Main-iliac artery external branch integrated stent

Abstract

The utility model discloses a main-iliac artery external branch integrated stent which comprises an abdominal aorta stent section, an iliac artery stent long leg integrated with the abdominal aorta stent section and an iliac artery stent short leg fixed in the abdominal aorta stent, and a bare stent is arranged at the near end of the abdominal aorta stent section. The surfaces of the aorta abdominalis stent section, the iliac artery stent long leg and the iliac artery stent short leg are all covered with films, and the iliac artery stent comprises a common iliac artery stent section, an external iliac artery stent section and an internal iliac artery external branch section, wherein the external iliac artery stent section and the internal iliac artery external branch section are communicated with the common iliac artery stent section. The external iliac artery stent has the advantages that the common iliac artery stent section is connected with the aorta abdominalis stent, the aorta abdominalis stent is effectively anchored to the inner wall of the aorta abdominalis through the near-end bare stent area, stent displacement is prevented, the near-end film covering part and the far end of the external iliac artery stent section are effectively attached to the blood vessel wall, internal leakage is prevented, and the stent is safe and reliable. Meanwhile, the internal iliac artery can be effectively reconstructed, so that the difficulty of a stent production technology and the consumption cost of materials are reduced, and the economic pressure of a patient is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an aorta-iliac artery external branch integrated stent. Background Art

[0002] Isolated iliac artery aneurysms account for 2% to 7% of all abdominal aneurysm diseases. Endovascular treatment has become an attractive alternative to open surgery, especially for elderly patients with multiple diseases. It has been proven to be safe and effective, with good mid-term results. For aneurysms involving the bifurcation of the abdominal aorta or less than 1.5 cm near the bifurcation of the abdominal aorta, extending or exceeding the ipsilateral internal iliac artery, embolization of the ipsilateral internal iliac artery is often required, and then a standard bifurcated aortic stent is used to isolate the aneurysm cavity, and the stent is extended to the external iliac artery.

[0003] At present, for aneurysms involving the bifurcation of the abdominal aorta or less than 1.5 cm near the bifurcation of the abdominal aorta, extending or exceeding the ipsilateral internal iliac artery, embolization of the ipsilateral internal iliac artery is often required, and then a standard bifurcated aortic stent is used to isolate the aneurysm cavity, and the stent is extended to the external iliac artery. For such lesions, in addition to the use of standard bifurcated aortic stents, independent iliac artery stents are also required. For cases requiring internal iliac artery embolization, coil embolization is required, and for cases requiring retention of the internal iliac artery, an iliac artery branch stent is required. This method has the disadvantages of complex surgical procedures, many surgical consumables, and high costs. In addition, the positioning requirements for the opening of the internal iliac artery branch are high, which increases the possibility of failure of internal iliac artery reconstruction due to inaccurate positioning. For this reason, we provide an external iliac artery branch stent to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an aortoiliac artery external branch integrated stent.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] An integrated aorta-iliac artery external branch stent comprises an abdominal aorta stent segment, an iliac artery stent long leg integrated with the abdominal aorta stent segment, and an iliac artery stent short leg fixed in the abdominal aorta stent, a bare stent is arranged at the proximal end of the abdominal aorta stent segment, and the surfaces of the abdominal aorta stent segment, the iliac artery stent long leg, and the iliac artery stent short leg are all provided with a coating, the iliac artery stent comprises an iliac artery stent segment, an external iliac artery stent segment connected thereto, and an internal iliac artery external branch segment, the external iliac artery branch segment connected thereto is arranged on the outer side of the common iliac artery stent segment away from the internal iliac artery opening, and the internal iliac artery external branch segment surrounds the external iliac artery stent segment so that the distal end of the internal iliac artery external branch segment faces the internal iliac artery opening.

[0007] Preferably, the proximal end of the long leg of the iliac artery stent is in contact with the proximal end of the short leg of the iliac artery stent, and the angle α between the long leg of the iliac artery stent and the short leg of the iliac artery stent is 5° to 15°.

[0008] Preferably, the bare stent provided at the proximal end of the abdominal aorta stent segment is annular wavy in shape.

[0009] Preferably, two first marking points for visualization are symmetrically arranged at the proximal end of the common iliac artery stent segment.

[0010] Preferably, four second marking points for visualization are evenly spaced and circumferentially arranged at the proximal end of the internal iliac artery branch segment.

[0011] Preferably, two third marking points for visualization are symmetrically arranged at the distal end of the external branch segment of the internal iliac artery.

[0012] Preferably, two fourth marking points for visualization are symmetrically arranged at the distal end of the external iliac artery stent segment.

[0013] Preferably, two fifth marking points and six marking points for visualization are symmetrically arranged at the proximal end and the distal end of the short leg of the iliac artery stent, respectively.

[0014] The utility model has the following advantages:

[0015] 1. The utility model connects the abdominal aorta stent through the common iliac artery stent segment. The abdominal aorta stent is effectively anchored to the inner wall of the abdominal aorta through the proximal bare stent area to prevent the stent from shifting. The proximal covered part and the distal end of the external iliac artery stent segment are effectively attached to the blood vessel wall to prevent internal leakage. At the same time, the internal iliac artery can be effectively reconstructed. For isolated common iliac artery aneurysm, the abdominal aorta stent does not need to fully reconstruct the infrarenal abdominal aorta. It only needs to provide an effective anchoring area above the bifurcation of the abdominal aorta, thereby reducing the technical difficulty of stent production and the material consumption cost, greatly reducing the economic pressure on patients; and the external branch segment of the internal iliac artery surrounds the external iliac artery stent segment so that the distal end of the internal iliac artery branch opens toward the internal iliac artery, and the external branch segment of the internal iliac artery can move at a certain angle or position with the stent as a whole, thereby reducing the requirement for the positioning accuracy of the distal end of the external branch segment of the internal iliac artery.

[0016] 2. The utility model uses a ring-shaped wavy bare stent to fit and anchor the abdominal aorta stent to the inner wall of the blood vessel to prevent the stent from shifting.

[0017] 3. The utility model uses multiple marking points such as the first marking point and the second marking point, so that the position of each component in the body can be accurately observed during surgery and the position can be displayed, thereby facilitating surgical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the overall structure of the bracket of the utility model.

[0019] Figure 2 This is a schematic diagram of the stent of the present invention installed in a blood vessel.

[0020] Figure 3 It is a schematic diagram of reconstruction of the internal iliac artery on one side and reconstruction of the common iliac artery on the other side when the stent of the utility model is placed in a blood vessel.

[0021] In the figure, 1. abdominal aorta stent segment; 2. common iliac artery stent segment; 3. external iliac artery stent segment; 4. iliac artery stent short leg; 5. internal iliac artery stent outer branch segment; 6. bare stent; 7. first marking point; 8. second marking point; 9. third marking point; 10. fourth marking point; 11. fifth marking point; 12. sixth marking point; 13. abdominal aorta; 14. common iliac artery; 15. external iliac artery; 16. internal iliac artery; 17. common iliac artery aneurysm. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 and Figure 2 The embodiment shown.

[0025] An integrated aorta-iliac artery external branch stent comprises an abdominal aorta stent segment, an iliac artery stent long leg integrated with the abdominal aorta stent segment, and an iliac artery stent short leg fixed in the abdominal aorta stent, a bare stent is arranged at the proximal end of the abdominal aorta stent segment, and the surfaces of the abdominal aorta stent segment, the iliac artery stent long leg, and the iliac artery stent short leg are all provided with a coating, the iliac artery stent comprises an iliac artery stent segment, an external iliac artery stent segment connected thereto, and an internal iliac artery external branch segment, the external iliac artery branch segment connected thereto is arranged on the outer side of the common iliac artery stent segment away from the internal iliac artery opening, and the internal iliac artery external branch segment surrounds the external iliac artery stent segment so that the distal end of the internal iliac artery external branch segment faces the internal iliac artery opening.

[0026] See also Figure 1 As shown, the common iliac artery stent segment 2 is connected to the abdominal aorta stent 1, and the proximal end of the abdominal aorta stent 1 is anchored to the inner wall of the abdominal aorta 13 through a bare stent 6 to prevent the stent from shifting. The abdominal aorta stent segment 1 and the iliac artery stent long leg 2 and the iliac artery stent short leg 4 are provided with a coating (not shown in the figure) on the surface to effectively isolate the blood flow. For the isolation of the common iliac artery aneurysm 17, the entire infrarenal abdominal aorta 13 does not need to be constructed. It is only necessary to provide an effective anchoring area for the common iliac artery stent segment 2, that is, only a partial length of the abdominal aorta stent segment 1 is needed, that is, the length of the abdominal aorta stent segment 1 is less than the length of the infrarenal abdominal aorta 13. Compared with the existing standard abdominal aorta stent 1, the length of the abdominal aorta stent 1 is reduced, the manufacturing cost is reduced, and the medical economic pressure on the patient is effectively reduced.

[0027] In addition, the external branch segment 5 of the internal iliac artery is wound around the external iliac artery stent segment 3 so that the distal end of the external branch segment 5 opens toward the internal iliac artery 16. The external branch segment 5 of the internal iliac artery can move at a certain angle or position along with the stent as a whole, thereby reducing the requirement for the positioning accuracy of the distal end of the external branch segment 5 of the internal iliac artery. In the subsequent internal iliac artery branch stent that enters the internal iliac artery 16 through the bridge of the external branch segment 5 of the internal iliac artery, the external branch segment 5 of the internal iliac artery can move at a certain angle or position at the distal end of the external branch segment 5 of the internal iliac artery, thereby being able to enter the internal iliac artery 16, thereby reducing the requirement for positioning accuracy during surgery.

[0028] It should be noted here that the surfaces of the long leg of the iliac artery stent and the short leg 4 of the iliac artery stent are both coated. Specifically, it can be understood that the surfaces of the common iliac artery stent segment 2, the external iliac artery stent segment 3, and the internal iliac artery branch segment 5 in the long leg of the iliac artery stent are all coated, so that their surfaces can fit with the inner wall of the blood vessel, reconstruct the blood vessel, and isolate the common iliac artery aneurysm 17.

[0029] See also Figure 2As shown, the common iliac artery aneurysm 17 is located in the common iliac artery 14. If only the common iliac artery stent segment 2 is implanted, the anchoring area at the proximal end of the common iliac artery stent segment 2 is short, and there is a risk of internal leakage due to insufficient anchoring area. Therefore, the common iliac artery stent segment 2 is connected to the abdominal aorta stent 1, thereby reducing the risk of internal leakage at the common iliac artery stent segment 2.

[0030] After the common iliac artery stent segment 2 is inserted into the common iliac artery 14, the common iliac artery aneurysm 17 is isolated from the blood flow, thereby achieving the treatment effect; when the internal iliac artery 16 needs to be bridged and reconstructed, the internal iliac artery stent (not shown) can be passed through the distal end of the internal iliac artery external branch segment 5 toward the opening of the internal iliac artery 16 for bridge reconstruction. During the bridging and reconstruction process, the external iliac artery branch segment 5 can move at a certain angle or position, thereby reducing the positioning accuracy requirement of the distal end of the internal iliac artery branch segment 5.

[0031] After the reconstruction is completed, the proximal end of the abdominal aorta stent and the distal end of the external iliac artery stent segment 2 can be expanded by a balloon, so that they are closely attached to the inner wall of the blood vessel and the occurrence of internal leakage is reduced.

[0032] The proximal end of the long leg of the iliac artery stent is fitted with the proximal end of the short leg 4 of the iliac artery stent, and the angle α between the long leg of the iliac artery stent and the short leg of the iliac artery stent is 5° to 15°.

[0033] In this embodiment, the angle between the long leg of the iliac artery stent and the short leg 4 of the iliac artery stent is 10°. Other angles can be selected as needed, and there is no specific limitation on the angle.

[0034] The bare stent 6 arranged at the proximal end of the abdominal aortic stent segment 1 is annular wavy in shape; in the present embodiment, the bare stent 6 is made of a metal material that can be implanted in the human body, and can adhere closely to the blood vessel after expansion, so that the abdominal aortic stent segment 1 is firmly anchored to the inner wall of the blood vessel to prevent the stent from shifting.

[0035] Two first marking points 7 for visualization are symmetrically arranged at the proximal end of the common iliac artery stent segment 2; Figure 1 and Figure 2 As shown, in this embodiment, two first marking points 7 are located at 3 o'clock and 9 o'clock at the proximal end of the common iliac artery stent segment 2, and the angle between two adjacent first marking points 7 is 180°.

[0036] Four second marking points 8 for visualization are evenly spaced and arranged at the proximal end of the external branch segment 5 of the internal iliac artery; Figure 1 and Figure 2 As shown, the four second marking points 8 are respectively located at 3 o'clock, 6 o'clock, 9 o'clock and 12 o'clock, and the angle between two adjacent second marking points 8 is 90°.

[0037] Two third marking points 9 for visualization are symmetrically arranged at the distal end of the external branch segment 5 of the internal iliac artery; Figure 1 and Figure 2 As shown, two third marking points 9 are located at the distal end of the external branch 5 of the internal iliac artery, and the two third marking points 9 are respectively located at the 3 o'clock and 9 o'clock positions, and the angle between two adjacent third marking points 9 is 180°.

[0038] Two fourth marking points 10 for imaging are symmetrically arranged at the distal end of the external iliac artery stent segment 3. Figure 1 and Figure 2 As shown, the two fourth marking points 10 are respectively located at the 3 o'clock and 9 o'clock positions at the distal end of the external iliac artery stent segment 3, and the angle between two adjacent fourth marking points 10 is 180°.

[0039] The proximal and distal ends of the short leg 4 of the iliac artery stent are symmetrically provided with two fifth marking points 11 and sixth marking points 12 for imaging; Figure 1 and Figure 2 As shown, the two fifth marking points 11 are located at 3 o'clock and 9 o'clock positions at the proximal end of the short leg 4 of the iliac artery stent, and the two sixth marking points 12 are located at 3 o'clock and 9 o'clock positions at the distal end of the short leg 4 of the iliac artery stent.

[0040] In this embodiment, each of the above-mentioned marking points can be developed under X-ray fluoroscopy to determine the corresponding specific position.

[0041] The use process of the utility model is as follows: first, the abdominal aorta stent 1, the common iliac artery stent segment 2, the iliac artery stent short leg 4, the external iliac artery stent segment 3 and the internal iliac artery branch segment 5 are inserted into the blood vessel, and the above-mentioned stents are respectively positioned in the corresponding blood vessel channels and released. Specifically, the internal iliac artery stent that needs to be inserted into the internal iliac artery 16 is then inserted into the internal iliac artery 16 through the channel formed by the abdominal aorta stent 1, the common iliac artery stent segment 2, and the internal iliac artery branch segment 5. Finally, the proximal end of the abdominal aorta stent segment 1 and the distal end of the external iliac artery stent segment 3 are expanded by a balloon to make them fit tightly to the blood vessel to complete the insertion of the stent. Finally, after the stent of this patent is implanted, the iliac artery on the other side needs to be reconstructed, and another independent iliac artery stent of suitable length is implanted, with the proximal end bridging the iliac artery short leg 4 and the distal end positioned above the opening of the internal iliac artery on the other side, as shown in the figure. Figure 3 As shown (or after embolization of the internal iliac artery, the iliac artery stent completely covers the internal iliac artery).

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated stent for the external branches of the aorta and iliac arteries, characterized in that: It includes an abdominal aorta stent segment, an iliac artery stent long leg integrated with the abdominal aorta stent segment, and an iliac artery stent short leg fixed in the abdominal aorta stent. A bare stent is arranged at the proximal end of the abdominal aorta stent segment. The surfaces of the abdominal aorta stent segment, the long leg of the iliac artery stent, and the short leg of the iliac artery stent are all provided with a coating. The iliac artery stent includes a common iliac artery stent segment, an external iliac artery stent segment connected thereto, and an internal iliac artery external branch segment. The outer side of the common iliac artery stent segment away from the internal iliac artery opening is provided with an internal iliac artery external branch segment connected thereto. The internal iliac artery external branch segment surrounds the external iliac artery stent segment so that the distal end of the internal iliac artery external branch segment faces the internal iliac artery opening.

2. The aorta-iliac artery external branch integrated stent according to claim 1, characterized in that: The proximal end of the long leg of the iliac artery stent is fitted with the proximal end of the short leg of the iliac artery stent, and the angle α between the long leg of the iliac artery stent and the short leg of the iliac artery stent is 5° to 15°.

3. The aorta-iliac artery external branch integrated stent according to claim 1, characterized in that: The bare stent arranged at the proximal end of the abdominal aorta stent segment is in an annular wavy shape.

4. The aorta-iliac artery external branch integrated stent according to claim 1, characterized in that: Two first marking points for visualization are symmetrically arranged at the proximal end of the common iliac artery stent segment.

5. The aorta-iliac artery external branch integrated stent according to claim 1, characterized in that: Four second marking points for visualization are evenly spaced and arranged at the circumference of the proximal end of the internal iliac artery branch segment.

6. The aorta-iliac artery external branch integrated stent according to claim 1, characterized in that: Two third marking points for visualization are symmetrically arranged at the distal end of the external branch segment of the internal iliac artery.

7. The aorta-iliac artery external branch integrated stent according to claim 1, characterized in that: Two fourth marking points for visualization are symmetrically arranged at the distal end of the external iliac artery stent segment.

8. The aorta-iliac artery external branch integrated stent according to claim 1, characterized in that: Two fifth marking points and a sixth marking point for visualization are symmetrically arranged at the proximal end and the distal end of the short leg of the iliac artery stent, respectively.

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