CN213910720U - Trachea support - Google Patents

Abstract

The utility model relates to a trachea bracket, which comprises a bracket main body and a plurality of bulges, wherein the bracket main body is provided with a metal tube net structure with a near end extending to a far end; the protrusion is arranged on the outer wall of the bracket body. The outside convex bump of surface formation at tracheal stent places tracheal stent in patient's trachea, and the frictional force of tracheal stent and tracheal stent is increased in the existence of bump, and tracheal stent fixes and can not shift in the air flue, effectively solves the problem that tracheal stent shifted in clinical.

Description

Trachea support

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a tracheal stent.

Background

The stent is implanted into the tracheobronchial tube to prop open the narrow airway to the normal size, so that the respiratory condition of a patient with tracheobronchial stenosis can be effectively improved, and the implantation of the stent is a main treatment mode for relieving or eliminating dyspnea at present.

The stent may be largely classified into a metal stent and a silicone stent according to the material of the stent. Metal stents are further classified into covered metal stents and uncovered bare stents. The metal bare stent is prepared by weaving, welding or cutting a stent main body with memory performance, and the film-covered metal stent is prepared by covering a layer of biocompatible film (generally a silica gel or polyurethane material) on the stent main body after the stent main body with memory performance is prepared by weaving, welding or cutting. The metal structure of the metal bracket is relatively stable and is widely applied clinically. However, the existing metal stent has the disadvantage that the stent is easy to shift according to clinical feedback.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tracheal stent for solve the problem that metal support shifted among the prior art.

The utility model provides a trachea bracket, which comprises a bracket body and a plurality of bulges, wherein the bracket body is provided with a metal tube net structure with a near end extending to a far end; the protrusion is arranged on the outer wall of the bracket body.

Further, the tracheal stent also comprises an inner membrane, and the inner membrane is closely attached to the inner surface of the stent body.

Further, the tracheal stent further comprises an outer membrane, the outer membrane tightly covers the stent body and the outer surface of the protrusion, and the protrusion jacks up the outer membrane to enable the outer surface of the tracheal stent to form convex points protruding outwards.

Further, the tracheal stent still includes inner membrance and adventitia, the inner membrance closely pastes and covers the internal surface of support body, the adventitia closely covers the support body with bellied surface, protruding jack-up the adventitia makes tracheal stent surface forms outside convex bump.

Further, the distal end of the inner membrane is hermetically connected with the distal end of the outer membrane, and the distal end of the stent body is wrapped between the inner membrane and the outer membrane.

Further, the inner membrane and the outer membrane are glued to the stent body and the protrusion.

Further, the inner membrane and the outer membrane are silica gel membranes, polyurethane membranes or nylon membranes.

Further, the thicknesses of the inner membrane and the outer membrane are respectively 0.01 mm-0.15 mm.

Further, the protrusions are disposed at intersections of the tube network of the stent body.

Further, the shape of the bulge is at least one of a hemisphere, a cylinder, a cone and an irregular polyhedron.

The utility model provides a tracheal stent includes support body and a plurality of arch, and the support body is tubular metal resonator network structure, protruding evenly distributed is convex to the support body outside on the outer wall of support body. This embodiment forms outside convex bump through the surface at tracheal stent, increases tracheal stent and tracheal stent's frictional force, and tracheal stent fixes and can not shift in the air flue, has effectively solved the problem that tracheal stent shifted in clinical.

Drawings

FIG. 1 is a schematic structural view of a tracheal stent in a first embodiment;

FIG. 2 is a schematic view of the tracheal stent of FIG. 1 from another perspective;

FIG. 3 is a schematic structural view of a tracheal stent in a second embodiment;

FIG. 4 is a schematic structural view of a tracheal stent in a third embodiment;

FIG. 5 is a schematic structural view of a tracheal stent in a fourth embodiment;

FIG. 6 is a schematic view of the tracheal stent of FIG. 5 from another perspective;

FIG. 7 is a schematic cross-sectional view of the tracheal stent of FIG. 6 taken along line I-I;

FIG. 8 is a schematic view of the structure of the tracheal stent during the manufacturing process;

FIG. 9 is another schematic view of the structure of the tracheal stent during the manufacturing process;

fig. 10 is a schematic view of another structure of the tracheal stent in the manufacturing process.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

For implanted medical devices, "proximal" refers to the end closer to the operator and "distal" refers to the end further from the operator.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example one

Referring to fig. 1-2, a first embodiment of the present invention provides a tracheal stent, which comprises a stent main body 111 and a protrusion 112, wherein the stent main body 111 has a metal tube net structure extending from a proximal end to a distal end, and the protrusion 112 is uniformly distributed on the outer wall of the framework body 111 and protrudes out of the stent main body 111. The outer wall of the support main body of the tracheal support is provided with the bulge protruding outwards, so that the friction force between the tracheal support and the trachea is increased, the tracheal support cannot shift in an air passage, and the problem of shifting of the tracheal support in clinic is effectively solved.

In this embodiment, the stent body 111 is a mesh tubular structure formed by weaving metal wires, and the protrusions 112 are arranged at the intersections of the mesh tubular structure. On one hand, the bulge 112 is contacted with two metal wires at the same time, so that the bulge 112 is fixed more firmly; on the other hand, the intersection point of the two wires is fixed by the protrusion 112, and the net structure of the stent main body 110 is more stable.

In another alternative embodiment of the present invention, the bracket body 111 is cut from metal.

In this embodiment, the protrusion 112 is a metal anchor, and the shape of the anchor is a post. Besides the function of preventing the tracheal stent from shifting, the metal anchor can also enhance the developing function of the tracheal stent. After the tracheal stent is implanted into a human body, the tracheal stent with strong developing function is more easily captured by an imaging device.

In another alternative embodiment of the present invention, the protrusion 112 is formed by injection molding of plastic material, and the shape of the protrusion 112 may be a hemisphere, a cone, an irregular polyhedron, or the like.

Example two

Referring to fig. 3, a second embodiment of the present invention provides a tracheal stent. The difference from the first embodiment described above is that the gas tube holder in this embodiment includes a holder main body 211, a protrusion 212, and an inner membrane 221. The stent main body 211 is provided with a metal tube net structure extending from the proximal end to the distal end, the protrusions 212 are uniformly distributed on the outer wall of the stent main body 211 and protrude to the outer side of the stent main body 211, and the inner membrane 221 is attached to the inner surfaces of the stent main body 211 and the protrusions 212.

In the embodiment, the inner surface of the stent main body in the tracheal stent is coated with the inner membrane, so that the phenomenon that the secretion is hung on the stent main body of the tracheal stent after the tracheal stent is implanted into a human body and the lumen of the tracheal stent is blocked can be effectively avoided.

EXAMPLE III

Referring to fig. 4, a third embodiment of the present invention provides a tracheal stent. The difference from the first and second embodiments described above is that the air duct support in this embodiment includes a support main body 311, a projection 312, and an outer film 322. The stent main body 311 has a metal tube mesh structure with a proximal end extending to a distal end, the protrusions 312 are uniformly distributed on the outer wall of the stent main body 311 and protrude out of the stent main body 311, the outer membrane 322 covers the outer surfaces of the stent main body 311 and the protrusions 312, and the protrusions 312 jack up the outer membrane 322, so that the outer surface of the tracheal stent forms outward protruding bumps. The outer membrane 322 completely covers the outer surfaces of the stent main body 311 and the bulge 312, and the metal stent main body 311 and the bulge 312 are not in direct contact with the tracheal wall, so that restenosis caused by granulation growth and proliferation due to stimulation of the tracheal wall by metal materials can be avoided.

Example four

Referring to fig. 5 to 7, a fourth embodiment of the present invention provides a tracheal stent. The difference from the first to third embodiments described above is that the gas tube stent in this embodiment includes a stent main body 411, a protrusion 412, and a covering film 420 including an inner film 421 and an outer film 422. The stent main body 411 has a metal tube net structure extending from the proximal end to the distal end, and the protrusions 412 are uniformly distributed on the outer wall of the stent main body 411 and protrude to the outer side of the stent main body 411. The inner membrane 421 is closely attached to the inner surface of the stent main body 411, the outer membrane 422 is closely covered on the outer surfaces of the stent main body 411 and the bulge 412, the bulge 412 jacks up the closely covered outer membrane 422, and a convex point protruding outwards is formed on the outer surface of the tracheal stent.

In this embodiment, the protruding bump that becomes outside protruding newly at the tracheal stent surface in the support main part has increased the frictional force between tracheal stent and trachea, solves the problem that tracheal stent shifted. Meanwhile, the inner surface and the outer surface of the support main body and the bulges are respectively covered with the covering film, so that secretions can be prevented from being hung on the support main body of the tracheal support, the lumen of the tracheal support is blocked, and the restenosis caused by the growth and proliferation of the granulation due to the stimulation of the tracheal wall by metal materials can be avoided.

A cylindrical raw material for the film is divided into a front section and a rear section, the front section is used as a base, and the rear section is sleeved with a turning surface on the outer surface of the front section to form the film 420 in the embodiment. The outside of the coating 420 (the latter stage of the coating material) is an outer film 422, and the inside of the coating 420 (the former stage of the coating material) is an inner film 421. The outer diameter of the graft material is slightly smaller than the inner diameter of the stent body 410, and the graft material has elasticity. The stent main body 411 and the protrusion 412 are placed between the inner membrane 421 and the outer membrane 422 of the tectorial membrane, and the inner membrane 421 and the outer membrane 422 wrap the stent main body 411 and the protrusion 412 to form a cavity. An adhesive is injected into the cavity to adhere the stent main body 411 and the protrusion 412 to the covering film 420. One end of a coating 420 formed by the coating material in a sleeved mode is closed, the adhesive is injected into the cavity from the opening of the coating 420, the phenomenon that the adhesive leaks from the other end cannot occur, the adhesive is fully injected, the stent main body 411 and the protrusion 412 are tightly combined with the coating, and the stent main body 411 and the protrusion 412 are prevented from falling off.

It should be noted that, in each of the above embodiments, the material of the outer membrane and the inner membrane is generally made of a biocompatible polymer material, such as a solid silicone membrane, a liquid silicone membrane, a polyurethane membrane, a PVC membrane, a nylon membrane, or the like. The thickness of the outer membrane and the thickness of the inner membrane are respectively 0.01 mm-0.15 mm. In order to ensure the coating effect, the thickness of the outer membrane or the inner membrane is reduced as much as possible, so that the tracheal stent has a larger inner diameter under the same outer diameter, and the cross section of the tracheal stent implanted with the tracheal stent for air flow to pass through is increased.

In addition, referring to fig. 8 to 10, a manufacturing process of the tracheal stent according to the fifth embodiment of the present invention is as follows:

(1) preparation of stent body

The metal with memory property is made into a reticular stent body by cutting, weaving, welding and other modes, and the framework body is tubular.

B. Preparation of bumps

The protrusions are anchors in the shapes of hemispheroids, columns, cones, irregular polyhedrons and the like. The metal anchor nail is processed by a metal machine, or the plastic anchor nail is made by plastic injection molding. The main function of the bulge is to provide a fixing function for the tracheal stent. The metal anchor may also provide a visualization function.

(2) Preparation of the coating film

The cylindrical tubular film with the thickness of 0.02-0.1mm is obtained by adopting materials such as solid silica gel or polyurethane and the like through a film making process. The outer diameter of the coating is 0.1-0.5mm smaller than the inner diameter of the framework body.

(3) Film coating

As shown in fig. 8, a covering film with a length more than twice that of the stent main body is taken, and the skeleton body 511 is sleeved outside the covering film 120 (the outer diameter of the covering film is slightly smaller than the stent main body). Then, the mandrel 200 is inserted into the tube of the coating film 520, and the coating film 520 is spread and flattened (as shown in fig. 9). Then, the protrusions 512 are bonded to the outer wall of the frame body 511 (as shown in fig. 10, the shape, number and position of the protrusions on the outer wall of the frame body can be adjusted according to the specific situation of the product). After the projection 512 is bonded and fixed to the holder body 511, the mandrel 200 is withdrawn. The stent main body 511, the protrusions 512 and the coating 520 sleeved therein are placed in a low-temperature environment to be softened, the stent main body 511 contracts in the low-temperature environment, and the coating 520 is folded along the port of the stent main body 511 and then sleeved on the outer surface of the stent main body 511. The coating 520 is referred to as an inner film 522 contacting the inner wall of the stent body 511, and is referred to as an outer film 521 contacting the outer wall of the stent body 511. The stent body 511 and the protrusions 512 are completely covered by the inner membrane 521 and the outer membrane 522 of the graft 520 (as shown in fig. 1).

(4) Glue injection

The adhesive is injected into the cavity formed by the inner film 521 and the outer film 522 through a smooth long tube with certain flexibility, and is fully contacted with the bracket main body 511.

(5) Shaping

The mandrel 200 is slowly passed through the tracheal stent and the coating 520 is adjusted so as not to wrinkle. Since the inner diameter of the core rod 200 is the same as the inner diameter of the stent body 511, the coating film can be spread and rolled out. Meanwhile, the adhesive is uniformly rolled under the action of pressure, the core rod 200 is taken down after the adhesive is cured, and the redundant film 520 is trimmed, so that the tracheal stent shown in fig. 1 can be prepared.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (9)

1. A tracheal stent is characterized by comprising a stent body and a plurality of bulges, wherein the stent body is provided with a metal tube net structure extending from a proximal end to a distal end, and the metal tube net structure is formed by weaving metal wires; the protrusions are provided with anchor nail structures, are made of metal or formed by injection molding of plastic materials, are arranged on the outer wall of the support body and are positioned at the crossing positions of the two metal wires of the net structure of the support body.

2. The tracheal stent of claim 1, further comprising an inner membrane that fits snugly against an inner surface of the stent body.

3. The tracheal stent of claim 1, further comprising an outer membrane closely covering the stent body and the outer surface of the protrusion, wherein the protrusion jacks up the outer membrane to form a convex point protruding outwards on the outer surface of the tracheal stent.

4. The tracheal stent of claim 1, further comprising an inner membrane and an outer membrane, wherein the inner membrane is closely attached to the inner surface of the stent body, the outer membrane is closely attached to the outer surface of the stent body and the protrusion, and the protrusion jacks up the outer membrane to form a convex point protruding outwards on the outer surface of the tracheal stent.

5. The tracheal stent of claim 4, wherein the distal end of the inner membrane is in sealed connection with the distal end of the outer membrane and encases the stent body distal end between the inner membrane and the outer membrane.

6. The tracheal stent of claim 4, wherein the inner membrane and the outer membrane are glued to the stent body and the protrusion.

7. The tracheal stent of claim 4, wherein the inner membrane and the outer membrane are silicone, polyurethane, or nylon membranes.

8. The tracheal stent of claim 7, wherein the inner membrane and the outer membrane each have a thickness of 0.01mm to 0.15 mm.

9. The tracheal stent of claim 1, wherein the protrusion is in the shape of at least one of a hemisphere, a cylinder, a cone, and an irregular polyhedron.

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