Adjustable lacrimal passage stent

Abstract

The invention relates to an adjustable lacrimal passage stent. The stent is composed of a side tube, a balloon threading tunnel, a balloon lateral expansion tube, a body stent lateral expansion tube, a valve water injection tube, a water injection needle, a balloon supporting inner container and a body stent supporting inner container. The side tube tail end is connected with the balloon lateral expansion tube which is connected with the balloon threading tunnel, the balloon lateral expansion tube is shaped like ellipsoid and wraps the outer side of the balloon supporting inner container, the balloon supporting inner container tail is connected with the body stent lateral expansion tube which is arranged on the outer side of the body stent supporting inner container in a sleeving mode, micro holes are uniformly formed in the surface of the body stent lateral expansion tube, and the body stent lateral expansion tube tail is connected with the valve water injection tube. The adjustable lacrimal passage stent has the advantages that the stent simulates the structure of a lacrimal passage and comprises a lacrimal point, a lacrimal sac and a nasolacrimal duct, the potential function of the lacrimal passage smooth muscle can be simulated, tissue edema of the lacrimal passage is not likely to be caused, blood supply of the lacrimal passage is enhanced, an inflammatory reaction of the lacrimal passage is relieved, and the effect of adjusting lacrimal passage expansion and contraction is achieved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an adjustable lacrimal duct stent. Background technique [0002] Epiphora is a common symptom of eye disease clinically, and the symptoms of tearing or epiphora are clinical manifestations of tearing, and epiphora is a special pathological state of tearing. Lachrymation, also known as secretory lacrimation and hypersecretion of lacrimal fluid, refers to the outflow of lacrimal fluid caused by the normal lacrimal duct drainage system but excessive lacrimal gland secretion. Epiphora, also known as epiphora, or lacrimation, refers to the tearing that occurs due to the obstruction of the normal lacrimal duct dredging system of lacrimal secretion. The main causes of epiphora reported in the current literature are: 1. Abnormal position and shape of the punctum, such as valgus stenosis and obstruction. 2. The lacrimal caruncle hypertrophy makes the lacrimal puncta far away fro...

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Problems solved by technology

3. Insufficiency of the lacrimal pump due to laxity and eversion of the lower eyelid

4. Conjunctival relaxation accumulates on the surface of the eyeball and the lower eyelid margin, forming pathological wrinkled walls, resulting in poor drainage of tears

[0003] For epiphora caused by lacrimal duct obstruction, lacrimal duct catheterization is often used in clinical practice, but traditional lacrimal duct stents have the following disadvantages: 1. Traditional stents can expand partially blocked lacrimal ducts in a short period of time, but often cause chron

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