Main-iliac artery internal branch integrated stent
By designing the integrated stent of the main-iliac artery branch, the friction and internal leakage of the internal iliac artery stent in the existing technology is solved, the risk of thrombosis shedding and surgical cost is reduced, and safer and more economical treatment of iliac aneurysms is achieved. Effect.
Patent Information
- Application Number
- CN202420698814.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In the treatment of iliac aneurysms, the surgical process is complicated and there are many consumables. The insertion of the internal iliac artery stent is prone to friction with the inner wall of the blood vessel, resulting in a high risk of thrombosis. The insufficient length of the standard stent leads to internal leakage, which increases the cost of surgery and The patient is financially stressed.
Design an integrated stent of the main-iliac artery branch, including the abdominal aortic stent segment and the iliac artery stent long and short legs. The internal iliac artery branch segment is set in the common iliac artery stent segment and is made of metal annular The wavy bare stent is anchored to the inner wall of the vessel, reducing the risk of friction and internal leakage, and reducing costs by shortening the length of the abdominal aortic stent.
It effectively reduces the friction risk between the branch segments of the internal iliac artery and the inner wall of the blood vessel, reduces the risk of thrombosis, provides sufficient anchorage area to reduce internal leakage, and reduces surgical consumables and patients' economic pressure.
Smart Images
Figure CN222195056U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical instruments, in particular to an aorta-iliac artery internal 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] For this type of lesion, in addition to the use of standard abdominal aortic bifurcation stents, independent iliac artery stents are also required. For cases where internal iliac artery embolization is required, spring coil embolization is required, and for cases where the internal iliac artery needs to be retained, iliac artery branch stents are required. This method has defects such as complex surgical procedures, many surgical consumables, and high costs. Some existing external branch iliac artery branch stents are prone to friction with the inner wall of the blood vessel during implantation, which may damage the blood vessel and cause the risk of detachment of mural thrombus. For this reason, we provide an aorta-iliac artery internal branch integrated stent to solve the above problems. Utility Model Content
[0004] The utility model aims to overcome the shortcomings of the prior art and provide an aorta-iliac artery internal branch integrated stent.
[0005] The purpose of the utility model is achieved through the following technical solutions:
[0006] An integrated stent for internal branches of the aorta and iliac arteries 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, the outer surfaces of the abdominal aorta stent, the iliac artery stent long leg and the iliac artery stent short leg are all provided with a coating, the iliac artery stent long leg comprises an iliac artery stent segment inserted into the common iliac artery, an external iliac artery stent segment inserted into the external iliac artery, and an internal iliac artery branch segment which are interconnected, the internal iliac artery branch segment is fixed to the inner wall of the lumen of the common iliac artery stent segment away from the opening direction of the internal iliac artery, and the distal end of the internal iliac artery branch segment extends to the outer surface of the common iliac artery stent segment close to the opening direction of the internal iliac artery and faces the opening direction of the internal iliac artery.
[0007] Preferably, an annular wavy bare stent made of metal that can be implanted into the human body is provided at the proximal end of the abdominal aorta stent segment.
[0008] Preferably, the length of the abdominal aorta stent segment is shorter than the length of the abdominal aorta.
[0009] Preferably, the long leg of the iliac artery stent and the short leg of the iliac artery stent are partially fitted together, and an angle α formed by the bifurcation between the two is 5° to 15°.
[0010] Preferably, two first marking points are symmetrically arranged at the proximal end of the common iliac artery stent segment.
[0011] Preferably, two second marking points and two third marking points are symmetrically arranged at the proximal end and the distal end of the short leg of the iliac artery stent, respectively.
[0012] Preferably, four fourth marking points are evenly spaced apart from each other on the circumference of the proximal end of the internal iliac artery branch segment.
[0013] Preferably, two fifth marking points are symmetrically arranged at the distal end of the internal iliac artery branch segment.
[0014] Preferably, two sixth marking points are symmetrically arranged at the distal end of the external iliac artery stent segment.
[0015] The utility model has the following advantages:
[0016] 1. The utility model arranges the internal iliac artery branch segment in the inner cavity of the common iliac artery stent segment, so that the internal iliac artery branch segment does not touch or rub against the inner wall of the blood vessel during implantation, thereby reducing the risk of thrombus falling off the inner wall of the blood vessel compared with the existing external branch of the internal iliac artery.
[0017] 2. The utility model arranges an annular wavy bare stent made of metal at the proximal end of the abdominal aortic stent, and the annular wavy bare stent can be used to fully anchor and attach the abdominal aortic stent to the inner wall of the blood vessel, so that the coating on the outer surface of the abdominal aortic stent can be closely attached to the inner wall of the blood vessel to prevent the occurrence of internal leakage.
[0018] 3. The utility model reduces the need for the length of the abdominal aortic stent by making the length of the abdominal aorta stent shorter than that of the abdominal aorta, while satisfying the required anchoring area, thereby reducing the cost of consumables in the entire operation and reducing the financial pressure on patients. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the main bracket of the utility model.
[0020] Figure 2 This is a schematic diagram of the state of the total stent of the utility model being placed inside a blood vessel.
[0021] Figure 3It is a schematic diagram of the state in which the main stent, the internal iliac artery stent and the other iliac artery stent of the utility model are implanted in the human body.
[0022] In the figure, 1. abdominal aorta stent segment; 2. common iliac artery stent segment; 3. external iliac artery stent segment; 4. internal iliac artery branch segment; 5. iliac artery stent short leg; 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. iliac artery aneurysm. DETAILED DESCRIPTION
[0023] 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.
[0024] 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.
[0025] like Figure 1 — Figure 3 The embodiment shown.
[0026] An integrated aorta-iliac artery internal branching 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. The outer surfaces of the abdominal aorta stent 1, the iliac artery stent long leg, and the iliac artery stent short leg 5 are all provided with a coating. The iliac artery stent long leg comprises an iliac artery stent segment 2 inserted into the common iliac artery 14, an external iliac artery stent segment 3 inserted into the external iliac artery 15, and an internal iliac artery internal branch segment 4, which are interconnected. The internal iliac artery internal branch segment 4 is fixed to the inner wall of the lumen of the common iliac artery stent segment 2 away from the opening direction of the internal iliac artery 16. The distal end of the internal iliac artery internal branch segment 4 extends to the outer surface of the common iliac artery stent segment 2 close to the opening direction of the internal iliac artery 16 and faces the opening direction of the internal iliac artery 16.
[0027] See also Figure 1 and Figure 2 As shown, by setting the internal iliac artery branch segment 4 inside the common iliac artery stent segment 2, the internal iliac artery branch segment 4 does not come into contact and friction with the inner wall of the blood vessel during implantation, thereby reducing the risk of thrombus falling off the inner wall of the blood vessel and ensuring the safety of the operation to a certain extent.
[0028] It should be noted that the surface of the long leg of the iliac artery stent is provided with a coating, which can be understood as the surfaces of the common iliac artery stent segment 2, the external iliac artery stent segment 3 and the internal iliac artery inner branch segment 4 included in the long leg of the iliac artery stent are all provided with a coating. The coating enables the surface to better fit the blood vessel wall; some existing treatment methods are to directly insert the common iliac artery stent segment 2 into the common iliac artery 14. Since the distance between the aneurysm cavity of the iliac artery aneurysm 17 and the abdominal aorta 13 is relatively short, the anchoring area provided for the common iliac artery stent segment 2 in this area is also relatively small, which can easily cause internal leakage due to insufficient anchoring area. The present application provides sufficient anchoring area for the common iliac artery stent segment 2 by connecting a partial length of the abdominal aorta stent 1 with the common iliac artery stent segment 2. Compared with the existing ones, the structure of the application has a larger anchoring area, thereby reducing the risk of internal leakage.
[0029] See also Figure 2 As shown, the iliac artery aneurysm 17 at the inner wall of the common iliac artery 14 is isolated by the common iliac artery stent segment 2, thereby achieving a therapeutic effect.
[0030] An annular wavy bare stent 6 made of metal that can be implanted into the human body is arranged at the proximal end of the abdominal aorta stent segment 1 .
[0031] See also Figure 1 As shown, by setting the bare stent 6 at the proximal end of the abdominal aortic stent 1, it can be closely attached to the inner wall of the abdominal aorta 13, and drive the coating on the outer surface of the abdominal aortic stent 1 to also be closely attached to the inner wall of the blood vessel, providing sufficient anchoring area for the abdominal aortic stent 1 and the common iliac artery stent segment 2, thereby reducing the occurrence of internal leakage.
[0032] The length of the abdominal aorta stent segment 1 is less than the length of the abdominal aorta 13; Figure 2 As shown, the length of the abdominal aortic stent 1 is less than that of the abdominal aorta 13. Since there is no aneurysm in the abdominal aorta 13, there is no need to treat the abdominal aorta 13. In the present application, the abdominal aortic stent 1 is mainly used to provide sufficient anchoring force for the common iliac artery stent segment 2 to prevent internal leakage due to insufficient anchoring force. Therefore, only a partial length of the abdominal aortic stent 1 is required, thereby reducing the cost of surgery and patients.
[0033] The long leg of the iliac artery stent is partially fitted with the short leg 5 of the iliac artery stent, and the angle α formed by the bifurcation between the two is 5°~15°; in this embodiment, the angle between the long leg of the iliac artery stent and the short leg 5 of the iliac artery stent is 10°. In other embodiments, the angle can be selectively set as needed, and no specific limitation is made here.
[0034] Two first marking points 7 are symmetrically arranged at the proximal end of the common iliac artery stent segment 2; the position of the common iliac artery stent segment 2 is identified by the first marking points 7, and the two first marking points 7 are located at 3 o'clock and 9 o'clock positions at the proximal end of the common iliac artery stent segment 2.
[0035] Two second marking points 8 and two third marking points 9 are symmetrically arranged at the proximal end and the distal end of the short leg 5 of the iliac artery stent, respectively; the proximal end and the distal end of the short leg 5 of the iliac artery stent are positioned by the second marking points 8 and the third marking points 9, specifically, at the 3 o'clock direction and 9 o'clock direction of the proximal end and the distal end of the short leg 5 of the iliac artery stent, respectively.
[0036] Four fourth marking points 10 are evenly spaced at the circumference of the proximal end of the internal iliac artery branch segment 4; the proximal end of the internal iliac artery branch segment 4 can be accurately located through the four fourth marking points 10. Specifically, the four fourth marking points 10 are respectively located at 3 o'clock, 6 o'clock, 9 o'clock and 12 o'clock.
[0037] Two fifth marking points 11 are symmetrically arranged at the distal end of the internal iliac artery branch segment 4 ; the two fifth marking points 11 are located at the 3 o'clock and 9 o'clock positions at the proximal end of the internal iliac artery branch segment 4 .
[0038] Two sixth marking points 12 are symmetrically arranged at the distal end of the external iliac artery stent segment 3 ; the two sixth marking points 12 are located at the 3 o'clock and 9 o'clock positions at the distal end of the external iliac artery stent segment 3 .
[0039] The above-mentioned marking points can be developed under X-ray fluoroscopy to determine the corresponding specific positions.
[0040] The use process of the utility model is as follows: first, the abdominal aorta stent 1 is inserted into the abdominal aorta 13, and the common iliac artery stent segment 2 and the external iliac artery stent segment 3 are respectively inserted into the common iliac artery 14 and the external iliac artery 15, and the iliac artery aneurysm 17 is separated by the common iliac artery stent segment 2 to achieve the treatment effect. During the insertion process, the distal end of the internal iliac artery branch segment 4 is directed toward the proximal end of the internal iliac artery 16; when the internal iliac artery 16 needs to be reconstructed and an internal iliac artery stent is inserted, the internal iliac artery stent is 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 4 to complete the insertion; after the stent of the present application is inserted, the iliac artery on the other side also needs to be reconstructed and an iliac artery stent is inserted, and the proximal end of the inserted iliac artery stent on the other side is bridged to the iliac artery short leg 4, and the distal end is positioned above the opening of the internal iliac artery. For details, please refer to Figure 3 shown.
[0041] 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 internal branches of the aorta and iliac arteries, Features: 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. The outer 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 long leg includes an iliac artery stent segment inserted into the common iliac artery, an external iliac artery stent segment inserted into the external iliac artery, and an internal iliac artery branch segment that are interconnected. The internal iliac artery branch segment is fixed to the inner wall of the lumen of the common iliac artery stent segment away from the opening direction of the internal iliac artery. The distal end of the internal iliac artery branch segment extends to the outer surface of the common iliac artery stent segment close to the opening direction of the internal iliac artery and faces the opening direction of the internal iliac artery.
2. The aorta-iliac artery branch integrated stent according to claim 1, Features: An annular wavy bare stent made of metal that can be placed in the human body is arranged at the proximal end of the abdominal aorta stent segment.
3. The aorta-iliac artery branch integrated stent according to claim 1, Features: The length of the abdominal aorta stent segment is shorter than the length of the abdominal aorta.
4. The aorta-iliac artery branch integrated stent according to claim 1, Features: The long leg of the iliac artery stent is partially fitted with the short leg of the iliac artery stent, and the angle α formed by the bifurcation between the two is 5° to 15°.
5. The aorta-iliac artery branch integrated stent according to claim 1, Features: Two first marking points are symmetrically arranged at the proximal end of the common iliac artery stent segment.
6. The aorta-iliac artery branch integrated stent according to claim 1, Features: Two second marking points and two third marking points are symmetrically arranged at the proximal end and the distal end of the short leg of the iliac artery stent.
7. The aorta-iliac artery branch integrated stent according to claim 1, Features: Four fourth marking points are evenly spaced around the proximal end of the internal iliac artery branch segment.
8. The aortoiliac artery branch integrated stent according to claim 1, Features: Two fifth marking points are symmetrically arranged at the distal end of the internal iliac artery branch segment.
9. The aorta-iliac artery branch integrated stent according to claim 1, Features: Two sixth marking points are symmetrically arranged at the distal end of the external iliac artery stent segment.