units arranged at intervals, and the annular units are wavy structures.

10. An aortic arch stent graft assembly, characterized in that: The invention comprises the aortic arch stent graft as described in any one of claims 1 to 9, and further comprises a balloon and a guide wire. The aortic arch stent graft and the branch stent graft, after the balloon is inflated, are located in the branch stent graft and a part of the balloon is located in the aortic arch stent graft.

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