Individualized thoracic aorta stent system

Abstract

The invention provides an individualized thoracic aorta stent system. The individualized thoracic aorta stent system comprises an aortic arch stent and an ascending aorta stent, an anchoring area of the aortic arch stent is spliced and implanted into the ascending aorta stent, and an anchoring area of the ascending aorta stent serves as an anchoring area of the system; a first branch hole is pre-formed in the area, used for being connected with the branch stent, of the aortic arch stent, the first branch hole is used as a datum point to lock the trepanning area of the second branch hole and the trepanning area of the third branch hole, and the second branch hole and the third branch hole are formed in the trepanning area; and a movable or deformable or special-shaped skeleton structure is arranged in an opening area of the aortic arch stent. By splicing the aortic arch stent and the ascending aortic arch stent, the anchoring area of the aortic arch stent is arranged in the ascending aortic arch stent, the anchoring area of the ascending aortic arch stent serves as the anchoring area of the system, the anchoring area is moved forwards, a blood vessel branch fork is avoided, and the system can adapt to individuals which are not suitable for anchoring originally.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an individualized thoracic aorta stent system. Background Art

[0002] Existing thoracic aortic stents face the complex branch artery structure and individual differences in the aortic arch, and cannot completely solve the vascular diseases involving the aortic arch through stents. In 2024, the US FDA approved the registration of a dual-branch stent, which pointed out the direction for personalized solutions for the aortic arch.

[0003] In order to overcome the difficulties of the aortic arch and reconstruct the branches above the arch, a variety of stents and supporting treatment plans have been created at home and abroad. They can be mainly divided into: "chimney" or parallel stent technology, in situ fenestration technology, pre-fenestration technology, branch stent technology, and pre-bypass two-branch stent technology. For example, the improved aortic arch stent-graft type blood vessel with patent number CN201810982118 uses "chimney" or parallel stent technology to make the aortic stent easier to compress into a smaller diameter delivery system; the aortic arch in situ fenestration-specific covered stent with patent number CN202110212484 uses in situ fenestration technology to reduce the stenosis caused by compression of branch stents; a two-dimensional positioning template manufacturing method for aortic stent fenestration with patent number CN202110784724 uses pre-fenestration technology to shorten positioning time and reduce costs; the aortic arch stent-type blood vessel with patent number CN200810110799 uses branch stent technology to prevent the aortic arch stent-type blood vessels from interfering with each other; Endospan connects the left common carotid artery and the left subclavian artery with an artificial blood vessel in advance to block the circulation of the left common carotid artery, and reduces the difficulty of vascular interventional surgery at the aortic arch through combined treatment of the first branch stent, the ascending aorta stent and the second branch stent.

[0004] However, in actual application, the impact of individual differences is far more than that. For example, the anchoring length of the branch fork range of some blood vessels is insufficient or there is no qualified area, which is not suitable for anchoring, increasing the difficulty of stent placement; in addition, due to individual differences, the hole positions of the branch stents are also different. The hole positions of the three branch stents are different. If all are pre-opened at the same position, the adaptability is not enough, but all are customized, which takes a long time and has high costs. In addition, the aortic arch stent has a skeleton support. Since most existing skeletons are fixed to the aortic arch stent, the position of the branch hole cannot completely avoid the skeleton, because the skeleton obstruction will affect the docking of the branch hole and the branch stent. Summary of the invention

[0005] Based on this, it is necessary to provide an individualized thoracic aortic stent system to address the existing problems of unsuitable anchoring and differences in branch stent hole positions due to individual differences.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A personalized thoracic aorta stent system, comprising an aortic arch stent and an ascending aorta stent, wherein the anchoring region of the aortic arch stent is spliced ​​and implanted into the ascending aorta stent, and the anchoring region of the ascending aorta stent is used as the anchoring region of the system;

[0008] A first branch hole is pre-opened in the area on the aortic arch stent for connecting the branch stent, and the opening areas of the second branch hole and the third branch hole are locked with the first branch hole as a reference point, and the second branch hole and the third branch hole are opened in the opening area; the opening area of ​​the aortic arch stent is provided with a movable, deformable or irregular skeleton structure.

[0009] Furthermore, the skeleton structure includes a positioning bracket and an irregular wave-shaped bracket; the positioning bracket is arranged around the first branch hole, and the special-shaped bracket is arranged around the second branch hole and the third branch hole.

[0010] Furthermore, the peripheral surface of the opening area of ​​the aortic arch stent is covered with a double layer of film, and the skeleton structure is located in the interlayer gap of the double layer of film.

[0011] Furthermore, the skeleton structure is a notch bracket, which is annular as a whole and has a notch on one side that matches the opening area; the double-layer coating is sewn along its circumference to form an interlayer space that matches the notch bracket, and the notch bracket can be rotatably located in the interlayer space.

[0012] Furthermore, the skeleton structure is a small wave bracket, and a plurality of small wave brackets are slidably located in the interlayer gap of the double-layer coating.

[0013] Furthermore, the skeleton structure is a thin wave bracket with self-deformation, and multiple thin wave brackets are located in the interlayer gap of the double-layer coating. The half side of the thin wave bracket facing away from the hole area is sutured to the double-layer coating by sutures.

[0014] Furthermore, the peripheral surface of the opening area of ​​the aortic arch stent is covered with a single layer of film and presents an artificial blood vessel-like corrugated structure.

[0015] Further, the first branch hole, the second branch hole, and the third branch hole on the aortic arch stent are connected to branch stents correspondingly, and the branch stents include a brachiocephalic trunk branch stent, a left carotid common branch stent, and a left subclavian branch stent corresponding to the first branch hole, the second branch hole, and the third branch hole one by one; the brachiocephalic trunk branch stent, the left carotid common branch stent, and the left subclavian branch stent all include a covering and a branch skeleton arranged on the covering;

[0016] The coating includes a straight-tube coating, a straight-tube folded coating arranged on one end surface of the straight-tube coating, and a semi-wrapped coating wrapped on the outer surface of the straight-tube coating;

[0017] The branch skeleton includes a wave bracket, a sealing bracket and an inverted hanging bracket; the sealing bracket is located on the inner side of one end of the straight tube covering close to the straight tube folding covering, and the wave bracket is evenly distributed on other parts of the inner side of the straight tube covering; the inverted hanging bracket is arranged at the connection between the straight tube covering and the straight tube folding covering, and cooperates with the straight tube folding covering to seal the gap at the joint with the aortic arch bracket.

[0018] Furthermore, the inverted bracket includes a vertical portion and an inclined portion; the vertical portion extends from the connection between the straight-tube coating and the straight-tube folded coating to the inner side of the straight-tube coating and fits with the sealing bracket; the inclined portion is connected to the vertical portion, and the connection between the two forms an inverted angle, and the inclined portion is tightly attached to the outer side of the straight-tube folded coating and extends obliquely upward.

[0019] Furthermore, the two sides of the semi-wrapped coating are in a staggered serrated shape, and the two sides of the semi-wrapped coating are butt-jointed with a reversely wrapped straight-tube coating to reduce the diameter of the branch stent.

[0020] Compared with the prior art, the beneficial effects of the present invention include:

[0021] 1. The present invention arranges the anchoring area of ​​the aortic arch stent in the ascending aorta stent by splicing the aortic arch stent and the ascending aorta stent, so that the anchoring area of ​​the ascending aorta stent serves as the anchoring area of ​​the system, and moves the anchoring area forward to avoid the vascular branch fork, so that the system can adapt to individuals who were originally not suitable for anchoring;

[0022] 2. The present invention sets a reserved, movable or deformable skeleton structure in the opening area of ​​the aortic arch stent, which can support the aortic arch stent while coordinating the docking of the branch hole and the branch stent without blocking the intervention of the branch stent. It is the basis for achieving targeted window opening and the prerequisite for solving the standardization of stents.

[0023] 3. The present invention uses five parts, namely, the ascending aorta, the aortic arch and three branch stents, to solve the overall condition of the thoracic aorta in combination, and can also solve the local condition separately, thereby increasing the scope of application and solving the problem of difficulty in selecting the anchoring area when the condition is complicated;

[0024] 4. The present invention avoids the internal leakage problem at the splicing site of the branch stent and the aortic arch stent as much as possible through the cooperation of the straight-tube coating, the straight-tube folding coating, the semi-wrapped coating and the branch skeleton including the wave stent, the sealing stent and the inverted hanging stent; the inverted hanging structure realizes the splicing limit and reduces the difficulty of splicing, and the straight-tube folding coating realizes the sealing function similar to the sealing ring structure; the semi-wrapped structure can make the diameter of the branch stent smaller than the inner diameter of the blood vessel. When the semi-wrapped structure is not unlocked, the branch stent will not cause excessive friction trauma to the inner wall of the blood vessel, greatly reducing the risk of blood vessel rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. Among them:

[0026] Figure 1 This is a schematic structural diagram of a personalized thoracic aortic stent system introduced in the present invention;

[0027] Figure 2 This is a first example diagram of the special-shaped bracket introduced in Example 1;

[0028] Figure 3 This is a second example diagram of the special-shaped bracket introduced in Example 1;

[0029] Figure 4 This is a third example diagram of the special-shaped bracket introduced in Example 1;

[0030] Figure 5 This is a fourth example diagram of the special-shaped bracket introduced in Example 1;

[0031] Figure 6 This is a fifth example diagram of the special-shaped bracket introduced in Example 1;

[0032] Figure 7 This is a sixth example diagram of the special-shaped bracket introduced in Example 1;

[0033] Figure 8 This is a schematic diagram of the structure of the branch support introduced in Example 1;

[0034] Fig. 9 Based on Figure 8 A semi-perspective view of a branch support;

[0035] Fig.10 Based on Figure 8 Schematic diagram of the structure of the inverted bracket.

[0036] Fig.11 This is a schematic diagram of the structure of the notched bracket introduced in Example 2;

[0037] Fig.12 Based on Fig.11 Cross-sectional view of an aortic arch stent;

[0038] Fig.13 This is a schematic diagram of the structure of the small wave bracket introduced in Example 3;

[0039] Fig.14 A three-dimensional diagram of the thin wave support introduced in Example 4;

[0040] Fig.15 Based on Fig.14 Cross-sectional view of an aortic arch stent;

[0041] Fig.16 This is a schematic diagram of the structure of the corrugated structure introduced in Example 5;

[0042] Fig.17 Schematic diagram for confirming the starting point of the ascending aorta stent release;

[0043] Fig.18 Schematic diagram of the various processes for the placement of the brachiocephalic trunk branch stent;

[0044] Explanations in the figure: 1. Aortic arch stent; 11. First branch hole; 12. Second branch hole; 13. Third branch hole; 2. Ascending aorta stent; 3. Notch stent; 4. Small wave stent; 5. Thin wave stent; 6. Corrugated structure; 7. Branch stent; 71. Brachiocephalic branch stent; 72. Left common carotid branch stent; 73. Left subclavian branch stent; 701. Straight tube coating; 702. Straight tube folding coating; 703. Semi-wrapped coating; 704. Wave stent; 705. Sealed stent; 706. Inverted stent; 81. Positioning stent; 82. Special-shaped stent. DETAILED DESCRIPTION

[0045] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0046] Example 1

[0047] See also Figure 1 This embodiment introduces an individualized thoracic aorta stent system, which mainly includes an aortic arch stent 1, an ascending aorta stent 2 and a branch stent 7; wherein the branch stent 7 includes a brachiocephalic branch stent 71, a left common carotid branch stent 72, and a left subclavian branch stent 73.

[0048] The ascending aorta stent 2 and the branch stent 7 are selectively spliced ​​according to individual needs. When there is a complex vascular branch fork, that is, the anchoring area of ​​the branch fork is insufficient or there is no qualified area, the anchoring area of ​​the aortic arch stent 1 is spliced ​​into the ascending aorta stent 2. The anchoring area of ​​the ascending aorta stent 2 becomes the anchoring area of ​​the entire stent, and the entire anchoring area moves forward to avoid the original position of the complex vascular branch fork.

[0049] The aortic arch stent 1 has three branch holes, which are respectively used to connect with the brachiocephalic branch stent 71, the left common carotid branch stent 72, and the left subclavian branch stent 73. However, according to actual needs, if only two or one is needed, the other branch holes may not be opened and the branch stent 7 is not necessary.

[0050] The three branch holes are the first branch hole 11, the second branch hole 12 and the third branch hole 13. The three branch holes are opened before the aortic arch stent 1 enters the human body. The first branch hole 11 is opened at the factory, and the second branch hole 12 and the third branch hole 13 are opened adaptively according to the patient's arterial division before the operation.

[0051] The first branch hole 11 is first opened in the area of ​​the aortic arch stent 1 for connecting the branch stent 7, and the opening area of ​​the aortic arch stent 1 and the positions of the second branch hole 12 and the third branch hole 13 in the opening area are locked according to the pre-shot three-dimensional image and the position relationship of the first branch hole 11 on the aortic arch stent 1. Therefore, the first branch hole 11 is the reference point for opening the second branch hole 12 and the third branch hole 13.

[0052] Since the left carotid and left lock branch holes are customized by relevant personnel according to the three-dimensional blood vessel size of the disease, there are individual differences in the distribution of the hole positions. Generally, the skeleton of the stent is fixed, and the position of the hole cannot be guaranteed to avoid the skeleton. If the skeleton blocks the branch hole, the branch stent 7 cannot be spliced.

[0053] Therefore, a special-shaped skeleton structure is arranged on the circumferential surface where the opening area of ​​the aortic arch stent 1 is located. The skeleton structure is sutured to the aortic arch stent 1 by sutures. The skeleton structure includes a positioning stent 81 and an irregularly wavy special-shaped stent 82; the positioning stent 81 is arranged around the first branch hole 11, and the special-shaped stent 82 is arranged around the second branch hole 12 and the third branch hole 13, staggered from the first branch hole 11, the second branch hole 12 and the third branch hole 13. Figure 2-7 As shown, the special-shaped stents with different wave curvatures have the common feature of leaving a blank area on the left lock and left neck for doctors to make customized holes to meet personalized needs.

[0054] The operation method of the personalized thoracic aortic stent system of this embodiment is described below.

[0055] 1. Stent selection: Before the operation, based on the aortic data measured by CTA, the stent for aneurysm is selected to float 15-20% higher than the vessel diameter; for vascular dissection, the stent is selected to float 0-5% higher than the vessel diameter.

[0056] 2. Manual perforation of aortic arch stent 1: Take out the stent in the aortic arch conveyor, take the prefabricated first branch hole 11 (the branch hole connected to the brachiocephalic branch stent 71) as the reference, and according to the preoperative three-dimensional measurement, use a hole opener to complete the opening + ferrule suture of the second branch hole 12 and the third branch hole 13 (the branch holes connected to the left common carotid branch stent 72 and the left subclavian branch stent 73), and use an auxiliary device to reposition the stent into the conveyor.

[0057] 3. Confirmation of the release starting point of ascending aorta stent 2: Fig.17 As shown, the femoral artery is accessed, the soft guidewire enters the ascending aorta, and the hard guidewire is guided into the ascending aorta through the soft guidewire. Angiography is performed to determine the aortic valve and the left and right coronary arteries. The stent release range is 2 cm above the coronary artery.

[0058] 4. Placement of ascending aorta stent 2: The ascending aorta delivery device is guided by the guide wire and enters the ascending aorta to place the ascending aorta stent 2 (the tail end of the stent cannot cover the first branch hole 11), and then the delivery device is withdrawn.

[0059] 5. Placement of aortic arch stent 1: The aortic arch delivery device, guided by the guide wire and self-bending, enters the aortic arch, is first partially released (exposing the first branch hole 11 on the stent), and then a guide wire is inserted through the carotid artery into the first branch hole 11 of the aortic arch stent 1, and the holes are aligned through rotation adjustment (development positioning and guide wire verification).

[0060] 6. Branching balloon adjustment of aortic arch stent 1: carotid artery approach, the branching balloon catheter enters the hole position of the brachiocephalic artery and the aortic arch, aligns with the branch hole position on the aortic arch stent 1, and expands the balloon to make the stent passively adjusted, the branch hole is completely aligned with the branch artery, and the first branch hole 11 (brachiocephalic artery hole) is used as a reference to completely release the aortic arch stent 1 and withdraw the conveyor.

[0061] 7. Trunk balloon dilatation of aortic arch stent 1: via femoral artery access, the trunk balloon catheter enters the aortic arch (the front end covers the folded part, and the rear end reaches the posterior segment of the arch), and complete dilatation allows the aortic arch stent 1 to be released a second time, allowing the stent to completely adhere to the aortic wall, leaving no gap between the stent and the folded part of the arch stent, and withdrawing the branch balloon and the trunk balloon.

[0062] 8. Placement of brachiocephalic branch stent 71: Enter through the carotid artery, convey the brachiocephalic branch stent 71, and place the head end into the aortic arch. Release the branch stent 7 during the slow retreat (the trumpet of the branch stent 7 is located in the trunk artery during imaging), and then withdraw after completion.

[0063] 9. Branch balloon expansion of the brachiocephalic trunk stent: The branch balloon is guided by the guide wire into the hole between the brachiocephalic trunk artery and the aortic arch, and the balloon is expanded so that the interface of the branch stent 7 and the main stent fits tightly, and the balloon is withdrawn, and angiography is performed to verify the internal leakage.

[0064] 10. Placement of the left common carotid branch stent 72 and the left subclavian branch stent 73: Same steps as the brachiocephalic branch stent 71, but with different approaches.

[0065] 18 is a schematic diagram of the placement of the brachiocephalic trunk branch stent 71. Fig.18 (a) Schematic diagram of imaging positioning and guidewire verification; Fig.18 (b) is a schematic diagram of the branch balloon correction and positioning of the brachiocephalic artery hole (first branch hole 11); Fig.18 (c) Schematic diagram of the main balloon-expandable stent; Fig.18 (d) is a schematic diagram of the branch stent 7 expanded by a branch balloon.

[0066] Therefore, the stent system of the combined mode of this embodiment includes five parts: the ascending aorta, the aortic arch, and three branch arteries. It can be combined to solve the overall condition of the thoracic aorta, and can also be separately used to solve local conditions, thereby increasing the range of applicable conditions and solving the problem of difficult selection of anchoring areas in complex conditions. Among them, the ascending aorta is placed first; the aortic arch and the ascending aorta are spliced ​​during the operation.

[0067] The three corresponding windows on the aortic arch stent are all opened before the aortic arch stent 1 enters the human body; among them, the window of the brachiocephalic branch stent 71 is opened at the factory, and the windows of the left common carotid branch stent 72 and the left subclavian branch stent 73 are adaptively opened by the surgeon according to the patient's arterial distribution before the operation.

[0068] The stent design of the aortic arch completely prevents interference problems and solves the problem of the skeleton affecting the docking of the branch hole and the branch stent 7. It is the basis for achieving targeted window opening and the prerequisite for solving stent standardization.

[0069] The brachiocephalic trunk branch stent 71, the left common carotid branch stent 72, and the left subclavian branch stent 73 all include a coating and a branch skeleton disposed on the coating.

[0070] like Figure 8As shown, the coating includes a straight coating 701, a straight folded coating 702 arranged on one end face of the straight coating 701, and a semi-wrapped coating 703 wrapped on the outer surface of the straight coating 701; the straight coating 701 provides a basic sealing function. The straight folded coating 702 is formed by folding a cylindrical coating and fixed at the head end. After the branch stent 7 and the aortic arch stent 1 are spliced, there will actually be a certain gap between the hole and the stent. This is because of the gap caused by the suture and the incompletely fitted splicing. The straight folded coating 702 is added to achieve a sealing function similar to a sealing ring structure, and the structural coating is further blocked to achieve a better splicing and sealing effect. The two sides of the semi-wrapped coating 703 are staggered serrated. The serrated ends of the semi-wrapped coating 703 are connected by a wire to reversely wrap the stent. The semi-wrapped structure can prevent the branch stent from being unfolded after the branch stent is pushed out by the conveyor during the intervention process. The diameter of the branch stent will be smaller than the inner diameter of the blood vessel. This means that when the semi-wrapped structure is not unlocked, the branch stent will not cause excessive friction trauma to the inner wall of the blood vessel during the process of rotating or telescoping to adjust the position or posture of the branch stent, thereby greatly reducing the risk of blood vessel rupture.

[0071] like Figure 9-10 As shown, the branch skeleton includes a wave bracket 704, a sealing bracket 705 and an inverted bracket 706 which are sequentially arranged on the coating; the sealing bracket 705 is located on the inner side of one end of the straight coating 701 close to the straight folded coating 702, and the wave bracket 704 is evenly distributed in other parts of the inner side of the straight coating 701; the inverted bracket 706 is arranged at the connection between the straight coating 701 and the straight folded coating 702; the wave bracket 704 is a common bracket structure, providing support force and end anchoring function. The wave curvature of the sealing bracket 705 is different from that of the wave bracket 704, close to the connection with the aortic arch bracket 1, providing enhanced support and higher support density, achieving a better fitting effect to achieve a splicing and sealing effect. The inverted bracket 706 includes a vertical portion and an inclined portion; the vertical portion extends from the connection between the straight tube film 701 and the straight tube folded film 702 to the inside of the straight tube film 701, and fits with the sealing bracket 705; the inclined portion is connected to the vertical portion, and the connection between the two forms an inverted angle, and the inclined portion is close to the outside of the straight tube folded film 702 and extends upwardly. The inverted bracket 706 can provide a limiting function during the splicing process. In addition, a certain reverse inverted angle ensures that during the splicing process, the branch bracket film will extend into the hole by 2 to 3 mm, which means that the part in contact with the hole edge is always within the range of enhanced sealing, ensuring that the contact with the hole edge is at the height of the sealing structure, achieving a better splicing and sealing effect.

[0072] Therefore, the sealing bracket 705 , the inverted bracket 706 and the straight folded film 702 constitute a reinforced sealing area of ​​the branch bracket 7 .

[0073] Example 2

[0074] like Figure 11-12 As shown, the skeleton structure of this embodiment adopts a notched bracket 3, which is annular in shape as a whole, and has a notch on one side of the notched bracket 3, so the whole structure is similar to a columnar structure with a notch. Fig.11 As shown, the rectangular area is the opening area of ​​the second branch hole 12 and the third branch hole 13, and the surrounding surface thereof is a double-layer coating. The notch bracket 3 is placed in the interlayer gap of the double-layer coating, and the two end faces of the notch bracket 3 are fitted to sew the two layers of coating together with sutures, so that the notch bracket 3 is located in the interlayer space of the double-layer coating and can only rotate but not move. The notch bracket 3 is limited, and after the outer coating is opened, the notch of the notch can be moved to the opening position by tools such as tweezers, and then a hole is opened in the inner coating. After the hole is opened, the bracket is sutured to the edge of the hole to fix the notch bracket 3.

[0075] This embodiment has the same beneficial effects as Embodiment 1.

[0076] Example 3

[0077] like Fig.13 As shown, this embodiment introduces a personalized thoracic aortic stent system, which is basically the same as the personalized thoracic aortic stent system introduced in Example 1. The difference is that the skeleton structure of this embodiment is a small wave stent 4, and multiple small wave stents 4 are slidably located in the interlayer gap of the double-layer coating.

[0078] The small wave bracket 4 can be moved axially. When making a hole, the bracket is placed on the side. After making the hole, the doctor can axially move and fix the position of the small wave bracket 4 so that it does not interfere with the hole position while ensuring a certain support.

[0079] This embodiment has the same beneficial effects as Embodiment 1.

[0080] Example 4

[0081] like Figure 14-15 As shown, this embodiment introduces a personalized thoracic aortic stent system, which is basically the same as the structure of the personalized thoracic aortic stent system introduced in Example 1. The difference is that the skeleton structure of this embodiment is a thin wave stent 5 with self-deformation, and multiple thin wave stents 5 are located in the interlayer gap of the double-layer coating, and the half side of the thin wave stent 5 facing away from the perforation area is sutured to the double-layer coating by sutures.

[0082] A longer thin wave stent 5 is used to cover the positions of the two branch holes. The non-opening half of the stent is sutured and fixed to the covering film, and the opening half is kept relaxed. After the doctor opens the hole, during the in vivo splicing process, the branch stent 7 enters the branch hole of the aortic arch stent 1 through the conveyor, and the relaxed stent is squeezed open by the self-expansion of the branch stent 7. This ensures that the metal stent does not block the intervention of the branch stent 7 and guarantees a certain support effect.

[0083] This embodiment has the same beneficial effects as Embodiment 1.

[0084] Example 5

[0085] like Fig.16 As shown, this embodiment introduces a personalized thoracic aortic stent system, which is basically the same in structure as the personalized thoracic aortic stent system introduced in Example 1. The difference is that the peripheral surface of the opening area of ​​the aortic arch stent 1 in this embodiment is a single-layer coating, and presents an artificial blood vessel-like corrugated structure 6.

[0086] The section where the second branch hole 12 and the third branch hole 13 are located adopts an artificial blood vessel-type corrugated structure 6, without the interference of a metal stent, and the opening position is free while having a certain degree of support.

[0087] This embodiment has the same beneficial effects as Embodiment 1.

[0088] Example 6

[0089] This embodiment introduces a personalized thoracic aorta stent system, which is basically the same in structure as the personalized thoracic aorta stent system introduced in Example 1. The difference is that the connecting ends of the brachiocephalic trunk branch stent 71, the left common carotid branch stent 72, and the left subclavian branch stent 73 in this embodiment gradually increase in diameter outward, forming a cone, and a double-layer brim is set on the end surface to form a double-layer brim structure. The double-layer brim structure includes a cone-shaped outer cap and an inner cap located inside the outer cap; the outer cap is continuously sutured to the inner wall of the connecting end of the branch stent 7 by sutures, and the inner cap is intermittently sutured to the inner wall of the connecting end of the branch stent 7 by sutures.

[0090] The double-brim structure has a taper that can fit the branch artery circular hole on the aortic arch stent 1 to the maximum extent. Since the sutures between the double-layer brims are sparse and there are interlayer gaps, blood will infiltrate and coagulate after splicing, causing the interlayer to bulge and the sealing of the interface to be reinforced for the second time.

[0091] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A personalized thoracic aortic stent system, characterized in that: It comprises an aortic arch stent (1) and an ascending aorta stent (2); the anchoring region of the aortic arch stent (1) is spliced ​​and implanted into the ascending aorta stent (2), and the anchoring region of the ascending aorta stent (2) serves as the anchoring region of the entire stent system; A first branch hole (11) is pre-opened in an area on the aortic arch stent (1) for connecting a branch stent (7), and an opening area of ​​a second branch hole (12) and a third branch hole (13) is locked with the first branch hole (11) as a reference point, and the second branch hole (12) and the third branch hole (13) are opened in the opening area; the opening area of ​​the aortic arch stent (1) is provided with a movable or deformable or irregular skeleton structure.

2. The personalized thoracic aortic stent system according to claim 1, characterized in that: The skeleton structure comprises a positioning bracket (81) and an irregularly wavy special-shaped bracket (82); the positioning bracket (81) is arranged around the first branch hole (11), and the special-shaped bracket (82) is arranged around the second branch hole (12) and the third branch hole (13).

3. The personalized thoracic aortic stent system according to claim 1, characterized in that: The peripheral surface of the opening area of ​​the aortic arch stent (1) is covered with a double layer of film, and the skeleton structure is located in the interlayer gap of the double layer of film.

4. The personalized thoracic aortic stent system according to claim 3, characterized in that: The skeleton structure is a notched bracket (3), which is annular as a whole, and has a notch on one side of the notched bracket (3) adapted to the opening area; the double-layer coating is sewn along its circumference to form an interlayer space adapted to the notched bracket (3), and the notched bracket (3) can be rotatably located in the interlayer space.

5. The personalized thoracic aortic stent system according to claim 3, characterized in that: The skeleton structure is a small wave support (4), and a plurality of small wave supports (4) are slidably located in the interlayer gap of the double-layer coating.

6. The personalized thoracic aortic stent system according to claim 3, characterized in that: The skeleton structure is a thin wave support (5) with self-deformation, and a plurality of thin wave supports (5) are located in the interlayer gap of the double-layer coating. The half side of the thin wave support (5) away from the opening area is sutured to the double-layer coating by sutures.

7. The personalized thoracic aortic stent system according to claim 1, characterized in that: The peripheral surface of the opening area of ​​the aortic arch stent (1) is covered with a single layer of film and presents an artificial blood vessel-like corrugated structure (6).

8. The personalized thoracic aortic stent system according to claim 1, characterized in that: The first branch hole (11), the second branch hole (12), and the third branch hole (13) on the aortic arch stent (1) are connected to branch stents (7) correspondingly; the branch stent (7) comprises a brachiocephalic trunk branch stent (71), a left carotid common branch stent (72), and a left subclavian branch stent (73) corresponding one to one to the first branch hole (11), the second branch hole (12), and the third branch hole (13); the brachiocephalic trunk branch stent (71), the left carotid common branch stent (72), and the left subclavian branch stent (73) all comprise a coating and a branch skeleton arranged on the coating; The coating comprises a straight-tube coating (701), a straight-tube folded coating (702) arranged on one end surface of the straight-tube coating (701), and a semi-wrapped coating (703) wrapped on the outer surface of the straight-tube coating (701); The branch skeleton comprises a wave support (704), a sealing support (705) and an inverted support (706); the sealing support (705) is located on the inner side of one end of the straight-tube coating (701) close to the straight-tube folded coating (702), and the wave support (704) is evenly distributed on other parts of the inner side of the straight-tube coating (701); the inverted support (706) is arranged at the connection between the straight-tube coating (701) and the straight-tube folded coating (702), and cooperates with the straight-tube folded coating (702) to seal the gap at the splicing part with the aortic arch stent (1).

9. The personalized thoracic aortic stent system according to claim 8, characterized in that: The inverted bracket (706) comprises a vertical portion and an inclined portion; the vertical portion extends from the connection between the straight-tube coating (701) and the straight-tube folded coating (702) to the inner side of the straight-tube coating (701) and fits with the sealing bracket (705); the inclined portion is connected to the vertical portion, and the connection between the two forms an inverted angle, and the inclined portion is closely attached to the outer side of the straight-tube folded coating (702) and extends obliquely upward.

10. The personalized thoracic aortic stent system according to claim 8, characterized in that: The two sides of the semi-wrapped coating (703) are in a staggered sawtooth shape, and the two sides of the semi-wrapped coating (703) are butted against the reversely wrapped straight-tube coating (701) to reduce the diameter of the branch stent (7).

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