artificial nasolacrimal duct

Abstract

The invention discloses an artificial nasolacrimal duct which is simple in structure, capable of being led in and led out conveniently, and capable of avoiding repeated operations. The artificial nasolacrimal duct comprises an inner tube which is made of silica gel materials and a locating piece. The locating piece is arranged on the outer wall of the inner tube, and the artificial nasolacrimal duct can be supported by the locating piece to be located in a pipeline of a human body nasolacrimal duct. The inner tube is of a splicing structure of multiple channels and multiple sections. The locating piece either can be a section of spiral band which is made of degradable and expandable materials and arranged on the outer wall of the inner tube or can be an outer pipe which is arranged on the outer wall of the inner tube and made of degradable and expandable materials. The locating piece can further comprise a locating groove and an absorbable line. The spiral locating groove is formed in the outer wall of the inner tube, the absorbable line is wound in the locating groove, the maximum external diameter of the wound absorbable line is slightly larger than the external diameter of the inner tube, so that the absorbable line is in direct contact with the inner wall of the human body nasolacrimal duct, and thus the effect that the artificial nasolacrimal duct is located in the human body nasolacrimal duct through the absorbable line can be achieved.

Description

technical field [0001] The invention relates to an artificial nasolacrimal duct, in particular to an artificial nasolacrimal duct with simple structure, convenient introduction and pouring, and avoiding repeated operations. Background technique [0002] The nasolacrimal duct is the two ducts through which tears flow from the eyes into the nasal cavity. Epiphora is a common and frequently-occurring disease in ophthalmology. It is mainly caused by the obstruction of the nasolacrimal duct. During treatment, it is necessary to implant the Insert or import artificial nasolacrimal duct stents. The current artificial nasolacrimal duct stents are divided into two types, artificial nasolacrimal duct stents made of degradable materials and alternative artificial nasolacrimal duct stents made of silicone materials. The artificial nasolacrimal duct stent made of degradable materials and the alternative artificial nasolacrimal duct stent made of silicone material require a minor operatio...

AI Technical Summary

Problems solved by technology

The advantage of the artificial nasolacrimal duct stent made of degradable materials is that after the human nasolacrimal duct is restored, the artificial nasolacrimal duct stent is completely absorbed, and there is no need to take out the artificial nasolacrimal duct stent again. The degradation process is a body degradation process. During the degradation process, it is prone to collapse, which leads to unsatisfactory repair of the nasolacrimal duct of the human body, affects the treatment effect, and is prone to blockage again; the alternative artificial In the process of removing the nasolacrimal duct stent, a second operation is required, which will not only cause great pain to the patient, but also leave scars

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