Abdominal aorta-iliac artery integrated stent
By designing a kind of abdominal aorta-iliac arterial integrated inner and external branch branches, the design of the separators of septum and abdominal aorta stent tube wall is used to solve the excessive remote size of the abdominal aorta during the release of the existing technology. The problem has achieved the complete development and difficulty of the bracket.
Patent Information
- Application Number
- CN202420699012.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In the prior art, when treating aneurysms at the bifurcation of the abdominal aorta and iliac artery, the stent can easily lead to the distal size of the abdominal aorta and cannot be fully deployed during the release process, which increases the difficulty and duration of the operation.
A kind of abdominal aorta-iliac arterial integrated inner and external branch branches are designed. By setting up a septum tablets in the abdominal aortic bracket, the fork is moved up to the abdominal aortic bracket to separate in advance to connect the long iconic arterial length, respectively. The legs and short leg branches are used to maintain the restriction of the wall of the abdominal aorta stent to prevent the remote size of the abdominal aorta.
The complete development of the distal end of the abdominal aortic bracket was achieved, and the problem of incompetence of wrinkles and size was avoided, reducing the difficulty and duration of surgery. At the same time, it provided sufficient anchoring area to overcome the disease that the lesions were accumulated and the aorta of the iliac arteries approached the abdominal aorta cubes. defect.
Smart Images
Figure CN222398556U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to an abdominal aorta-iliac artery integrated inner external branch 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.
[0003] At present, for lesions 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. The stent extends to the external iliac artery. The bifurcated aortic stent is usually composed of an elastic metal wire and a coating coated thereon. For such lesions, in addition to the use of a standard bifurcated abdominal aorta stent, an independent iliac artery stent is currently required. For cases where the internal iliac artery needs to be retained, an iliac artery branch stent is required. This method has a complicated surgical process. To solve the above problems, some stents integrating the abdominal aorta and iliac artery have appeared, including an abdominal aortic stent, a short leg branch of the iliac artery, and a long leg branch of the iliac artery. The long leg branch is also provided with an internal iliac artery segment. However, the stent still has some problems. The bifurcation is performed outside the distal end of the abdominal aorta. Since the stent is implanted and positioned from the proximal end of the abdominal aorta to the distal end after the abdominal aortic stent is positioned, The stent is released at the distal end. In order to ensure the smooth connection between the abdominal aortic stent and the iliac artery branch due to the external bifurcation, the part of the abdominal aortic stent close to the distal end will gradually expand, resulting in the cross-sectional area of the distal end of the abdominal aorta being larger than the cross-sectional area of the proximal end. If the diseased area is not in the infrarenal abdominal aorta, but at the connection with the iliac artery connected to it, this will cause the size of the distal end of the abdominal aorta of the stent to be much larger than the size of the human abdominal aorta, which will cause wrinkles at the bifurcation during the release process and cannot be fully expanded, resulting in a reduction in the flow cross-sectional area. These situations require repeated adjustments, which greatly increases the difficulty and duration of the operation. Utility Model Content
[0004] In order to solve the above problems, the purpose of the utility model is to provide an abdominal aorta-iliac artery integrated inner external branch stent.
[0005] The utility model is realized by the following method: an abdominal aorta-iliac artery integrated inner external branch stent, which is composed of an elastic metal wire stent that can be implanted in the human body and a coating coated on the elastic metal wire stent; it includes an abdominal aorta stent, and an iliac artery long leg branch and an iliac artery short leg branch that are integrated with the abdominal aorta stent and are arranged at the distal end of the abdominal aorta stent, the abdominal aorta stent is in a straight cylindrical shape, and a section near the distal end of the abdominal aorta stent is separated into a first outlet and a second outlet by a separation membrane composed of the elastic metal wire and the coating, the first outlet is connected to the proximal opening of the long leg branch of the iliac artery on the side away from the proximal end of the abdominal aorta stent, and the second outlet is connected to the proximal opening of the short leg branch of the iliac artery on the side away from the proximal end of the abdominal aorta stent.
[0006] Preferably, the proximal opening of the abdominal aorta stent has no coating, and is a wavy bare frame area formed by the metal wire stent.
[0007] Preferably, metal markers are provided at the proximal opening and distal opening of the short leg branch of the iliac artery, and the short leg branch of the iliac artery is used to reconstruct the common iliac artery on the healthy side; metal markers are provided at the proximal opening and distal opening of the long leg branch of the iliac artery, and the long leg branch of the iliac artery is used to reconstruct the common iliac artery on the affected side.
[0008] Preferably, two metal markers are provided at the proximal opening and the distal opening of the short leg branch of the iliac artery and the long leg branch of the iliac artery.
[0009] Preferably, the short leg branch of the iliac artery can be connected to an independent iliac artery stent matching its size.
[0010] Preferably, the length of the long leg branch of the iliac artery and the short leg branch of the iliac artery in parallel is 1.6-3.1 cm.
[0011] Preferably, the fitting point of the long leg branch of the iliac artery and the short leg branch of the iliac artery forms an angle a of 8°-12° with the long leg branch of the iliac artery at the distal end of the short leg branch of the iliac artery.
[0012] Preferably, the long leg of the iliac artery includes a common iliac artery segment, an internal iliac artery segment and an external iliac artery segment, the common iliac artery segment is a segment of the long leg of the iliac artery close to the abdominal aorta stent, the external iliac artery segment is a segment of the long leg of the iliac artery away from the abdominal aorta stent, and the internal iliac artery segment is connected to the inner side of the connection between the common iliac artery segment and the external iliac artery segment; metal markers are provided at the proximal opening and distal opening of the internal iliac artery segment.
[0013] Preferably, four metal markers are provided at the proximal opening of the internal iliac artery segment; and two metal markers are provided at the distal opening of the internal iliac artery segment.
[0014] The beneficial effects of the utility model are: the utility model provides an abdominal aorta-iliac artery integrated inner external branch stent, compared with the prior art, the utility model has at least the following technical effects:
[0015] 1. The bifurcation is moved up and arranged in the abdominal aorta stent and separated in advance to connect the long leg branch and the short leg branch of the iliac artery respectively. With the help of the limiting effect of the abdominal aorta stent wall to maintain a parallel state, the abdominal aorta can remain in a straight tube shape, so that the proximal opening and the distal opening are the same size, so that the distal end of the abdominal aorta stent avoids wrinkles and fully fits the vascular wall of the abdominal aorta after release, so as to avoid the problem of the existing technology that the bifurcation is too large to be fully expanded; it can be anchored with the abdominal aorta to overcome the defect of insufficient anchoring area caused by the lesion involving the iliac artery close to the bifurcation of the abdominal aorta.
[0016] 2. There is only a bare metal stent at the proximal end of the abdominal aortic stent (the side close to the kidney is the proximal end), which can increase its adhesion to the abdominal aorta wall and reduce the risk of stent displacement.
[0017] 3. Metal markers are provided at the corresponding proximal and distal openings of the stent, which can be visualized under X-ray fluoroscopy to provide identification for the guide wire to enter the corresponding branch or further bridge and lengthen the branch.
[0018] 4. Set the distal end of the short leg branch of the iliac artery to a certain angle with the long leg branch of the iliac artery to facilitate entry into the corresponding iliac artery after release and deployment, and avoid jamming caused by forced bending. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The present invention is a schematic diagram of the structure of an abdominal aorta-iliac artery integrated inner external branch stent.
[0020] Figure 2 The diagram is a schematic diagram of a state where an abdominal aorta-iliac artery integrated medial external branch stent is implanted in the abdominal aorta and iliac artery.
[0021] Figure 3 The diagram is a schematic diagram of the state of an abdominal aorta-iliac artery integrated inner external branch stent and another side iliac artery stent being implanted in a human body.
[0022] Explanation of the accompanying numbers: 1. Abdominal aorta stent; 11. First outlet; 12. Second outlet; 13. Bare stent area; 2. Long leg branch of iliac artery; 21. Common iliac artery segment; 22. Internal iliac artery segment; 23. External iliac artery segment; 3. Short leg branch of iliac artery; 4. Metal marker; 5. Independent iliac artery stent; 6. Abdominal aorta; 7. Iliac artery; 8. Internal iliac artery; 9. Iliac artery aneurysm. DETAILED DESCRIPTION
[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] See also Figures 1 to 3 , an abdominal aorta-iliac artery integrated inner external branch stent, composed of an elastic metal wire stent implantable in the human body and a coating coated on the elastic metal wire stent; comprising an abdominal aorta stent 1, and an iliac artery long leg branch 2 and an iliac artery short leg branch 3 which are integrated therewith and arranged at the distal end of the abdominal aorta stent 1, the abdominal aorta stent 1 is in the shape of a straight cylinder, and a section of the abdominal aorta stent 1 near the distal end is separated into a first outlet 11 and a second outlet 12 by a separating membrane composed of the elastic metal wire and the coating, the first outlet 11 is connected to the proximal opening of the iliac artery long leg branch 2 on the side away from the proximal end of the abdominal aorta stent 1, and the second outlet 12 is connected to the proximal opening of the iliac artery short leg branch 3 on the side away from the proximal end of the abdominal aorta stent 1. The bifurcation is moved up and set in the abdominal aorta stent 1 and separated in advance to connect the long leg branch 2 of the iliac artery and the short leg branch 3 of the iliac artery respectively, and is limited by the wall of the abdominal aorta stent 1 to maintain a parallel state, so that the abdominal aorta can maintain a straight tube shape, and the proximal opening and the distal opening are the same size, so that the distal end of the abdominal aorta stent 1 can avoid wrinkles and completely fit the vascular wall of the abdominal aorta after release, so as to avoid the problem of the bifurcation of the prior art being too large to be fully expanded; it can be anchored with the abdominal aorta to overcome the defect of insufficient anchoring area caused by the lesion involving the iliac artery near the bifurcation of the abdominal aorta. For the isolation of iliac artery aneurysm 9, the entire infrarenal abdominal aorta 6 does not need to be reconstructed intraluminally, but only sufficient anchoring area needs to be provided for the common iliac artery segment 21, that is, only a part of the length of the abdominal aorta stent 1 is needed to reconstruct, that is, the length of the abdominal aorta stent 1 is less than the length of the infrarenal abdominal aorta 6.
[0025] See also Figures 1 to 3 Preferably, the proximal opening of the abdominal aortic stent 1 is not covered with a film, and is a wavy bare frame area 13 formed by the metal wire stent. There is only a bare metal stent at the proximal end of the abdominal aortic stent 1 (the side close to the kidney is the proximal end), which can increase its adhesion to the abdominal aorta wall and reduce the risk of stent displacement.
[0026] See also Figures 1 to 3Preferably, the proximal opening and the distal opening of the short leg branch of the iliac artery 3 are both provided with a metal marker 4, and the short leg branch of the iliac artery 3 is used for the reconstruction of the healthy common iliac artery; the proximal opening and the distal opening of the long leg branch of the iliac artery 2 are both provided with a metal marker 4, and the long leg branch of the iliac artery 2 is used for the reconstruction of the affected common iliac artery. The proximal opening and the distal opening of the short leg branch of the iliac artery 3 and the long leg branch of the iliac artery 2 are both provided with two metal markers 4, which are respectively located at the 3 o'clock and 9 o'clock positions of the opening. The proximal openings of the short leg branch of the iliac artery 3 and the long leg branch of the iliac artery 2 are provided with a metal marker 4, which can be developed under X-ray fluoroscopy to provide a mark for the guide wire to enter the corresponding branch. The distal openings of the short leg branch of the iliac artery 3 and the long leg branch of the iliac artery 2 are provided with a metal marker 4 to provide a mark for further bridging stents of the short leg branch and the long leg branch (for example, an independent iliac artery stent 5, etc., which is an existing stent).
[0027] See also Figures 1 to 3 Preferably, the iliac artery short leg branch 3 can be connected to an independent iliac artery stent 5 that matches its size.
[0028] See also Figures 1 to 3 Preferably, the parallel length of the long leg branch 2 of the iliac artery and the short leg branch 3 of the iliac artery is 1.6-3.1 cm. In this embodiment, the preferred parallel length is 2 cm, or 2.3 cm, or 2.7 cm, or 3 cm, but is not limited thereto, to avoid premature bifurcation affecting the release effect.
[0029] See also Figures 1 to 3 Preferably, the fitting part of the iliac artery long leg branch 2 and the iliac artery short leg branch 3 forms an angle a of 8°-12° with the iliac artery long leg branch 2 at the distal end of the iliac artery short leg branch 3. The distal end of the iliac artery short leg branch 3 and the iliac artery long leg branch 2 are set at a certain angle to facilitate entering the corresponding iliac artery after release and deployment, avoiding jamming caused by forced bending. Preferably, in this embodiment, the angle a is 10°, and other angles can also be selected as needed, and there is no specific limitation on the angle.
[0030] See also Figures 1 to 3Preferably, the iliac artery long leg branch 2 includes a common iliac artery segment 21, an internal iliac artery segment 22 and an external iliac artery segment 23. The common iliac artery segment 21 is a segment of the iliac artery long leg branch 2 close to the abdominal aortic stent 1. The external iliac artery segment 23 is a segment of the iliac artery long leg branch 2 far from the abdominal aortic stent 1. The internal iliac artery segment 22 is connected to the inner side of the connection between the common iliac artery segment 21 and the external iliac artery segment 23. Metal markers 4 are provided at the proximal opening and distal opening of the internal iliac artery segment 22. Four metal markers 4 are provided at the proximal opening of the internal iliac artery segment 22, respectively located at the 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock positions of the opening; two metal markers 4 are provided at the distal opening of the internal iliac artery segment 22, respectively located at the 3 o'clock and 9 o'clock positions of the opening. The internal iliac artery segment 22 is used for internal iliac artery reconstruction, and the metal marker 4 at the proximal opening of the internal iliac artery segment 22 provides a mark for magnetic ultrasonic selection into this branch. The metal marker 4 at the distal opening of the anterior internal iliac artery segment provides an identification for further bridging the internal iliac artery stent.
[0031] The utility model has the following working principle:
[0032] 1. Puncture the affected femoral artery and left brachial artery and place a sheath;
[0033] 2. An angiography catheter is introduced through the sheath of the affected side. After angiography confirms the diagnosis, a stent is introduced through the affected side. The abdominal aorta stent 1 is positioned and then released until the internal iliac artery segment 22 of the long leg branch 2 of the iliac artery is completely released;
[0034] 3. Through the left brachial artery sheath, the guide wire cooperates with the catheter, through the abdominal aortic stent 1, the common iliac artery segment 21 of the long leg branch of the iliac artery 2, and the internal iliac artery segment 22, the internal iliac artery segment 22 is selected, and the internal iliac artery stent is introduced to bridge the internal iliac artery segment 22 of the stent to reconstruct the internal iliac artery;
[0035] 3. An independent iliac artery stent 5 is introduced through the left brachial artery puncture point, and its proximal end bridges the short leg branch 3 of the iliac artery;
[0036] 4. Completely release the distal opening of the long leg branch 2 of the iliac artery;
[0037] 5. Introduce a balloon to sequentially expand the proximal end of the abdominal aortic stent 1 (to make the outer wall of the abdominal aortic stent fit closely with the abdominal aorta 6), the distal end of the long leg branch of the iliac artery 2 (to make the long leg branch of the iliac artery fit closely with the iliac artery 7), so as to isolate the iliac artery aneurysm 9 of the iliac artery 7, the bridging section of the short leg branch of the iliac artery 3 and the independent iliac artery stent 5 (to make it completely fit with the internal iliac artery 8), and the distal end of the independent iliac artery stent 5.
[0038] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, which can be a mechanical connection or an electrical connection, or the internal connection between two components, or a direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.
[0039] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.
[0040] Finally, the above is only a preferred implementation of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.
[0041] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.
Claims
1. An abdominal aorta-iliac artery integrated inner external branch stent, which is composed of an elastic metal wire stent implantable in a human body and a coating covering the elastic metal wire stent; it includes an abdominal aorta stent, and an iliac artery long leg branch and an iliac artery short leg branch which are integrated with the abdominal aorta stent and are arranged at the distal end of the abdominal aorta stent, characterized in that: The abdominal aortic stent is in the shape of a straight cylinder, and a section near the distal end of the abdominal aortic stent is divided into a first outlet and a second outlet by a separation membrane composed of the elastic metal wire and the coating. The first outlet is connected to the proximal opening of the long leg branch of the iliac artery on the side away from the proximal end of the abdominal aortic stent, and the second outlet is connected to the proximal opening of the short leg branch of the iliac artery on the side away from the proximal end of the abdominal aortic stent.
2. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 1, characterized in that: The proximal opening of the abdominal aorta stent has no coating, and is a wavy bare frame area formed by the metal wire stent.
3. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 1, characterized in that: The proximal opening and the distal opening of the short leg branch of the iliac artery are both provided with metal markers, and the short leg branch of the iliac artery is used to reconstruct the common iliac artery on the healthy side; the proximal opening and the distal opening of the long leg branch of the iliac artery are both provided with metal markers, and the long leg branch of the iliac artery is used to reconstruct the common iliac artery on the affected side.
4. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 3, characterized in that: Two metal markers are arranged at the proximal opening and the distal opening of the short leg branch of the iliac artery and the long leg branch of the iliac artery.
5. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 1, characterized in that: The short leg branch of the iliac artery can be connected to an independent iliac artery stent that matches its size.
6. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 1, characterized in that: The length of the long leg branch of the iliac artery and the short leg branch of the iliac artery in parallel is 1.6-3.1 cm.
7. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 6, characterized in that: The joint between the long leg branch of the iliac artery and the short leg branch of the iliac artery forms an angle a of 8°-12° with the long leg branch of the iliac artery at the distal end of the short leg branch of the iliac artery.
8. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 1, characterized in that: The long leg of the iliac artery includes a common iliac artery segment, an internal iliac artery segment and an external iliac artery segment. The common iliac artery segment is a segment of the long leg of the iliac artery close to the abdominal aorta stent, the external iliac artery segment is a segment of the long leg of the iliac artery away from the abdominal aorta stent, and the internal iliac artery segment is connected to the inner side of the connection between the common iliac artery segment and the external iliac artery segment; metal markers are provided at the proximal opening and distal opening of the internal iliac artery segment.
9. The abdominal aorta-iliac artery integrated inner external branch stent according to claim 8, characterized in that: Four metal markers are disposed at the proximal opening of the internal iliac artery segment; and two metal markers are disposed at the distal opening of the internal iliac artery segment.