Hidden particle coated esophageal stent

Abstract

The utility model discloses a hidden particle film-covered esophageal stent which comprises a cylindrical stent body, radioactive particles and a film-covered sleeve matched with the stent body. One or more particle mounting channels are arranged on the peripheral side of the support body in the circumferential direction, and each particle mounting channel extends in the axial direction and is inwards concaved in the outer surface of the support body; one or more particle mounting positions are arranged in each particle mounting channel, the particle mounting positions are used for adding radioactive particles, and after the radioactive particles are mounted in the particle mounting positions, the radioactive particles do not protrude out of the outer surface of the support body; after the radioactive particles are installed on the stent body, the covered sleeve is sleeved on the periphery of the stent body. According to the esophageal stent implantation device, the esophageal wall or a tumor can be prevented from being pressed and directly injured when the esophageal stent is implanted, the esophageal stent can be taken out, and the esophageal mucosa cannot be damaged when the esophageal stent is taken out.

Description

Technical Field

[0001] The utility model relates to the technical field of esophageal stents, in particular to a hidden particle-coated esophageal stent. Background Art

[0002] Conventional particle-carrying esophageal stents are made by adding radioactive particles to the wall of conventional esophageal stents, thereby producing a dual therapeutic effect (the stent keeps the esophagus unobstructed, and the particles treat the tumor). However, since the particles protrude from the smooth surface of the stent, there are the following disadvantages:

[0003] 1. It causes compression and trauma to the esophageal wall or tumor, and the patient will experience more obvious pain than conventional esophageal stents, bringing new pain;

[0004] 2. Since the half-life of radioactive particles is reached 2 months after stent implantation, particles are often partially embedded in the esophageal wall during this period. It is more difficult to remove the stent than with conventional covered stents and the risks are significantly increased, including esophageal bleeding, rupture and scratches, etc. Therefore, currently, esophageal stents with portable particles are basically not removed after implantation. Utility Model Content

[0005] In order to solve the problems in the prior art, the utility model provides a hidden particle-coated esophageal stent, which can not only avoid compression and direct trauma to the esophageal wall or tumor when the esophageal stent is implanted, but also can remove the esophageal stent without damaging the esophageal mucosa.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A hidden particle-coated esophageal stent comprises a cylindrical stent body, radioactive particles, and a coating sleeve matched with the stent body;

[0008] One or more particle installation channels are arranged in a circumferential direction on the outer peripheral side of the stent body, and each particle installation channel extends in the axial direction and is concave inwardly on the outer surface of the stent body;

[0009] One or more particle installation positions are arranged in each particle installation channel, and the particle installation positions are used to install radioactive particles: after the radioactive particles are installed in the particle installation positions, the radioactive particles do not protrude from the outer surface of the stent body;

[0010] After the radioactive particles are installed in the stent body, the coating sleeve is arranged on the periphery of the stent body.

[0011] Preferably, the cross section of the support body is a multi-petal flower shape, and particle installation channels are formed between the petals.

[0012] Preferably, the bracket body is made by a weaving process.

[0013] The stent body is a self-expanding structure.

[0014] Preferably, the particle mounting positions are arranged at intervals along the axial direction in the particle channel.

[0015] Preferably, the particle mounting location is a mounting bag that matches the radioactive particles.

[0016] Preferably, the coating sleeve is a polyvinyl alcohol coating.

[0017] Preferably, the coating sleeve is tightly fitted with the stent body, and the two are detachably connected.

[0018] Preferably, the axial length of the coating sleeve matches that of the stent body.

[0019] Beneficial effects of the utility model:

[0020] 1. In the utility model, the radioactive particles do not protrude from the surface of the stent body after installation, so the particles can still adhere to the esophageal mucosa without causing compression and direct trauma.

[0021] 2. The utility model realizes the function of taking out the esophageal stent, and a coating sleeve is provided outside the stent body and the radioactive particles, so that the esophageal mucosa will not be damaged when the esophageal stent is taken out.

[0022] 3. The main body of the bracket in the utility model is a multi-petal flower shape made by weaving technology, which has a simple structure and is easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side view of the utility model.

[0024] Figure 2 It is the front view of the utility model.

[0025] Figure 3 It is a schematic diagram of the installation process of the utility model.

[0026] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0027] The following is a detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention. Figure 1 and Figure 2 In order to conveniently display the structure of the utility model, the film sleeve 3 is hidden.

[0028] Embodiment 1:

[0029] like Figure 1 and Figure 2 As shown, this embodiment discloses a hidden particle-coated esophageal stent, including a cylindrical stent body 1, radioactive particles 2, and a coating sleeve 3 matched with the stent body.

[0030] Four particle installation channels 4 are arranged in a circumferential direction on the outer peripheral side of the stent body 1 . Each particle installation channel 4 extends in the axial direction and is recessed inwardly on the outer surface of the stent body 1 .

[0031] Specifically, the stent body 1 is made by a weaving process. The cross section of the stent body 1 is a four-petal flower shape, and a particle installation channel 4 is formed between adjacent petals. The stent body 1 is a self-expanding structure (the self-expanding structure is a prior art, and the existing esophageal stents mostly adopt the self-expanding structure, which will not be described in detail in this embodiment), and the material is an alloy material, including but not limited to nickel-titanium alloy and aluminum-magnesium alloy.

[0032] In this embodiment, there are four particle installation channels 4. In other embodiments, the particle installation channels 4 can be any number as needed.

[0033] Each particle installation channel is provided with a plurality of particle installation positions arranged at intervals along the axial direction, and the particle installation positions are used to install radioactive particles 2. After the radioactive particles 2 are installed in the particle installation positions, the radioactive particles 2 do not protrude from the outer surface of the stent body.

[0034] In the utility model, the radioactive particles do not protrude from the surface of the stent body after installation, so the particles can still adhere to the esophageal mucosa without causing compression and direct trauma.

[0035] Specifically, the particle installation position is an installation bag that matches the radioactive particles. The installation bag is connected to the support body 1, and the radioactive particles 2 are loaded into the corresponding installation bag.

[0036] After the radioactive particles are installed in the stent body, the coating sleeve 3 is sleeved on the outer periphery of the stent body 1. Specifically, the coating sleeve 3 is coated with polyvinyl alcohol.

[0037] The coating sleeve 3 is tightly matched with the stent body 1, and the two are detachably connected. The axial length of the coating sleeve 3 matches that of the stent body 1.

[0038] In the utility model, a coating sleeve is arranged outside the stent body 1 and the radioactive particles 2, so that the esophageal mucosa will not be damaged when the esophageal stent is taken out.

[0039] Embodiment 2:

[0040] like Figure 3 As shown, this embodiment discloses an assembly method of a hidden particle-coated esophageal stent, based on the hidden particle-coated esophageal stent of embodiment 1, comprising the following steps:

[0041] (1) Prepare the stent body 1, radioactive particles 2 and the coating sleeve 3; the stent body 1 is now in the following state: Figure 3 As shown in (a).

[0042] (2) The radioactive particles 2 are installed at the particle installation positions of each particle installation channel 4, and all the radioactive particles 2 do not protrude from the surface of the stent body; Figure 3 As shown in (b).

[0043] (3) A coating sleeve 3 is provided on the outer periphery of the stent body 1; Figure 3 As shown in (c).

[0044] The utility model can not only avoid compression and direct trauma to the esophageal wall or tumor when the esophageal stent is implanted, but also can remove the esophageal stent without damaging the esophageal mucosa when the esophageal stent is removed.

[0045] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0046] If the words "first", "second" and so on are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A hidden particle-coated esophageal stent, characterized in that: It includes a cylindrical stent body, radioactive particles, and a coating sleeve matched with the stent body; One or more particle installation channels are arranged in a circumferential direction on the outer peripheral side of the stent body, and each particle installation channel extends in the axial direction and is concave inwardly on the outer surface of the stent body; One or more particle installation positions are arranged in each particle installation channel, and the particle installation positions are used to install radioactive particles: after the radioactive particles are installed in the particle installation positions, the radioactive particles do not protrude from the outer surface of the stent body; After the radioactive particles are installed in the stent body, the coating sleeve is arranged on the periphery of the stent body.

2. The hidden particle-coated esophageal stent according to claim 1, characterized in that: The cross section of the support body is a multi-petal flower shape, and a particle installation channel is formed between the petals.

3. The hidden particle-coated esophageal stent according to claim 1 or 2, characterized in that: The support body is made through a weaving process.

4. The hidden particle-coated esophageal stent according to claim 3, characterized in that: The stent body is a self-expanding structure.

5. The hidden particle-coated esophageal stent according to claim 1, characterized in that: The particle installation positions are arranged at intervals along the axial direction in the particle channel.

6. The hidden particle-coated esophageal stent according to claim 1 or 5, characterized in that: The particle installation position is an installation bag that matches the radioactive particles.

7. The hidden particle-coated esophageal stent according to claim 1, characterized in that: The film sleeve is a polyvinyl alcohol film.

8. The hidden particle-coated esophageal stent according to claim 1 or 7, characterized in that: The coating sleeve is tightly matched with the stent body, and the two are detachably connected.

9. The hidden particle-coated esophageal stent according to claim 8, characterized in that: The axial length of the coating sleeve matches that of the stent body.

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