CN215839703U

CN215839703U - Expandable tracheal stent

Info

Publication number: CN215839703U
Application number: CN202122381290.7U
Authority: CN
Inventors: 丁楠
Original assignee: Beijing Childrens Hospital
Current assignee: Beijing Childrens Hospital
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-02-18
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses an expandable tracheal stent, which comprises a coating and a plurality of skeletons, wherein the coating is cylindrical, the coating is provided with a plurality of through holes, the skeletons are arranged in the side wall of the coating, the skeletons are C-shaped, and the skeletons are arranged in parallel. The technical effects achieved are as follows: the covering film is cylindrical, can be better attached to the inner wall of the trachea, has small stimulation to the trachea, can reduce the formation of granulation tissues, and is easier to put into the trachea or take out of the trachea; the film is provided with a plurality of through holes, so that the film is beneficial to air passage humidification and sputum discharge, cilium movement and absorption of atomized medicine in the use process, and meanwhile, the air passage reaction can be better relieved, and the air passage edema can be reduced; a plurality of skeletons parallel arrangement each other, it is good to support the steadiness, and difficult fracture or aversion, skeleton adopt C font structure, do not form the closed loop, have expansibility, and accessible gasbag expands it in the use to adjust the support internal diameter, it is more convenient to use.

Description

Expandable tracheal stent

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an expandable tracheal stent.

Background

The trachea is a duct connecting the larynx and the lung and is composed of cartilage, muscle, connective tissue and mucous membrane; the cartilage is C-shaped cartilage rings, gaps are backward, the cartilage rings are connected through ligaments, and the gaps behind the rings are connected through smooth muscles and dense connective tissues, so that the continuous opening state is maintained. Congenital dysplasia or acquired lesions can cause tracheal stenosis, resulting in poor breathing and even life-threatening conditions for the patient. Tracheal stenosis has poor curative effect in the pure internal medicine, and once diagnosed, surgical operation treatment should be performed as early as possible. Current tracheal surgical methods include: balloon dilatation, tracheotomy anastomosis, cartilage transplantation of trachea, pericardial patch before trachea transplantation, Slide angioplasty and the like, so as to achieve anatomical correction. However, the angioplasty has long operation time, wide operation range and large wound, which is easy to cause the damage of main blood vessels, nerves, lymphatic vessels and the like around the trachea, and granuloma appears after the operation of part of children patients, causing respiratory failure. The current follow-up results show that no matter which method can lead the wound surface of the air passage to be in a sterile environment, postoperative infection, anastomotic fistula, granuloma, scar formation and other complications are more, new stenosis appears, and the long-term effect is not ideal. For the sick children, the pain of the artificial trachea stent repair needs to be relieved. With the development and maturity of the technology, more and more tracheal stents with excellent performance are developed. Nowadays, the interventional treatment of trachea diseases by using a stent is widely agreed, and compared with the excision reconstruction of a trachea, the implantation treatment of the artificial trachea stent can reduce the risk to the maximum extent and relieve the pain of children patients.

The airway stent can be divided into a metal stent and a non-metal stent according to the material. The metal stent is divided into nickel-titanium memory alloy according to the material: the device comprises a spiral wire bracket, an Ultraflex knitted sample bracket, a Wallstent reticular bracket, an Aero bracket and a stainless steel bracket, wherein the stainless steel bracket comprises a Palmaz reticular stainless steel bracket and a Gianturco-Z type stainless steel bracket. The metal stents are divided into complete covered stents, partial covered stents and bare stents according to the presence or absence of covered membranes and the number of covered membranes. The film of the covered stent is made of materials such as silicon rubber, nylon, polyvinyl chloride, terylene and the like. At present, the metal bare stent applied in China is mainly a nickel-titanium memory alloy mesh stent, and because the metal bare stent can not block tumor or granulation tissue from growing along meshes, the airway can be easily narrowed, so the metal bare stent can be placed in a short time to relieve the obstruction of the airway, and the metal bare stent is not easy to be placed for too long. The metal bare stent has the advantages of difficult displacement and difficult retention of airway secretions. The metal covered stent has wide application and can be used for both benign and malignant airway lesions. Has the advantages of long-term storage and easy taking out; the defect is that airway secretions are easy to be retained on the surface of the stent, and the chance of airway infection is increased. At present, the problems of stent displacement, granulation tissue hyperplasia, mucosa blockage, stent fracture, difficulty in secondary extraction and the like commonly exist in the implantation of the tracheal stent.

SUMMERY OF THE UTILITY MODEL

To this end, the present invention provides an expandable tracheal stent that solves the above-mentioned problems of the prior art.

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

according to a first aspect of the present invention, an expandable tracheal stent comprises a covering membrane and a plurality of skeletons, wherein the covering membrane is cylindrical, the covering membrane is provided with a plurality of through holes, the skeletons are arranged in the side wall of the covering membrane, the skeletons are C-shaped, and the skeletons are arranged in parallel.

Further, the openings of two adjacent skeletons face opposite directions.

Further, still include the recovery rope, the recovery rope sets up the one end of tectorial membrane, the both ends of recovery rope are connected respectively on the tectorial membrane.

Furthermore, both ends of the recovery rope are bonded on the film.

Further, the skeleton and the covering film are integrally formed.

Further, the through holes are uniformly formed in the coating film.

Further, the through-hole is the round hole, the diameter of through-hole is 2mm to 6 mm.

Further, the inner diameter of the coating film is 2cm to 5cm, and the wall thickness of the coating film is 2mm to 5 mm.

Further, the distance between two adjacent frameworks is 3mm to 10 mm.

Further, the framework is made of metal materials.

The utility model has the following advantages: by arranging the covering film and the plurality of skeletons, the covering film is cylindrical, can be better attached to the inner wall of the trachea, has small stimulation to the trachea, can reduce the formation of granulation tissues in the using process, and is easier to put into the trachea or take out of the trachea; the film is provided with a plurality of through holes, so that the film is beneficial to air passage humidification and sputum discharge, cilium movement and absorption of atomized medicine in the use process, and meanwhile, the air passage reaction can be better relieved, and the air passage edema can be reduced; the skeleton sets up in the lateral wall of tectorial membrane, and the skeleton is the C font, and a plurality of skeletons parallel arrangement each other supports the steadiness can be good, difficult fracture or shift, and the skeleton adopts C font structure, does not form the closed loop, has expansibility, and accessible gasbag expands it in the use to adjust the support internal diameter, it is more convenient to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic representation of the internal skeletal structure of an expandable tracheal stent according to some embodiments of the present invention.

FIG. 2 is a schematic representation of an external stent-graft structure of an expandable tracheal stent according to some embodiments of the present invention.

In the figure: 1. and 2, coating, 2, framework, 3, recovery rope, 4 and through holes.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, an expandable tracheal stent in an embodiment of the first aspect of the present invention includes a covering membrane 1 and a plurality of frameworks 2, wherein the covering membrane 1 is cylindrical, the covering membrane 1 is provided with a plurality of through holes 4, the frameworks 2 are arranged in a side wall of the covering membrane 1, the frameworks 2 are C-shaped, and the frameworks 2 are arranged in parallel.

In the above embodiments, it should be noted that the tracheal stent is preferably manufactured by 3D printing, and the specific manufacturing method is as follows: the trachea appearance of a patient is obtained through CT tomography firstly, then the normal physiological anatomical structure of the trachea is restored through data processing, the front and back diameters, the left and right diameters and the height of C-shaped cartilage and the height of ligament under the normal condition of the trachea of the patient are measured, the trachea support is manufactured by using a 3D printing forming technology after data are obtained, and the trachea support prevented from being manufactured by 3D printing is more suitable for individualized treatment.

Further, the film 1 is made of materials such as silicon rubber, nylon, polyvinyl chloride, polyurethane, terylene and the like.

The technical effects achieved by the above embodiment are as follows: by arranging the coating film 1 and the plurality of frameworks 2, the coating film 1 is cylindrical, can be better attached to the inner wall of the trachea, has small stimulation to the trachea, can reduce the formation of granulation tissues in the using process, and is easier to put into the trachea or take out of the trachea; the film 1 is provided with a plurality of through holes 4, which is beneficial to air passage humidification and sputum discharge, cilium movement and absorption of atomized medicine in the using process, and can better relieve air passage reaction and reduce air passage edema; skeleton 2 sets up in the lateral wall of tectorial membrane 1, and skeleton 2 is the C font, and a plurality of skeletons 2 parallel arrangement each other supports the steadiness can be good, is difficult for splitting or shifting, and skeleton 2 adopts C font structure, does not form the closed loop, has expansibility, and accessible gasbag expands it in the use to adjust the support internal diameter, it is more convenient to use.

Alternatively, as shown in fig. 1 and 2, in some embodiments, the openings of two adjacent frameworks 2 face in opposite directions.

In the above alternative embodiment, it should be noted that the opening width of the framework 2 is 2mm to 5 mm.

The beneficial effects of the above alternative embodiment are: the opening orientation of two adjacent skeletons 2 is opposite, and skeleton 2 is bionical trachea cartilage form itself, and 2 alternate arrangement of C font skeleton in the use for the degree of dress and the fixity between tracheal stent and the trachea are better, more accord with mechanical properties, are difficult for the fracture simultaneously, and have the expansibility.

Optionally, as shown in fig. 1 and fig. 2, in some embodiments, a recovery cord 3 is further included, the recovery cord 3 is disposed at one end of the covering film 1, and both ends of the recovery cord 3 are respectively connected to the covering film 1.

In the above alternative embodiment, it should be noted that the recycling rope 3 is made of nylon or dacron.

The beneficial effects of the above alternative embodiment are: retrieve 3 settings in the one end of tectorial membrane 1, when needs take out tracheal stent, can go on under the assistance of flexible bronchoscope, use biopsy forceps or retrieve hook and pull up retrieve 3, directly take out tracheal stent upper end shrink back, easy operation can take out tracheal stent from the trachea conveniently.

Alternatively, as shown in fig. 1 and 2, in some embodiments, both ends of the retrieval string 3 are bonded to the film 1.

In the above alternative embodiment, it should be noted that the two ends of the recycling cord 3 are respectively located at the two ends of the end diameter of the covering film 1.

The beneficial effects of the above alternative embodiment are: the two ends of the recovery rope 3 are bonded on the film 1, the connection mode is simple, and the production and the processing are convenient.

Alternatively, as shown in fig. 1 and 2, in some embodiments, the armature 2 is integrally formed with the cover film 1.

In the above alternative embodiment, it should be noted that the skeleton 2 is wrapped in the side wall of the covering film 1.

The beneficial effects of the above alternative embodiment are: skeleton 2 and tectorial membrane 1 integrated into one piece, production and processing are convenient, and skeleton 2 is firm in connection with tectorial membrane 1 simultaneously, is difficult for droing.

Alternatively, as shown in fig. 1 and 2, in some embodiments, a plurality of through holes 4 are uniformly provided on the coating film 1.

In the above optional embodiment, it should be noted that the through hole 4 is formed by processing through a laser engraving technique, and the through hole 4 may be configured as a circular hole, an elliptical hole, a rectangular hole, a diamond hole, or other shapes.

The beneficial effects of the above alternative embodiment are: a plurality of through-holes 4 evenly set up on tectorial membrane 1, in the use, more do benefit to the absorption of cilia motion and atomizing medicine.

Alternatively, as shown in fig. 1 and 2, in some embodiments, the through-hole 4 is a circular hole, and the diameter of the through-hole 4 is 2mm to 6 mm.

In the above alternative embodiments, it should be noted that the diameter of the through hole 4 may be set to 2mm, 3mm, 4mm, 5mm or 6 mm.

The beneficial effects of the above alternative embodiment are: the through hole 4 is a round hole, the diameter of the through hole 4 is 2mm to 6mm, the processing is convenient, the aperture size is moderate, and the air passage humidification and sputum discharge are facilitated.

Alternatively, as shown in fig. 1 and 2, in some embodiments, the inner diameter of the cover film 1 is 2cm to 5cm and the wall thickness of the cover film 1 is 2mm to 5 mm.

In the above alternative embodiment, it should be noted that the inner diameter of the coating 1 may be set to 2cm, 3cm, 4cm or 5cm, and the wall thickness of the coating 1 may be set to 2mm, 3mm, 4mm or 5 mm.

The beneficial effects of the above alternative embodiment are: the inner diameter of the covering film 1 is 2cm to 5cm, and can be set to different inner diameters according to the actual conditions of different patients; the wall thickness of the covering film 1 is 2mm to 5mm, and a good stabilizing effect can be provided for the framework 2.

Alternatively, as shown in fig. 1 and 2, in some embodiments, the distance between two adjacent skeletons 2 is 3mm to 10 mm.

In the above alternative embodiments, it should be noted that the distance between two adjacent frameworks 2 can be set to be 3mm, 4mm, 5mm, 6mm, 8mm or 10 mm.

The beneficial effects of the above alternative embodiment are: the distance between two adjacent skeletons 2 is 3mm to 10mm, can be better for tectorial membrane 1 provides the supporting role, is convenient for stereotype after expanding tracheal stent simultaneously.

Alternatively, as shown in fig. 1 and 2, in some embodiments, the frame 2 is made of a metal material.

In the above alternative embodiment, it should be noted that the skeleton 2 is made of nitinol.

The beneficial effects of the above alternative embodiment are: the framework 2 is made of nickel-titanium alloy materials, and is firm, durable and good in plasticity.

Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims

1. The utility model provides an expandable tracheal stent, its characterized in that, includes tectorial membrane (1) and a plurality of skeleton (2), tectorial membrane (1) is the cylinder, be equipped with a plurality of through-holes (4) on tectorial membrane (1), skeleton (2) set up in the lateral wall of tectorial membrane (1), skeleton (2) are the C font, and are a plurality of skeleton (2) parallel arrangement each other.

2. An expandable tracheal stent as claimed in claim 1, wherein the openings of two adjacent said frameworks (2) are oppositely directed.

3. An expandable tracheal stent as claimed in claim 1, further comprising a retrieval string (3), wherein the retrieval string (3) is disposed at one end of the covering membrane (1), and both ends of the retrieval string (3) are respectively connected to the covering membrane (1).

4. An expandable tracheal stent as claimed in claim 3, wherein both ends of the retrieval string (3) are bonded to the cover (1).

5. An expandable tracheal stent as claimed in claim 1, wherein the scaffold (2) is integrally formed with the cover (1).

6. An expandable tracheal stent as claimed in claim 1, wherein a plurality of said through holes (4) are uniformly provided on said membrane (1).

7. An expandable tracheal stent as claimed in claim 1, wherein the through hole (4) is a circular hole, the diameter of the through hole (4) being 2mm to 6 mm.

8. An expandable tracheal stent as claimed in claim 1, wherein the inner diameter of the membrane (1) is 2cm to 5cm and the wall thickness of the membrane (1) is 2mm to 5 mm.

9. An expandable tracheal stent as claimed in claim 1, wherein the distance between two adjacent said scaffolds (2) is 3mm to 10 mm.

10. An expandable tracheal stent as claimed in claim 1, wherein the skeleton (2) is made of a metallic material.