Ball-expanding covered stent for aortic iliac artery occlusion

Abstract

The utility model discloses a ball dilation covered stent for major iliac artery occlusion, and relates to the technical field of medical instruments, the ball dilation covered stent for major iliac artery occlusion comprises a stent structure and a dilation air bag, the stent structure comprises a main channel and two branch channels, the two branch channels are D-shaped and are connected with one end of the main channel; the surface of the expansion air bag is movably connected with the inner side walls of the main channel and the two branch channels; the surface of the expansion air bag is fixedly connected with an anti-disengagement ring, and the surface of the anti-disengagement ring is connected with the end, away from the main channel, of the branch channel, so that the problem that when an existing ball expansion type stent is placed, the stent can be inconveniently and effectively placed in the main iliac artery due to friction between the stent and a blood vessel is solved; and meanwhile, the expansion air bag is inconvenient to take out.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely is a kind of ball expansion covered stent for aortoiliac occlusive disease. BACKGROUND

[0002] Blood vessel stent is often used in treating blood vessel disease, by sending blood vessel stent into the occlusion section in blood vessel and expanding after positioning, so that the blood flow in blood vessel restores unobstructed, blood vessel stent placement surgery has the characteristics of high success rate, small wound, long effective time, is the effective means for blood vessel dilatation. The blood vessel stent used in clinic at present mainly includes two types according to release mode: self-expanding stent that expands by itself after being released in blood vessel, and ball expansion stent that expands by balloon in blood vessel, and the stent for peripheral artery is mostly self-expanding stent, and ball expansion stent is often selected for the position of arterial opening lesion and not easy to be pressed by external force.

[0003] The existing ball expansion stent can not be placed into the aortoiliac artery effectively due to friction between the stent and the blood vessel when placing, and the expansion balloon is not convenient to take out. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of ball expansion covered stent for aortoiliac occlusive disease to solve the problem that the existing ball expansion stent can not be placed into the aortoiliac artery effectively due to friction between the stent and the blood vessel when placing, and the expansion balloon is not convenient to take out.

[0005] The utility model provides the following technical scheme: a kind of ball expansion covered stent for aortoiliac occlusive disease, including stent structure and expansion balloon, the stent structure includes main channel and two branch channels, two the branch channel is all D type and is connected with the one end of main channel;The surface of the expansion balloon is movably connected with the inner side wall of main channel and two branch channels;The surface of the expansion balloon is fixedly connected with anti-drop ring, and the surface of the anti-drop ring is connected with the one end of branch channel away from main channel.

[0006] As a preferred technical scheme of the utility model, the main channel includes first support net and first expansion membrane, the first expansion membrane is wrapped on the surface of first support net, the branch channel includes second support net and second expansion membrane, the second expansion membrane is wrapped on the surface of second support net, and the first expansion membrane and the second expansion membrane are integrally formed.

[0007] As a preferred technical scheme of the utility model, the expansion balloon includes first inflatable part and second inflatable part, the first inflatable part is connected with the second inflatable part inside, and the first inflatable part and the second inflatable part are connected with inflatable pipe.

[0008] As a preferred embodiment of the present invention, the second inflation part includes a branch part and a closing part, the branch part and the closing part are integrally formed, the branch part is movably connected to the inner wall of a branch channel, the closing part is movably connected to the inner wall of the main channel, and the first inflation part is movably connected to the inner wall of another branch channel.

[0009] As a preferred embodiment of the present invention, the first inflatable part has a protrusion, the closed part has a concave part, and the protrusion of the first inflatable part contacts the concave part of the closed part.

[0010] As a preferred technical solution of this utility model, a guide wire is fixedly connected to the inner wall of the closed part. One end of the guide wire passes through the second inflation part and extends into the interior of the inflation tube, and finally moves through the inflation tube.

[0011] As a preferred embodiment of this utility model, the surface of the inflation tube is provided with a pull-out channel, and a rubber strip is fixedly connected to the surface of the guide wire. The surface of the rubber strip is movably connected to the inner wall of the pull-out channel.

[0012] Compared with the prior art, this utility model provides a bulbodilatation covered stent for aortoiliac artery occlusive disease, which has the following beneficial effects:

[0013] This balloon-expandable covered stent for aortoiliac artery occlusion features an anti-dislodgement ring that remains in contact with the stent structure during stent deployment. This prevents the stent structure from detaching from the expansion balloon due to friction between the stent structure and the artery. After the balloon-expandable covered stent is fully deployed, gas or fluid is extracted through the inflation tube, and the guidewire is pulled. This guidewire pulls the sealing section into the branch area, after which the entire expansion balloon is detached from the balloon-expandable covered stent. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the first support net structure of this utility model.

[0016] Figure 3 This is a cross-sectional view of the bracket of this utility model.

[0017] Figure 4 This is a cross-sectional view of the extended airbag of this utility model when it is deployed.

[0018] Figure 5 This utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0019] Figure 6 This utility model Figure 4 Enlarged view of the structure at point B in the middle.

[0020] In the figure: 1, main channel; 101, first support net; 102, first expansion film; 2, branch channel; 201, second support net; 202, second expansion film; 3, anti-off ring; 4, first inflation part; 5, second inflation part; 501, branch part; 502, closed part; 6, inflation tube; 7, guide wire; 8, pulling channel; 9, rubber strip. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-6 The utility model discloses a kind of ball expansion covered stent for aortoiliac occlusive disease, including stent structure and expansion balloon, stent structure includes main channel 1 and two branch channels 2, two branch channels 2 are all D type and are connected with the one end of main channel 1;The surface of expansion balloon is movably connected with the inner side wall of main channel 1 and two branch channels 2;Expansion balloon is fixedly connected with anti-off ring 3 on surface, and the surface of anti-off ring 3 is connected with the one end of branch channel 2 away from main channel 1.

[0023] Specifically, main channel 1 includes first support net 101 and first expansion film 102, first expansion film 102 is wrapped on the surface of first support net 101, branch channel 2 includes second support net 201 and second expansion film 202, second expansion film 202 is wrapped on the surface of second support net 201, and first expansion film 102 is integrally formed with second expansion film 202.

[0024] Expansion balloon includes first inflation part 4 and second inflation part 5, and first inflation part 4 is connected with the inside of second inflation part 5, and first inflation part 4 and second inflation part 5 are connected with inflation tube 6.

[0025] Second inflation part 5 includes branch part 501 and closed part 502, branch part 501 is integrally formed with closed part 502, branch part 501 is movably connected with the inner side wall of one branch channel 2, closed part 502 is movably connected with the inner side wall of main channel 1, and first inflation part 4 is movably connected with the inner side wall of another branch channel 2.

[0026] In the embodiment, the gas or liquid is injected into the expansion balloon through the inflation tube 6, so that the gas or liquid enters the first inflation part 4 and the second inflation part 5, wherein the second inflation part 5 comprises a branch part 501 and a closed part 502, the first inflation part 4 has a protruding part, the closed part 502 has an inner recess, and the protruding part of the first inflation part 4 is in contact with the inner recess of the closed part 502.

[0027] Specifically, the first inflation part 4 has a protruding part, the closed part 502 has an inner recess, and the protruding part of the first inflation part 4 is in contact with the inner recess of the closed part 502.

[0028] In the embodiment, the protruding part of the first inflation part 4 is in contact with the inner recess of the closed part 502, so that the first inflation part 4 and the closed part 502 are connected, the force on the part of the stent structure is uniform, and the stent structure is convenient to expand.

[0029] Specifically, the inner side wall of the closed part 502 is fixedly connected with a guide wire 7, one end of the guide wire 7 penetrates through the second inflation part 5 and extends to the inside of the inflation tube 6, and finally penetrates through the inflation tube 6.

[0030] In the embodiment, the gas or liquid is extracted through the inflation tube 6, and the guide wire 7 is pulled, so that the guide wire 7 pulls the closed part 502 into the inside of the branch part 501, and then the entire expansion balloon is separated from the stent.

[0031] Specifically, the surface of the inflation tube 6 is provided with a pulling channel 8, and the surface of the guide wire 7 is fixedly connected with a rubber strip 9, and the surface of the rubber strip 9 is movably connected with the inner side wall of the pulling channel 8.

[0032] In the embodiment, the pulling channel 8 and the rubber strip 9 are arranged, so that the guide wire 7 is sealed and pulled, and leakage is prevented.

[0033] The working principle and use process of the utility model are as follows: in use, the expansion balloon and the stent structure attached to the surface of the expansion balloon are inserted into the iliac artery, the stent structure is sent into the abdominal aorta through one of the iliac arteries and finally penetrates into the abdominal aorta through the bifurcation, and after being placed, the entire endograft stent is located in the abdominal aorta and the two branch channels 2 are directed to the bifurcation of the iliac arteries. Figure 4As shown, the first inflatable part 4 has a protruding part, the closed part 502 has an inner recess, and the protruding part of the first inflatable part 4 is in contact with the inner recess of the closed part 502. When inflated or filled with liquid, the first inflatable part 4 expands, and the branch part 501 and the closed part 502 also expand, thereby achieving the extrusion of the two branch channels 2 and the main channel 1, unfolding the second support net 201 and the first support net 101, and making the balloon-expandable stent graft adhere to the bilateral iliac arteries.

[0034] When the balloon-expandable stent graft is pushed, the anti-disengagement ring 3 is always in contact with the stent structure, which can prevent the stent structure from being disengaged from the expanding balloon due to friction with the artery. After the balloon-expandable stent graft is fully expanded, the gas or liquid is extracted through the inflation tube 6, and the guide wire 7 is pulled, so that the guide wire 7 pulls the closed part 502 into the inside of the branch part 501, and then the entire expanding balloon is disengaged from the balloon-expandable stent graft.

[0035] In summary, the balloon-expandable stent graft for aortoiliac occlusive disease can effectively and conveniently place the stent in the aortoiliac artery by setting the anti-disengagement ring 3, the guide wire 7, and the first inflatable part 4 and the second inflatable part 5, and is also convenient for taking out the expanding balloon.

[0036] It should be noted that in this document, terms such as "comprise", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed or inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of another identical element in the process, method, article or device comprising the element.

[0037] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A balloon-expandable covered stent for aortoiliac occlusive disease, comprising a stent structure and an expansion balloon, characterized in that: The support structure comprises a main channel (1) and two branch channels (2), both of which are D-shaped and connected with one end of the main channel (1); The surface of the expansion air bag is movably connected with the inner side walls of the main channel (1) and the two branch channels (2); The surface of the expansion air bag is fixedly connected with an anti-dropping ring (3), and the surface of the anti-dropping ring (3) is connected with one end of the branch channel (2) away from the main channel (1).

2. The balloon-expandable covered stent for aortoiliac occlusive disease according to claim 1, wherein: The main channel (1) comprises a first support net (101) and a first expansion film (102), the first expansion film (102) is wrapped on the surface of the first support net (101), the branch channel (2) comprises a second support net (201) and a second expansion film (202), the second expansion film (202) is wrapped on the surface of the second support net (201), and the first expansion film (102) and the second expansion film (202) are integrally formed.

3. The balloon-expandable covered stent for aortoiliac occlusive disease according to claim 1, wherein: The expansion air bag comprises a first inflation part (4) and a second inflation part (5), the first inflation part (4) and the second inflation part (5) are connected with each other inside, and the first inflation part (4) and the second inflation part (5) are connected with the inflation pipe (6).

4. The balloon-expandable covered stent for aortoiliac occlusive disease according to claim 3, wherein: The second inflation part (5) comprises a branch part (501) and a closed part (502), the branch part (501) and the closed part (502) are integrally formed, the branch part (501) is movably connected with the inner side wall of one branch channel (2), the closed part (502) is movably connected with the inner side wall of the main channel (1), and the first inflation part (4) is movably connected with the inner side wall of the other branch channel (2).

5. The balloon-expandable covered stent for aortoiliac occlusive disease according to claim 4, wherein: The first inflation part (4) has a protruding part, the closed part (502) has an inner recessed part, and the protruding part of the first inflation part (4) is in contact with the inner recessed part of the closed part (502).

6. The balloon-expandable covered stent for aortoiliac occlusive disease according to claim 4, wherein: The inner side wall of the closed part (502) is fixedly connected with a guide wire (7), one end of the guide wire (7) penetrates through the second inflation part (5) and extends to the inside of the inflation pipe (6), and finally movably penetrates through the inflation pipe (6).

7. The balloon-expandable covered stent for aortoiliac occlusive disease according to claim 6, wherein: The surface of the inflation pipe (6) is provided with a pulling channel (8), the surface of the guide wire (7) is fixedly connected with a rubber strip (9), and the surface of the rubber strip (9) is movably connected with the inner side wall of the pulling channel (8).

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