CN219397420U - Vascular breach plugging device - Google Patents

Abstract

The utility model relates to the technical field of medical appliances, in particular to a vascular breach plugging device which comprises a vascular breach plugging umbrella, wherein the vascular breach plugging umbrella comprises a central connecting piece, a plurality of supporting bodies and two plugging films, the supporting bodies are shape memory alloy pieces, the supporting bodies are connected to the peripheral wall of the central connecting piece, the supporting bodies comprise upright posts and two arc-shaped claws, the upright posts are fixedly connected to the peripheral wall of the central connecting piece, one plugging film is connected to the outer cambered surfaces of the arc-shaped claws at one end of all the supporting bodies in a covering manner, and the other plugging film is connected to the outer cambered surfaces of the arc-shaped claws at the other end of all the supporting bodies in a covering manner. The device can be contracted into a delivery sheath tube with the diameter not exceeding 12Fr, and is implanted into a vascular breach in a minimally invasive intervention mode, so that the damage to the blood vessel is reduced; the whole body is I-shaped, so that the arc claws at the two ends of the support body are positioned at the two sides of the blood vessel intima at the blood vessel breach, thereby realizing more firm positioning and avoiding the blood vessel breach plugging umbrella from being impacted and shifted by blood flow before the next operation.

Description

Vascular breach plugging device

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a vascular breach blocking device.

Background

Aortic dissection is due to the rupture of the intima of the aortic blood vessel, blood enters between the intima and the media of the aortic blood vessel, and high-pressure blood flow continuously tears the intima and the media of the blood vessel to form a false cavity, and the vessel wall is possibly broken at any time, so that fatal injury is caused to a patient. In the parting of aortic dissection, the standfordA type aortic dissection refers to the aortic dissection which is called as the standfordA type aortic dissection when the aortic dissection affects the ascending aorta no matter where the breach is located in the aortic blood vessel, and has rapid onset and high mortality rate, which is always a great problem in clinical treatment. Currently, the standard procedure for clinically treating the standfordA aortic dissection is also the full arch replacement trunk stent procedure proposed by the Sun Lizhong teachings, namely "Sunshan surgery". Some expert scholars have proposed new therapeutic ideas.

Patent document CN202210937712.0 discloses a sandwich breach blocking device, which proposes to block a vessel breach with a spring ring and to support the vessel with a bare stent; patent document CN202121071772.6 discloses an arterial vessel breach blocking device, which proposes to block a vessel breach using a blocking device; patent document CN201220439253.5 discloses a cardiovascular abnormal channel stopper, which adds 1 or more pairs of sliding-preventing bars in the center of the front disc of the stopper to prevent the stopper from slipping. These patent documents all achieve their intended purpose to some extent, but there are also problems:

1) After the spring ring of the interlayer breach blocking instrument is released, gaps exist, so that the breach blocking is incomplete, the spring ring has a larger volume and a certain thickness, after the bare stent supports the blood vessel, the spring ring is extruded to the wall of the blood vessel, and at the moment, the wall of the blood vessel is fragile and is easy to damage the wall of the blood vessel;

2) The plugging device for the arterial vessel breach and the like is easy to form a dumbbell-shaped structure after being released, is propped against the vessel wall, is easy to tear the inner membrane and the middle membrane of the vessel wall, has secondary damage to the vessel wall, is not firmly positioned, and is easy to shift or tear the vessel inner membrane under the impact of high-speed blood flow.

Thus, the drawbacks are quite apparent and there is a need to provide a solution.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a vascular breach blocking device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a vascular breach plugging device, it includes the vascular breach shutoff umbrella that is the I shape, vascular breach shutoff umbrella includes central connecting piece, a plurality of supporter and two shutoff membranes, the supporter is shape memory alloy spare, a plurality of supporter connect in the perisporium of central connecting piece, a plurality of supporters are annular array around the central axis of central connecting piece and distribute, the supporter includes stand and two arc claws, stand fixed connection is in the perisporium of central connecting piece, two arc claws symmetry set up in the both ends of stand, the intrados of two arc claws sets up relatively, one shutoff membrane cover ground is connected in the extrados of the arc claw of all supporter one ends, another shutoff membrane cover ground is connected in the extrados of the arc claw of all supporter other ends.

Further, the blocking film is a polymer material film.

Further, one end of the central connecting piece is closed, and the other end of the central connecting piece is provided with a threaded hole.

Further, the thickness a of the plugging film is 0.5mm to 1.0mm, and the height b of the vascular breach plugging umbrella is 3mm to 4mm.

Further, the vascular opening plugging device also comprises a vascular stent matched with the vascular opening plugging umbrella, and the vascular stent is a hollow cylindrical metal bare stent.

Further, the vascular stent comprises a plurality of wave rings which are sequentially connected, each wave ring is formed by connecting a plurality of bending pieces of shape memory alloy, and each bending piece is in a W shape, a V shape or a U shape.

Further, the first wave ring positioned on the vascular stent is a first wave ring, and the wave rings except the first wave ring on the vascular stent are second wave rings; in the first wave ring, a barb structure is arranged at the joint of two adjacent bending pieces.

Further, the barb structure is connected to the bending piece via a metal connection sleeve.

Further, in the wave ring, the highest point of the wave ring is a wave crest, and the lowest point of the wave ring is a wave trough; in two adjacent wave rings, the wave trough of the previous wave ring is in cross connection with the wave crest of the next wave ring.

Further, the inner wall or/and the outer wall of the vascular stent is/are provided with a polymer film, and the polymer film does not cover the stent holes of the vascular stent.

The utility model has the beneficial effects that: the utility model can be contracted into a delivery sheath tube with the diameter not exceeding 12Fr, and is implanted into a vascular breach in a minimally invasive intervention mode, so that the damage to the blood vessel is reduced; the whole structure is I-shaped, so that the arc claws at the two ends of the support body are positioned at the two sides of the blood vessel intima at the blood vessel breach, thereby realizing firmer positioning and avoiding the blood vessel breach plugging umbrella from being impacted and shifted by high-speed blood flow before the next operation.

Drawings

Fig. 1 is a schematic perspective view of a vascular access occlusion umbrella of the present utility model.

Fig. 2 is a schematic perspective view of the vascular breach blocking umbrella of the present utility model after concealing the blocking film.

Fig. 3 is a schematic perspective view showing a folding state of arc claws of the vascular access occlusion umbrella of the present utility model.

Fig. 4 is a front view of the vessel opening plugging umbrella of the present utility model.

Fig. 5 is a schematic perspective view of a stent according to the present utility model.

Fig. 6 is a schematic perspective view of a first wave band according to the present utility model.

Fig. 7 is an enlarged view at a in fig. 5.

Fig. 8 is a schematic structural view of the present utility model in a use state.

Fig. 9 is an enlarged view at B in fig. 8.

Reference numerals illustrate:

1. a vessel breach plugging umbrella; 10. a support body; 101. a column; 102. arc-shaped claws; 11. a blocking film; 12. a center connector; 121. a threaded hole; 2. a vascular stent; 20. a first wave ring; 201. a metal connection sleeve; 200. a barb structure; 21. a second wave ring; 221. and a bending piece.

Detailed Description

The utility model will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the utility model.

As shown in fig. 1 to 9, the utility model provides a vascular access occlusion device mainly used for treating a StandfordA aortic dissection, which comprises a vascular access occlusion umbrella 1 which is in an i shape as a whole, wherein the vascular access occlusion umbrella 1 comprises a central connecting piece 12, a plurality of supporting bodies 10 and two occlusion membranes 11; preferably, as shown in fig. 2, the number of the supporting bodies 10 is three, the supporting bodies 10 are shape memory alloy pieces, a plurality of supporting bodies 10 are connected to the peripheral wall of the central connecting piece 12, and the plurality of supporting bodies 10 are distributed in an annular array around the central axis of the central connecting piece 12, so that the vascular access plugging device has uniform structure and good stability; the supporting body 10 comprises a stand column 101 and two arc claws 102, as shown in fig. 3, the supporting body 10 adopts a metal material with a shape memory function, such as nickel-titanium alloy, and the like, and after heat treatment, the arc claws 102 at two ends of the supporting body 10 can be arbitrarily folded and bound; the upright post 101 is fixedly connected to the peripheral wall of the central connecting member 12 to fix the upright post 101 so that the upright post 101 is not bent; the two arc-shaped claws 102 are symmetrically arranged at the two ends of the upright post 101, the inner cambered surfaces of the two arc-shaped claws 102 are oppositely arranged, and the radian of the inner cambered surface of the arc-shaped claw 102 is convenient for positioning the vascular access plugging umbrella 1 on the vascular wall; one blocking film 11 is connected with the outer cambered surfaces of the arc-shaped claws 102 at one end of all the supporting bodies 10 in a covering manner, the other blocking film 11 is connected with the outer cambered surfaces of the arc-shaped claws 102 at the other end of all the supporting bodies 10 in a covering manner, and the blocking film 11 is used for blocking vascular access; 1Fr is approximately 0.33mm; the aortic dissection of the Standford type a is also known as aortic dissection type a.

The vascular breach blocking umbrella 1 with the structural design can be contracted into a delivery sheath tube with the diameter not more than 12Fr, and is implanted into a vascular breach in a minimally invasive intervention mode, so that the damage to the blood vessel is reduced; the whole structure is I-shaped, so that the arc claws 102 at the two ends of the support body 10 are positioned at the two sides of the blood vessel intima at the blood vessel breach, thereby realizing more firm positioning and avoiding the blood vessel breach plugging umbrella 1 from being impacted and shifted by high-speed blood flow before the next operation. In practical use, the vascular breach plugging umbrella 1 is implanted through a delivery catheter, and the specific implantation steps are as follows:

1) Pushing the blocking film 11 at least one end of the H-shaped vascular access blocking umbrella 1 to the vascular access by using a conveying catheter, so that the blocking film 11 at least one end is positioned between an inner film and a middle film at the vascular access;

2) Releasing the blocking film 11 between the inner film and the middle film, and pulling the conveying catheter backwards to enable the blocking film 11 at one end to be attached to the vascular wall of the vascular inner film;

3) The blocking film 11 at the other end is released, and the delivery catheter is withdrawn, so that the vascular access blocking umbrella 1 can completely clamp the two sides of the vascular intima and block the vascular access, and the continuous inflow of blood flow into the vascular false cavity is avoided.

In this embodiment, the blocking film 11 is a polymer film, for example: high molecular materials such as polytetrafluoroethylene, polyester and the like are light, thin, difficult to grow thrombus and good in biocompatibility; the blocking film 11 can be firmly combined with the outer side wall of the arc-shaped claw 102 of the supporting body 10 by adopting a sewing or high-temperature firing mode; the blocking film 11 is positioned on the arc claws 102 at the two ends of the supporting body 10 and completely covers the arc claws 102, which is beneficial to completely blocking the vascular access after the vascular access blocking umbrella 1 is implanted.

In this embodiment, the central connecting piece 12 is made of cylindrical metal material, one end of the central connecting piece 12 is closed, and the other end of the central connecting piece 12 is provided with a threaded hole 121, so that the connection with a conveying system is facilitated; the center connector 12 may be welded or otherwise connected to the support body 10. In use, the delivery cable with external threads at the head end is in threaded connection with the threaded hole 121 connected to the center, and after the vessel opening plugging umbrella 1 is released to the desired position by the delivery cable, the delivery cable with external threads is unscrewed, so that the delivery cable is disengaged from the center connector 12.

In this embodiment, as shown in fig. 4, the thickness a of the sealing film 11 is 0.5mm to 1.0mm, and the height b of the vascular access sealing umbrella 1 is 3mm to 4mm. This structural design has both been favorable to shutoff membrane 11 softer, better attached in the vascular wall, can avoid again that the blood vessel breach shutoff umbrella 1 is too thick, causes tearing to blood vessel intima and media, causes the secondary damage to the vascular wall.

In this embodiment, as shown in fig. 5, the vascular access plugging device further includes a vascular stent 2 that is used in cooperation with the vascular access plugging umbrella 1, where the vascular stent 2 is a hollow cylindrical metal bare stent; the vascular stent 2 is used for expanding the true lumen of the blood vessel and keeping the blood flow smooth. When the vascular opening plugging umbrella 1 is matched with the vascular stent 2 for use, the vascular opening can be plugged through the vascular opening plugging umbrella 1, and the vascular true cavity and the compression false cavity can be expanded through the vascular stent 2, so that the smooth blood flow is kept, and the treatment effect is better.

As shown in fig. 5 and 6, in this embodiment, the stent 2 includes a plurality of wave rings sequentially connected, each wave ring is formed by connecting a plurality of bending members 221 made of shape memory alloy, and the bending members 221 are W-shaped, V-shaped or U-shaped. The structural design is convenient for braiding and heat setting the vascular stent 2, and the finally obtained vascular stent 2 also has a good shape memory function, can be contracted in a smaller delivery sheath tube, and is convenient for implantation into a human body.

As shown in fig. 5 and 6, in the present embodiment, the first band located on the stent 2 is the first band 20, and the bands on the stent 2 other than the first band 20 are the second bands 21; in the first wave ring 20, a barb structure 200 is provided at the junction of two adjacent bending pieces 221. The barb structure 200 can firmly anchor the vascular stent 2 on the vascular wall after being released to the blood vessel, so as to prevent the vascular stent 2 from being shifted; of course, the first wave ring 20 may not include the barb structure 200, and the stent 2 is anchored to the vessel wall by its radial supporting force.

As shown in fig. 6, in this embodiment, the barb structure 200 is fixedly connected to the bending member 221 via the metal connecting sleeve 201; this structural design facilitates the connection of barb structure 200 to bending member 221 and is firmly connected.

As shown in fig. 7, in the present embodiment, in the wave band, the highest point of the wave band is a peak, and the lowest point of the wave band is a trough; in two adjacent wave rings, the wave trough of the previous wave ring is cross-connected with the wave crest of the next wave ring and welded together. The structural design ensures that the vascular stent 2 has good flexibility and is better attached to the vascular wall.

In this embodiment, the inner wall or/and the outer wall of the vascular stent 2 is provided with a polymer film, and the polymer film does not cover the stent holes of the vascular stent 2. The polymer membrane is connected with the vascular stent 2 at the bending part 221 of the vascular stent 2, so that the whole vascular stent 2 is still provided with a stent hole, and only the bending part 221 is provided with the polymer membrane, so that the contact area between the vascular stent 2 and blood can be reduced, and the risk of thrombus formation can be reduced.

As shown in fig. 8 and 9, in practical application, the vascular opening plugging umbrella 1 is implanted into the vascular opening in a minimally invasive intervention mode, the vascular opening is plugged, then the vascular stent 2 is implanted into a lesion vascular region containing the vascular opening in a minimally invasive intervention mode, the self-expansion function of the vascular stent 2 is used for expanding the true cavity of the blood vessel, and the vascular opening plugging umbrella 1 is firmly compressed on the vascular wall at the vascular opening, so that the therapeutic purpose is achieved.

The foregoing embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.

Claims (10)

1. A vascular breach blocking device, characterized in that: including being vascular breach shutoff umbrella (1) of I shape, vascular breach shutoff umbrella (1) include central connecting piece (12), a plurality of supporter (10) and two shutoff membranes (11), supporter (10) are shape memory alloy spare, a plurality of supporter (10) are connected in the perisporium of central connecting piece (12), the central axis of a plurality of supporter (10) around central connecting piece (12) is annular array and distributes, supporter (10) include stand (101) and two arc claw (102), stand (101) fixed connection is in the perisporium of central connecting piece (12), two arc claw (102) symmetry set up in the both ends of stand (101), the intrados of two arc claw (102) set up relatively, one shutoff membrane (11) are connected in the extrados of arc claw (102) of all supporter (10) one end, the extrados of arc claw (102) of all supporter (10) are connected in the cover ground to another shutoff membrane (11).

2. The vascular access occlusion device of claim 1, wherein: the blocking film (11) is a polymer material film.

3. The vascular access occlusion device of claim 1, wherein: one end of the central connecting piece (12) is closed, and a threaded hole (121) is formed in the other end of the central connecting piece (12).

4. The vascular access occlusion device of claim 1, wherein: the thickness a of the plugging film (11) is 0.5mm to 1.0mm, and the height b of the vascular breach plugging umbrella (1) is 3mm to 4mm.

5. A vascular access occlusion device according to any of claims 1 to 4, wherein: the vascular breach plugging device also comprises a vascular stent (2), wherein the vascular stent (2) is a hollow cylindrical metal bare stent.

6. The vascular access occlusion device of claim 5, wherein: the vascular stent (2) comprises a plurality of wave rings which are sequentially connected, each wave ring is formed by connecting a plurality of bending pieces (221) of shape memory alloy, and each bending piece (221) is in a W shape, a V shape or a U shape.

7. The vascular access occlusion device of claim 6, wherein: the wave ring at the head end of the vascular stent (2) is a first wave ring (20), and the wave rings on the vascular stent (2) except the first wave ring (20) are second wave rings (21); in the first wave ring (20), a barb structure (200) is arranged at the joint of two adjacent bending pieces (221).

8. The vascular access occlusion device of claim 7, wherein: the barb structure (200) is connected to the bending piece (221) via a metal connection sleeve (201).

9. The vascular access occlusion device of claim 6, wherein: in the wave ring, the highest point of the wave ring is a wave crest, and the lowest point of the wave ring is a wave trough; in two adjacent wave rings, the wave trough of the previous wave ring is in cross connection with the wave crest of the next wave ring.

10. The vascular access occlusion device of claim 5, wherein: the inner wall or/and the outer wall of the vascular stent (2) is/are provided with a polymer film, and the polymer film does not cover stent holes of the vascular stent (2).