CN216257633U - Self-adaptive expansion lacrimal passage silica gel stent - Google Patents

Abstract

The utility model discloses a self-adaptive expansion lacrimal passage silica gel bracket which comprises a shell, a central element and a water injection hole, wherein the shell is improved liquid silicone rubber, the shell is provided with a cavity, the shell has good deformation capacity, the central element is arranged in the cavity, the central element is polyvinyl alcohol expansion sponge, the central element has strong hydrophilicity, and the water injection hole is arranged at one end of the shell and is communicated with the cavity. The self-adaptive expansion lacrimal passage silica gel stent can adjust the expansion size according to the expansion of the lacrimal sac shape, inhibit the granulation hyperplasia of surrounding tissues and improve the success rate of the operation.

Description

Self-adaptive expansion lacrimal passage silica gel stent

Technical Field

The utility model relates to the technical field of medical treatment, in particular to a self-adaptive expansion lacrimal passage silica gel stent.

Background

Lacrimal passage obstruction is a common frequently encountered disease in ophthalmology, and is frequently seen in women and old people. Dacryocystorhinostomy is a classic operation mode, and aims to directly anastomose a dacryocyst and a nasal mucosa, so that secretion and tear directly enter a middle nasal passage from the dacryocyst to eliminate a focus of suppurative dacryocyst and relieve a tear overflow phenomenon.

A silicone stent for treating lacrimal passage blockage is an implanted product in dacryocystorhinostomy, and aims to dredge or establish a new lacrimal drainage channel, but to maintain smooth lacrimal drainage, pathophysiological processes such as scar formation and inflammation after treatment of trauma need to be resisted, and the newly established cavity is not closed.

The lacrimal passage drainage tube has fixed shape and relatively larger hardness, the size of the lachrymal cavity of a human body has larger individual difference, the prior lacrimal passage bracket has the problems that the size and the shape can not be adjusted according to the size of the lachrymal cavity and the running shape of the lachrymal cavity of the human body are not matched, and the like, and can not support the novel lacrimal passage drainage channel manufactured in the operation in all directions.

Disclosure of Invention

To solve the problems in the prior art, the utility model provides a self-adaptive expansion lacrimal passage silica gel stent which can adjust the expansion size according to the form of a lacrimal sac and realize omnibearing support for a new lacrimal passage drainage channel manufactured in the operation.

The technical scheme adopted for achieving the purpose is as follows:

a self-adaptive expansion lacrimal passage silica gel stent comprises a shell, a central element and a water injection hole.

The shell is made of soft materials, the shell is provided with a cavity, and the shell has good deformability;

the central element is arranged in the cavity, the central element is made of hydrophilic material, and the central element has strong hydrophilicity;

the water injection hole is arranged at one end of the shell and communicated with the cavity.

In some embodiments, a pull tube is further provided, the pull tube being disposed at the other end of the housing and coupled to the housing.

In some embodiments, the housing is provided with an annular groove, the groove being located in the middle of the housing.

In some embodiments, the water injection hole is a circular hole and is communicated with two sides of the shell and is communicated with the cavity of the shell.

In some embodiments, the liquid silicone gel has a thickness of at least 30 microns.

In some embodiments, the housing is liquid silicone rubber.

In some embodiments, the central element is a polyvinyl alcohol expanded sponge.

The utility model has the following beneficial effects:

1. the self-adaptive expansion lacrimal passage silica gel stent can adjust the expansion size according to the form of the lacrimal sac, realizes omnibearing filling without dead angles, has the form after expansion closer to the anatomical structure of the lacrimal passage in the operation, inhibits the granulation hyperplasia of surrounding tissues as much as possible, and obviously improves the success rate of the operation.

2. The central element has high water absorbability, can absorb incision blood and tissue exudate through the water injection holes to expand, has compression hemostasis effect on the dacryocystorhinostomy during operation after expansion,

3. the water injection hole is communicated with the two sides of the shell, so that the lacrimal passage bracket is convenient to pull out.

4. The groove is designed based on the anatomical structure of the bone window in the operation, conforms to the anatomical structure of the anastomotic passage of the lacrimal sac and the nasal cavity of the human body, conforms to the structure of the bone window of the human body and is convenient to fix.

5. After the lacrimal passage stent is expanded, a certain pressure is generated on the peripheral tube wall of the nasolacrimal passage, the lacrimal passage stent is not easy to fall off, and additional fixation such as suture and the like is not needed.

Drawings

FIG. 1 is a front view of an adaptive expanding lacrimal stent according to an embodiment of the present invention;

FIG. 2 is a side view of an adaptive expanding lacrimal stent of an embodiment of the present invention;

fig. 3 is a top view of an adaptive expansion lacrimal passage silicone stent in accordance with an embodiment of the present invention.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the self-adaptive expansion lacrimal passage silica gel stent of the embodiment of the present invention includes a housing 1, a central member 2, and a water injection hole 4.

Specifically, the shell 1 is made of liquid silicone rubber, the material hardness is appropriate, the strain capacity is good, the oxygen permeability and the mechanical property are good, a groove is arranged on the shell 1, and the shape of the groove is attached to a human body bone window, which is specifically shown in fig. 1. The housing 1 has a cavity inside, and the central element 2 is located in the cavity of the housing 1. The central element 2 is polyvinyl alcohol expanded sponge which can be spherical or strip-shaped, the material is easy to cut, and the polyvinyl alcohol expanded sponge has high hydrophilicity and is uniformly expanded. One end of the shell 1 is provided with a traction tube 3, and the traction tube 3 is fixedly connected with the shell 1. The other end of the shell 1 is provided with a water injection hole 4, and the water injection hole 4 is a round hole and is communicated with the cavity of the shell 1.

The thickness of the liquid silicone rubber was 50 microns.

According to the self-adaptive expansion lacrimal passage silica gel stent disclosed by the embodiment of the utility model, the traction tube 3 is connected with the probe through the guide wire during operation, and the probe draws the self-adaptive expansion lacrimal passage silica gel stent to a preset position. At the moment, the self-adaptive expansion lacrimal passage silica gel stent can absorb blood and tissue exudates in the lacrimal passage through the water injection hole, so that the polyvinyl alcohol expansion sponge expands. If the liquid absorbed by the self-adaptive expansion lacrimal passage silica gel bracket is insufficient, the injector can be used for injecting normal saline into the cavity of the shell 1 through the water injection hole 4, the central element 2 absorbs water to expand, and the shell 1 is driven to deform. Since the central member 2 has high water absorbability, the central member 2 does not shrink after swelling. When the self-adaptive expansion lacrimal passage silica gel stent expands until the groove is fit with the human body bone window, the redundant traction tube 3 is removed, and the operation incision is sutured. When the self-adaptive expansion lacrimal passage silica gel stent is taken out, the self-adaptive expansion lacrimal passage silica gel stent can be taken out from the lacrimal sac by clamping the water injection hole 4 by using a forceps.

The problem of non-coincidence of the running forms of the lacrimal duct cavities of the human body is solved through the innovation of the material of the central element and the innovative design of the structure of the shell, and the success rate of the operation is improved.

The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the utility model and to simplify the description, and unless otherwise stated the above words are not intended to have a special meaning.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. An adaptive expansion lacrimal passage silica gel stent is characterized by comprising:

the shell is made of soft materials, the shell is provided with a cavity, and the shell has good deformability;

a central element disposed in the cavity, the central element being a hydrophilic material;

and the water injection hole is formed in one end of the shell and communicated with the cavity.

2. The self-adaptive expansion lacrimal passage silica gel stent of claim 1, further comprising a traction tube disposed at another end of the housing and connected to the housing.

3. The adaptive expansion lacrimal passage silicone stent of claim 1, wherein a groove is provided on the housing, the groove being located in a middle portion of the housing.

4. The self-adaptive expansion lacrimal passage silica gel stent of claim 1, wherein the water injection hole is a circular hole and communicates with both sides of the outer shell and communicates with a cavity of the outer shell.

5. The adaptively-expandable lacrimal stent of claim 1, wherein a thickness of the liquid silicone is at least 30 microns.

6. The adaptive expansion lacrimal passage silicone stent of claim 1, wherein the housing is liquid silicone rubber.

7. The adaptively-expandable lacrimal stent of claim 1, wherein the central element is a polyvinyl alcohol expansion sponge.

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