Support

Abstract

The utility model relates to the technical field of medical instruments, and provides a stent which comprises a body of a flat cylindrical structure, the body is formed by a plurality of frameworks arranged in a circular array mode, and a plugging portion and a folding portion are sequentially arranged in the radial direction of the body from outside to inside. The plugging part is parallel to the axial direction of the body, and a film layer is arranged on the outer side wall of the plugging part; when the plugging part is subjected to radial pressure, the folding part shrinks in the direction close to the center of the body, so that the outer diameter of the body is reduced; and when the plugging part is not subjected to radial pressure, the folding part extends outwards, so that the outer diameter of the body is increased. Compared with a conventional Y-shaped support, the support provided by the utility model has the advantages that the overall length of the support is reduced through the optimized design of the structure, the angle is easier to adjust in the implanting process so as to overcome a V-shaped included angle formed between a pusher and the glottis, and the technical requirements of an operator are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bracket. Background Art

[0002] Lung stenting surgery primarily involves implanting a tracheal stent for patients with air leaks, airway stenosis, or tracheal collapse. The most common existing method is a Y-shaped stent. However, these stents are relatively long, making it difficult to adjust the angle to overcome the V-shaped angle between the pusher and the glottis during implantation using a pusher, thus requiring high operator skill. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is that the overall length of the existing Y-shaped stent is relatively long. During the implantation process using a pusher, it is not easy to adjust the angle to overcome the V-shaped angle formed between the pusher and the glottis, which places high technical requirements on the operator, thereby providing a stent.

[0004] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0005] The utility model provides a stent, comprising: a main body, which is a flat cylindrical structure, and the main body is formed by a plurality of skeletons arranged in a circular array, and along the radial direction of the main body from the outside to the inside are a sealing portion and a folding portion; the sealing portion is arranged parallel to the axial direction of the main body, and the outer side wall of the sealing portion is provided with a membrane layer; when the sealing portion is subjected to radial pressure, the folding portion contracts toward the center of the main body to reduce the outer diameter of the main body; when the sealing portion is not subjected to radial pressure, the folding portion stretches outward to increase the outer diameter of the main body.

[0006] Furthermore, the folding portion includes a first folding area and a second folding area from the outside to the inside along the radial direction of the main body, and the first folding area and the second folding area are arranged at a V-shaped angle; when the blocking portion is under pressure, the V-shaped angle between the first folding area and the second folding area decreases; when the blocking portion is not under pressure, the V-shaped angle between the first folding area and the second folding area increases.

[0007] Furthermore, the first folding area is concave downward, and the second folding area is convex upward.

[0008] Furthermore, the skeleton density of the second folding zone gradually decreases from the outside to the inside along the radial direction of the body.

[0009] Furthermore, a hollow hole is left in the center of the second folding area.

[0010] Furthermore, the skeleton is made of nickel-titanium alloy.

[0011] Furthermore, the membrane layer provided on the sealing portion is a silicone film.

[0012] Furthermore, the first folding area is a concave curved surface.

[0013] Furthermore, the second folding area is an upward convex curved surface.

[0014] Furthermore, the outer diameter of the body after contraction is in the range of 2mm-4mm; the outer diameter of the body after expansion is in the range of 3mm-10mm.

[0015] The technical solution of this utility model has the following advantages:

[0016] The stent provided by the present invention is a flat cylindrical structure as a whole, and is composed of a sealing portion and a folding portion from outside to inside in the radial direction of the body; when in use, the sealing portion is compressed to cause the folding portion to shrink toward the center of the body to reduce the outer diameter of the body, and then the stent is implanted into the patient's body using a pusher; after the pusher is withdrawn, the sealing portion is no longer subjected to radial pressure, and the folding portion extends outward to increase the outer diameter of the body. At this time, the sealing portion fits the tracheal wall, and the membrane layer provided on the outer wall of the sealing portion can well block the air leakage position. Compared with conventional Y-shaped stents, the stent in this application reduces the overall length of the stent by optimizing the structure. During the implantation process, it is easier to adjust the angle to overcome the V-shaped angle formed between the pusher and the glottis, reducing the technical requirements of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a bracket in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection relationship between the first folding area and the second folding area in the bracket in one embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the membrane layer in the stent in one embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the second folding area in the bracket in one embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Sealing part; 2. First folding area; 3. Second folding area; 4. Membrane layer; 5. Skeleton; 6. Hollow hole. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figures 1 to 4As shown, this embodiment provides a stent, comprising: a body, which is a flat cylindrical structure. The body is formed by a plurality of skeletons 5 arranged in a circular array. For example, the skeleton 5 may include a plurality of main skeletons 5 arranged along the radial direction of the body and a V-shaped sub-skeleton 5 arranged between two adjacent main skeletons 5. The sealing portion 1 and the folding portion are arranged from the outside to the inside in the radial direction of the body. The sealing portion 1 is arranged parallel to the axial direction of the body, and the outer wall of the sealing portion 1 is provided with a membrane layer 4. With such an arrangement, when the stent is implanted in the body, the sealing portion 1 can be kept in close contact with the inner wall of the trachea to better block the air leakage location. Moreover, since the outer wall of the sealing portion 1 is provided with a membrane layer 4, in addition to playing a blocking role and keeping the airway unobstructed, it can also reduce the irritation of the stent to the tracheal wall and reduce the damage to the mucosa. When the sealing portion 1 is subjected to radial pressure, the folding portion contracts toward the center of the body to reduce the outer diameter of the body. When the sealing portion 1 is not subjected to radial pressure, the folding portion stretches outward to increase the outer diameter of the body.

[0029] The stent provided in this embodiment is a flat cylindrical structure as a whole, and is composed of a sealing portion 1 and a folding portion from outside to inside in the radial direction of the body; when in use, the sealing portion 1 is compressed to shrink the folding portion toward the center of the body to reduce the outer diameter of the body, and then the stent is implanted into the patient's body using a pusher; after the pusher is withdrawn, the sealing portion 1 is no longer subjected to radial pressure, and the folding portion stretches outward to increase the outer diameter of the body. At this time, the sealing portion 1 fits the tracheal wall, and the membrane layer 4 provided on the outer wall of the sealing portion 1 can well seal the leaking position. Compared with conventional Y-shaped stents, the stent in this application reduces the overall length of the stent by optimizing the structure. During implantation, it is easier to adjust the angle to overcome the V-shaped angle formed between the pusher and the glottis, reducing the technical requirements of the operator.

[0030] like Figure 2As shown, specifically, the folded portion, extending radially from the outside to the inside of the body, includes a first folded region 2 and a second folded region 3, with a V-shaped angle formed between them. When the sealing portion 1 is compressed, the V-shaped angle between the first folded region 2 and the second folded region 3 decreases; when the sealing portion 1 is uncompressed, the V-shaped angle between the first folded region 2 and the second folded region 3 increases. For example, the first folded region 2 can be concave downward, while the second folded region 3 is convex upward. For example, the first folded region 2 can also be convex upward, while the second folded region 3 is concave downward. Ultimately, by designing the first folded region 2 and the second folded region 3 one above the other, a V-shaped angle is formed between them. This facilitates adjustment of the stent outer diameter while also ensuring overall stent stability and support strength. For example, the first folded region 2 can be a concave curved surface. For example, the second folded region 3 can be a convex curved surface. For example, along the axial direction of the body, the combined lengths of the first folded region 2 and the second folded region 3 can be the same as the length of the sealing portion 1.

[0031] For example, the outer diameter of the body after contraction can range from 2mm to 4mm; the outer diameter of the body after expansion can range from 3mm to 10mm, and the overall length of the stent can be designed as needed.

[0032] The density of the skeleton 5 in the second folding area 3 gradually decreases from the outside to the inside along the radial direction of the body. This arrangement is more conducive to the stent to shrink inward smoothly.

[0033] like Figure 4 As shown, a hollow hole 6 is left in the center of the second folding area 3. The hollow hole 6 can not only allow general gas to flow, but also provide a certain space for the contraction of the stent.

[0034] For example, the skeleton 5 may be made of nickel-titanium alloy. When the skeleton 5 is made of a memory alloy, after the stent is released, the compressed stent can return to its original size, thereby allowing the sealing portion 1 to fit the tracheal wall.

[0035] like Figure 3 As shown, for example, the film layer 4 provided on the blocking portion 1 may be a silicone film, which may be provided on the outer wall of the blocking portion 1 through a coating process. The film layer 4 has a certain toughness and may shrink or stretch along with the stent.

[0036] When implanting a stent, the doctor first uses imaging examinations to assess the patient's airway condition and determine the size, shape, and position of the stent. Then, the appropriate model of stent is selected. The stent is usually introduced through a long, thin tube (guide tube), which can enter the airway through the mouth or nose. After reaching the predetermined position, the doctor will unfold the stent and fix it to the airway wall. After the stent is implanted, the position and stability of the stent are checked, and the operation is completed after confirming that there is no bleeding or other complications.

[0037] In summary, the stent in this application can be used for tracheal stent implantation in patients with lung leakage, airway stenosis, and tracheal collapse. Moreover, the stent is easy to implant and remove, does not require customization, is simple for doctors to operate, has a short operation time, and has a short recovery period for minimally invasive surgery. It also has good expansion capabilities and does not damage the airway mucosa. It can maintain the implanted position without moving, and will not irritate the airway mucosa, aggravate infection, and form granulomas. At the same time, it promotes drainage of the channel without inhibiting ciliary movement and the ability to clear secretions. The sealing portion is covered with a film, which can reduce irritation and damage to the bronchial mucosa, and can also play a role in plugging leaks and maintaining long-term patency of the respiratory tract.

[0038] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A bracket, characterized in that: include: The main body is a flat cylindrical structure, and the main body is formed by a plurality of skeletons (5) arranged in a circular array. Along the radial direction of the main body, from the outside to the inside, there are a sealing portion (1) and a folding portion; the sealing portion (1) is arranged parallel to the axial direction of the main body, and the outer wall of the sealing portion (1) is provided with a membrane layer (4); when the sealing portion (1) is subjected to radial pressure, the folding portion shrinks toward the center of the main body to reduce the outer diameter of the main body; when the sealing portion (1) is not subjected to radial pressure, the folding portion stretches outward to increase the outer diameter of the main body.

2. The bracket according to claim 1, wherein: The folding portion comprises a first folding area (2) and a second folding area (3) from the outside to the inside along the radial direction of the body, and the first folding area (2) and the second folding area (3) are arranged at a V-shaped angle; When the blocking portion (1) is under pressure, the V-shaped angle between the first folding area (2) and the second folding area (3) decreases; when the blocking portion (1) is not under pressure, the V-shaped angle between the first folding area (2) and the second folding area (3) increases.

3. The bracket according to claim 2, characterized in that The first folding area (2) is concave downward, and the second folding area (3) is convex upward.

4. The bracket according to claim 2, characterized in that The density of the skeleton (5) of the second folding area (3) gradually decreases from the outside to the inside along the radial direction of the body.

5. The bracket according to claim 2, wherein: A hollow hole (6) is left at the center of the second folding area (3).

6. The bracket according to claim 1, wherein: The skeleton (5) is a skeleton (5) made of nickel-titanium alloy.

7. The bracket according to claim 1, wherein: The membrane layer (4) provided on the blocking portion (1) is a silicone film.

8. The bracket according to claim 3, characterized in that The first folding area (2) is a concave curved surface.

9. The bracket according to claim 3, characterized in that The second folding area (3) is an upward convex curved surface.

10. The bracket according to claim 1, wherein: The outer diameter of the body after shrinkage is in the range of 2mm-4mm; The outer diameter of the expanded body ranges from 3 mm to 10 mm.

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