CN116763494B - An anti-leakage stent system for aortic arch branches - Google Patents

Abstract

The invention belongs to the technical field of medical equipment, in particular to an aortic arch part branch anti-leakage bracket system, wherein a branch tectorial membrane is communicated with the side part of a main tectorial membrane; the inner wall of the branch tectorial membrane is connected with a framework, the end part of the branch tectorial membrane is connected with an outer cap and an inner cap, a cavity is formed between the outer cap and the inner cap, and the joint of the main tectorial membrane and the branch tectorial membrane is covered. According to the invention, the function of blocking the suture gap is realized through the cavity structure design between the outer cover cap and the inner cover cap, the gap can be blocked through blood coagulation, the problem of blood leakage at the gap between the branch covering film and the main covering film is solved, the function of supporting the branch covering film pore canal is realized through the structure design of arranging the framework on the branch covering film, the opening of the branch covering film pore canal is supported by the framework, the pore canal collapse closure is avoided, and the branch covering film pore canal is supported by the framework on the branch covering film, and the pore canal collapse closure is avoided.

Description

An anti-leakage stent system for aortic arch branches

Technical field

The invention relates to the technical field of medical equipment, specifically an anti-leakage stent system for aortic arch branches.

Background technique

In recent years, minimally invasive endovascular treatment technology in vascular surgery has made great progress. Vascular stents have been widely used in the treatment of systemic vascular diseases. Aortic lesions usually involve separation of the arterial wall and intima, forming a false lumen, and Intimal injury, an aortic arch branch anti-leakage stent system passes through the femoral artery incision of the human body and delivers the covered stent to the thoracic aortic lesion of the human body through the conveyor. It can protect the diseased blood vessels and can also repair it. For aortic lesions, this approach can avoid open surgery.

Generally, a branch coating on an anti-leakage stent system for an aortic arch branch connects the main coating and the branch coating through sutures, and adds branch coatings based on the number of damaged branch vessels at the location of human disease. The branch coating is connected to the branch coating. The main coating is filled with multiple equally spaced support frames. The branch coating and the main coating are pressed against the inner wall of the blood vessel through the support frame. The vein wall of the blood vessel is supported to eliminate false lumen.

This kind of aortic arch branch anti-leakage stent system has the branch coating installed on the main coating. There is a gap at the connection between the branch coating and the main coating. The sealing is poor, and blood will flow from the gap between the branch coating and the main coating. If there is leakage at the branch coating and the main coating, if the gap between the support frame is the connection point between the branch coating and the main coating, the support frame cannot support the branch coating, and the channels of the branch coating will collapse, affecting blood circulation.

Contents of the invention

Based on this, it is necessary to provide an anti-leakage stent system for aortic arch branches to address the problems of bleeding and pore collapse at the connection between the main covering and the branch covering in the prior art.

In order to achieve the above objects, the present invention adopts the following technical solutions:

An anti-leakage stent system for aortic arch branches according to the present invention includes a main coating and a branch coating, and the main coating is connected with the branch coating;

The ends of the branch covering membranes are connected with an outer cap and an inner cap, a cavity is formed between the outer cap and the inner cap, and the outer cap and the inner cap are both sewn to the side of the main covering membrane.

Further, the outer cap is continuously sewn to the inner wall of the main coating through sutures, and the inner cap is intermittently sewn to the inner wall of the main coating through sutures. The outer cap adopts a trumpet-shaped structure, and the opening of the outer cap is The area is smaller than the opening area of the inner cap.

Furthermore, a circular hole is provided at the connection between the branch covering film and the main covering film, and the outer cap and the inner cap are connected via a partition. A plurality of partitions are provided and placed in the cavity to divide the cavity into a plurality of small cavities.

Furthermore, a plurality of frames are provided on the inner wall of one end of the branch covering, and the frames are in a polygonal or circular structure, and the length of the frames is 150-200 mm, and the frames extend from the branch covering to the side of the inner cap.

Further, the inner wall of the other end of the branch coating is provided with a branch support frame, and the branch support frames are provided in multiple groups, two of which form a group, and the two branch support frames in one or more groups are symmetrically arranged. , the remaining branch support frames are distributed at equal intervals, and the branch support frames adopt an annular wavy structure.

Further, the inner wall of the branch coating is provided with branch reinforcing ribs. There are multiple branch reinforcing ribs, and each of the branch reinforcing ribs passes through the branch support frame.

Further, the inner wall of the main coating is provided with multiple groups of main supporting frames, two of which form a group, wherein two of the main supporting frames in one or more groups of two are arranged symmetrically, and the two symmetrical main supporting frames are arranged symmetrically. One or more branch coatings are provided in the support frame, and one branch coating is provided between the remaining two main support frames. The main support frame adopts an annular wave-shaped structure.

Further, the inner wall of the main coating is provided with a plurality of main reinforcing ribs, and each of the main reinforcing ribs passes through the main support frame.

Furthermore, the aortic arch branch anti-leakage stent system is entirely made of polytetrafluoroethylene.

Further, the length of the main covering film is 80-240 mm, and the diameter is 30-45 mm.

Compared with the existing technology, the beneficial effects of the present invention include:

1. The present invention realizes the function of blocking the suture gap through the design of the cavity structure between the outer cap and the inner cap. The outer cap can be filled with blood and expanded to block the gap, thus solving the problem between the branch coating and the main coating. The problem of blood leakage in the gap.

2. The present invention achieves the function of supporting the branch coating channels by arranging a skeleton on the branch coating and the inner cap. The skeleton is used to support the opening of the branch coating channel to avoid collapse and closure of the channel.

3. Through the symmetrical structural design of the main support frame, the present invention increases the distance between two adjacent main support frames to prevent the branch coating from being too close to the main support frame, which affects the stability of the aortic coating by the support frame. , and avoid the problem of the support frame crushing the branch coating when the main coating is bent.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure of the present invention will be described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of the present invention, and in the drawings, like reference numerals are used to refer to like parts. in:

FIG1 is a schematic diagram of a three-dimensional structure of the present invention;

FIG2 is a schematic diagram of a branch coating structure of the present invention;

Figure 3 is an enlarged schematic diagram of the cavity structure of part A of Figure 2;

FIG. 4 is a schematic diagram of the outer cap structure of the present invention.

Figure 5 is a schematic cross-sectional view of the inner cap structure of the present invention.

Notes in the figure: 1. Main coating; 2. Main support frame; 3. Main stiffener; 4. Branch coating; 5. Branch support frame; 6. Skeleton; 7. Outer cap; 8. Inner cap; 9 , cavity; 10. Branch reinforcement.

Detailed ways

It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, those of ordinary skill in the art can propose various structural methods and implementation methods that can be replaced with each other. Therefore, the following specific embodiments and drawings are only illustrative descriptions of the technical solutions of the present invention, and should not be regarded as the entirety of the present invention or as limitations or restrictions on the technical solutions of the present invention.

The present invention introduces an anti-leakage stent system for aortic arch branch, as shown in Figure 1. The whole system is made of polytetrafluoroethylene. As shown in Figure 1, it includes a main coating 1, and the length of the main coating 1 is 80 -240 mm, with a diameter of 30-45 mm. The main coating 1 is inserted into the human artery, and the shape of the main coating 1 is used to reset the artery wall. There are branch coatings 4 connected to the side of the main coating 1 to damage the artery as needed. The number of connected branch blood vessels and the number of branch coatings 4 are added. The branch coating 4 is used to support the branch blood vessels. The main coating 1 and the branch coating 4 can protect the diseased blood vessels and can also repair aortic lesions. Avoid open surgery, and place the main covering 1 and branch covering 4 against the blood vessels to repair the false lumen and choroid, and adjust various indicators within the normal range.

Clearly diagnose the design scope of aortic dissection and affected branch vessels, determine the location of the lesion, and then accurately insert the aortic stent graft, intravascular ultrasound or repeat aortography, and confirm the disappearance of the vascular dissection through contrast imaging

As shown in Figure 2, a branch support frame 5 is provided on the inner wall of one end of the branch coating 4. The branch support frames 5 are provided in multiple groups, two by two in a group, wherein the two branch support frames 5 in one or more groups are symmetrically arranged, and the remaining branch support frames 5 are distributed at equal intervals. The branch support frames 5 adopt an annular wavy structure. The branch support frames 5 support the branch coating 4 so that the branch coating 4 can fit the blood vessel, eliminate the false cavity in the blood vessel, and maintain blood circulation in the branch coating 4. The inner wall of the branch coating 4 is provided with branch reinforcement ribs 10. There are multiple branch reinforcement ribs 10, and each branch reinforcement rib 10 passes through the branch support frame 5, so that adjacent main branch support frames 5 support each other to improve the support effect.

As shown in Figures 2 and 4, the other end of the branch coating 4 is provided with multiple skeletons 6 on the inner wall. The length of the skeleton 6 is 150-200 mm. The skeleton 6 adopts one of polygonal or circular structures. The skeleton 6 pairs of branches. The cover 4 is supported and fixed to maintain the opening of the end channel of the branch cover 4, so that the channel always maintains a fixed opening area to facilitate blood circulation and avoid suturing between the stents when suturing the main cover 1 and the branch cover 4. , the frame 6 extends from the branch covering 4 to the side of the inner cap 8 .

By arranging the skeleton 6 on the branch coating 4 and the inner cap 8, the function of supporting the branch coating 4 channels is realized, and the skeleton 6 is used to support the opening of the branch coating 4 channels to avoid collapse and closure of the channels.

As shown in Figure 1, the inner wall of the main coating 1 is provided with multiple sets of main support frames 2. The main support frames 2 support the main coating 1 and push the main coating 1 against the inner wall of the blood vessel to support the blood vessel wall. To repair the false lumen in the blood vessel, the main support frame 2 adopts an annular wave-like structure. The main support frame 2 is provided with multiple groups, two by two, and two main support frames 2 are arranged symmetrically in one or more groups. , one or more branch coatings 4 are set inside the two symmetrical main support frames 2, and a branch coating 4 is set between the remaining two main support frames 2. The two main support frames 2 are placed symmetrically to increase the distance between them. The distance between the large branch coating 4 and the main support frame 2 prevents the branch coating 4 from being close to the main support frame 2 and affects the stability of the main coating 1, and prevents the branch coating 4 from being in contact with the main support when the main coating 1 bends. The frames 2 are close to each other, and the main support frame 2 is pressed against the branch coating 4, causing the through hole area at the connection between the main coating 1 and the branch coating 4 to become smaller, affecting the blood circulation at the branch coating 4.

As shown in Figure 1, the inner wall of the main covering 1 is fixedly connected with main reinforcing ribs 3. There are multiple main reinforcing ribs 3. Each main reinforcing rib 3 is installed on all the main support frames 2. The main reinforcing ribs 3 The orientation of 3 is the same as that of the main coating 1. The main reinforcing rib 3 supports the main coating 1. The main support frame 2 cooperates with the main reinforcing rib 3 to prevent the main coating 1 from becoming flat. The inner bend of the main coating 1 To avoid affecting the bending of the main covering 1, the main reinforcing ribs 3 are strung on the sides of the main support frame 2, so that the adjacent main support frames 2 support each other to improve the support effect.

As shown in Figure 4, the end of the branch coating 4 connects the outer cap 7 and the inner cap 8. The outer cap 7 is placed on the outside of the inner cap 8. The outer cap 7 adopts a trumpet-shaped structure. The opening area of the outer cap 7 is larger than that of the inner cap 8. The opening area of the cap 8 is small.

As shown in Figures 3 and 5, the outer cap 7 is continuously sutured to the inner wall of the main covering 1, so that blood cannot easily seep out from the suture between the outer cap 7 and the main covering 1, and the inner cap 8 is intermittently sutured to the main covering 1. On the inner wall, blood can slowly seep out from the suture between the inner cap 8 and the main covering 1. A cavity 9 is formed between the outer cap 7 and the inner cap 8. The cavity 9 is provided with a partition, and the partition is provided with Multiple, and distributed annularly around the branch coating 4, the angle between the two partitions is thirty degrees or forty-five degrees, the partitions divide the cavity 9 into multiple small cavities, and the partitions open the outer cap 7 and the inner cap 8, so that the opening between the outer cap 7 and the inner cap 8 is always open, so that the blood that slowly seeps out from the suture between the inner cap 8 and the main covering 1 can enter the cavity 9. Compared with Blood enters the gap between the outer cap 7 and the main film 1, and the blood enters the cavity 9 more easily.

Blood leaks from the gap between the branch covering 4 and the main covering 1, and will seep into the cavity 9 from the discontinuous suture between the inner cap 8 and the outer cap 7. The outer cap 7 will be filled with blood into the cavity 9, so that the outer cap 7 will be The blood pushes up, and the outer cap 7 begins to swell and expand. The gap between the outer cap 7 and the main covering 1 is squeezed and begins to become smaller, so as to increase the sealing between the branch covering 4 and the main covering 1 to prevent Bleeding occurs, and then the blood in the cavity 9 coagulates, changing from a flowing liquid state to an immobile gel state. The cavity 9 is filled with the coagulated blood, blocking the discontinuous sutures to avoid further blood leakage. The cavity 9 To provide space for blood, the outer cap 7 is pushed up by blood coagulation to form a blocking layer to avoid blood leakage. The outer cap 7 limits the position of the blood after coagulation and increases the volume of the cavity 9 .

The invention introduces an anti-leakage stent system for aortic arch branches. The inner cap 8 and the main coating 1 are intermittently sutured together. Slowing down the speed of blood leakage, blood enters the cavity 9, causing the outer cap 7 to expand and expand, so that the volume of the cavity 9 becomes larger. The outer cap 7 further prevents blood leakage through continuous sutures. As time changes, the cavity 9 is filled The blood changes from a liquid flow state to a non-flowable gel state, blocking the suture gap of the inner cap 8 to avoid further bleeding.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outside", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the intended direction or positional relationship. The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of the invention.

The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (8)

1. An aortic arch part branch anti-leakage stent system, which is characterized in that: the device comprises a main coating (1) and a branch coating (4), wherein the main coating (1) is communicated with the branch coating (4);

the end part of the branch coating film (4) is connected with an outer cap (7) and an inner cap (8), a cavity (9) is formed between the outer cap (7) and the inner cap (8), and the outer cap (7) and the inner cap (8) are both sewed on the inner wall of the main coating film (1);

the outer cap (7) is continuously sewn on the inner wall of the main coating film (1) through a suture, the inner cap (8) is intermittently sewn on the inner wall of the main coating film (1) through a suture, the outer cap (7) adopts a horn-shaped structure, and the opening area of the outer cap (7) is smaller than that of the inner cap (8);

the connecting part of the branch coating film (4) and the main coating film (1) is provided with a round hole, the outer cap (7) and the inner cap (8) are connected through a partition board, a plurality of partition boards are arranged in the cavity (9), and the cavity (9) is divided into a plurality of small cavities.

2. An aortic arch branch leak-proof stent system as defined in claim 1, wherein: the inner wall of one end of the branch coating film (4) is provided with a plurality of frameworks (6), the frameworks (6) adopt one of polygonal or circular structures, the length of the frameworks (6) is 150-200 mm, and the frameworks (6) extend from the branch coating film (4) to the side part of the inner cap (8).

3. An aortic arch branch leak-proof stent system as defined in claim 1, wherein: the inner wall of the other end of the branch coating film (4) is provided with branch supporting frames (5), the branch supporting frames (5) are provided with a plurality of groups, each group is divided into one group, two branch supporting frames (5) in one group or a plurality of groups are symmetrically arranged, the rest branch supporting frames (5) are distributed at equal intervals, and the branch supporting frames (5) are of annular wavy structures.

4. A leakage-proof stent system for aortic arch branches as claimed in claim 3, wherein: the inner wall of the branch tectorial membrane (4) is provided with branch reinforcing ribs (10), the branch reinforcing ribs (10) are provided with a plurality of branch reinforcing ribs, and each branch reinforcing rib (10) penetrates through the branch support frame (5).

5. An aortic arch branch leak-proof stent system as defined in claim 1, wherein: the inner wall of the main tectorial membrane (1) is provided with a plurality of groups of main support frames (2), each group is divided into two groups, two main support frames (2) in one group or a plurality of groups are symmetrically arranged, one or a plurality of branch tectorial membranes (4) are arranged in the two symmetrical main support frames (2), one branch tectorial membrane (4) is arranged between the other two main support frames (2), and the main support frames (2) are of annular wavy structures.

6. An aortic arch part branch leak-proof stent system as defined in claim 5, wherein: the inner wall of main tectorial membrane (1) is equipped with main strengthening rib (3), main strengthening rib (3) are equipped with a plurality ofly, every main strengthening rib (3) all pass main support frame (2).

7. An aortic arch branch leak-proof stent system as defined in claim 1, wherein: the aortic arch part branch anti-seepage bracket system is integrally made of polytetrafluoroethylene.

8. An aortic arch branch leak-proof stent system as defined in claim 1, wherein: the length of the main coating film (1) is 80-240 mm, and the diameter is 30-45 mm.