Support

Abstract

The utility model discloses a stent which is applied to an airway or an esophagus and comprises a framework and a lining film, and the framework is a tubular object which is hollow inside and provided with a mesh structure on the surface; the lining film is attached to the inner surface of the framework, a plurality of protrusions are formed on the outer wall of the lining film, the protrusions penetrate through meshes of the framework to be exposed on the outer side of the framework and are attached to the inner wall of the airway or the esophagus, and a gap is formed between the outer surface of the framework and the inner wall of the airway or the esophagus. The stent provided by the utility model not only solves the defects caused by a mesh structure of a metal bare stent, but also solves the problems that the stent is easy to displace due to low adhesive force between a membrane structure and an airway / esophagus wall, and retention is easy to cause due to the fact that the membrane obstructs the flow of secretions.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of support. BACKGROUND

[0002] Trachea, esophageal stenosis is a common disease that threatens patient's life, generally by placing stent in the trachea, esophagus of patient to treat. Current more common stent is divided into bare metal stent, covered metal stent according to whether film:

[0003] Metal bare stent, generally using stainless steel wire or nickel-titanium memory alloy wire is woven, its net structure makes airway, esophageal secretion not easy to retain, but also unable to block tumor or granulation tissue along mesh growth and lead to airway restenosis, therefore only applicable to short-term placement to relieve airway, esophageal obstruction. Metal bare stent is not easy to shift, but also cannot be taken out, so it is not suitable for treating benign diseases.

[0004] Metal covered stent, generally using silicone rubber, nylon, polyvinyl chloride, polyester material is covered on the outer wall of metal bare stent skeleton, so that the mesh structure of metal stent is covered, so that tumor or granulation tissue can be blocked along the mesh growth, reduce airway, esophageal restenosis, suitable for long-term placement, and stent is easy to take out. The disadvantage is that secretion is easy to retain on the surface of stent, increase the risk of infection, and easy to ectopic. SUMMARY

[0005] In view of the deficiencies of prior art, the utility model provides a kind of support, both solve the drawbacks of metal bare stent due to mesh structure, also solve the problem that the adhesion of film structure and airway / esophagus wall is not high, easy to cause stent easy to shift, and film hinders the flow of secretion, easy to cause retention.

[0006] The utility model discloses the following technical scheme realizes:

[0007] A kind of support, applied to airway or esophagus, comprising:

[0008] Skeleton, the skeleton is the tubular object with mesh structure on surface in hollow inside;

[0009] Inner lining film, the inner lining film is attached to the inner surface of the skeleton, and the outer wall of the inner lining film is formed with a plurality of protrusions, the protrusions are exposed outside the skeleton through the mesh of the skeleton and are combined with the inner wall of the airway or esophagus, wherein the outer surface of the skeleton and the inner wall of the airway or esophagus form a gap.

[0010] Further, a plurality of the protrusions are evenly distributed on the outer circumferential surface of the inner lining film.

[0011] Further, the outer circumferential surface of the protrusion is in interference abutment with the inner circumferential wall of the mesh hole.

[0012] Further, the protrusion is integrally formed with the inner lining film and the protrusion is in a cylindrical shape.

[0013] Further, the thickness of the portion of the protrusion exposed outside the framework is 1-1.5 mm.

[0014] Further, the outer wall of the inner lining film covers the projection of the mesh hole of the framework on the outer wall of the inner lining film.

[0015] Further, the material of the inner lining film is silicone rubber.

[0016] Further, the axial end portion of the inner lining film exceeds the axial end portion of the framework by 1-1.5 mm.

[0017] Further, the inner wall of the inner lining film is a smooth surface.

[0018] Further, the framework comprises a main body portion and expansion portions formed at both ends of the main body portion, the diameter of the expansion portion is greater than the diameter of the main body portion by 2-2.5 mm, and the axial length of the expansion portion is 5-6 mm.

[0019] Compared with the prior art, the advantages of the present application are that:

[0020] By setting the inner lining film to be attached to the inner surface of the framework, the growth of the tumor or granulation tissue along the mesh structure to cause restenosis of the airway or esophagus is blocked, so that the short-term and long-term patients are applicable, and the situation that the pure metal stent cannot be taken out is avoided. In addition, the protrusions on the inner lining film can increase the friction between the airway and the esophagus wall, so that the stent is not easy to move, and by setting the protrusions, there is a gap between the stent and the airway and esophagus wall, so that it is not easy to cause secretion retention, and the risk of infection is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the stent;

[0022] Figure 2 is a front view of the stent.

[0023] 1, framework; 10, mesh hole; 2, inner lining film; 20, protrusion; 3, main body portion; 4, expansion portion. DETAILED DESCRIPTION

[0024] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] like Figure 1 As shown, a stent according to one embodiment of this utility model, applied in the airway or esophagus, mainly includes a skeleton 1 and an inner liner 2. The skeleton 1 is a hollow tubular structure with a mesh structure on its surface. The inner liner 2 is attached to the inner surface of the skeleton 1, and the outer wall of the inner liner 2 has multiple protrusions 20. The protrusions 20 pass through the mesh 10 of the skeleton 1, are exposed on the outside of the skeleton 1, and fit against the inner wall of the airway or esophagus, so that a gap is formed between the outer surface of the skeleton 1 and the inner wall of the airway or esophagus. By setting the inner liner 2 to be attached to the inner surface of the skeleton 1, it can prevent tumors or granulation tissue from growing along the mesh structure and causing restenosis of the airway or esophagus. This makes it suitable for both short-term and long-term patients and avoids the situation where pure metal stents cannot be removed. In addition, the protrusions 20 on the inner liner 2 can increase the friction between the stent and the airway or esophagus wall, making the stent less prone to displacement. Furthermore, by setting the protrusions 20, a gap is formed between the stent and the airway or esophagus wall, thus reducing the risk of secretion retention and infection.

[0026] In this embodiment, multiple protrusions 20 are evenly distributed on the outer peripheral surface of the inner liner membrane 2. By setting multiple protrusions 20, the friction between the support and the airway or esophageal wall is increased, ensuring that the contact between the entire support and the airway or esophageal wall is more stable and preventing the support from shifting in the airway or esophagus.

[0027] In this embodiment, the outer peripheral surface of the protrusion 20 is in interference fit with the inner peripheral wall of the mesh 10, making the connection between the skeleton 1 and the inner liner 2 more stable and preventing the inner liner 2 from falling off.

[0028] In this embodiment, the protrusions 20 are integrally formed with the inner lining film 2 and are cylindrical, but can also be rectangular or other shapes, and the shape can be customized according to the actual needs of the patient.

[0029] In this embodiment, the thickness of the part of the protrusion 20 exposed outside the framework 1 is 1-1.5 mm.

[0030] The outer wall of the inner lining film 2 covers the projection of the mesh 10 of the framework 1 on the outer wall of the inner lining film 2, avoiding the growth of tumor or granulation tissue along the mesh 10 to cause restenosis of the airway or esophagus, making it suitable for short-term and long-term patients.

[0031] The material of the inner lining film 2 is preferably silicone rubber.

[0032] The inner wall of the inner lining film 2 is a smooth surface, which is beneficial to the flow of substances.

[0033] The axial end of the inner lining film 2 exceeds the axial end of the framework 1 by 1-1.5 mm, which can reduce the stimulation of the end of the framework 1 to the mucosa on the wall of the airway or esophagus, thereby preventing the proliferation of granulation tissue.

[0034] The framework 1 is a mesh structure made of nickel-titanium memory alloy, specifically a mesh structure woven by one or more nickel-titanium memory alloy wires with a diameter of 0.2-0.3 mm. The framework 1 can be made into different diameters and shapes, has good compliance, is easy to place and remove, and the two ends of the framework 1 are provided with a recovery line to facilitate the removal of the stent.

[0035] As shown in Figure 2 The framework 1 includes a main body 3 and expansion portions 4 formed at both ends of the main body 3. The diameter of the expansion portion 4 is 2-2.5 mm larger than that of the main body 3, and the axial length of the expansion portion 4 is 5-6 mm. The expansion portion 4 and the main body 3 are smoothly transitioned, and the stent can be prevented from displacing in the airway or esophagus to a certain extent by providing the expansion portion 4. In this embodiment, the stability of the stent in the airway or esophagus is greatly improved by the double protection of the expansion portion 4 and the plurality of protrusions 20, and the displacement of the stent in the airway or esophagus is basically avoided.

[0036] In addition, the two ends of the framework 1 adopt a closed structure, i.e., the diameter of the opening at both ends of the framework 1 is smaller than the diameter of the expansion portion 4. The closed structure can prevent the end of the framework 1 from stimulating the tracheal wall to produce granulation tissue.

[0037] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A stent for use in an airway or oesophagus, characterised in that, The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube.

2. The stent of claim 1, wherein The application relates to a tracheal or esophageal intubation tube.

3. The stent of claim 1, wherein The application relates to a tracheal or esophageal intubation tube.

4. The stent of claim 1, wherein The application relates to a tracheal or esophageal intubation tube.

5. The stent of claim 1, wherein The application relates to a tracheal or esophageal intubation tube.

6. The stent defined in Claim 1, wherein, The application relates to a tracheal or esophageal intubation tube.

7. The stent defined in Claim 1, wherein, The application relates to a tracheal or esophageal intubation tube.

8. The stent defined in Claim 1, wherein, The application relates to a tracheal or esophageal intubation tube.

9. The stent of claim 1, wherein The application relates to a tracheal or esophageal intubation tube.

10. The stent defined in Claim 1, wherein, The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophageal intubation tube. The application relates to a tracheal or esophage

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