Periodically degrading type tear drainage rebuilding system

Abstract

The invention relates to a tear drainage reconstruction system that can be regularly degraded. The reconstruction system is made by adopting polydioxanone (PDO) that is a degradable polymeric biomaterial. The system comprises an upper lacrimal duct part, a lower lacrimal dust part, a main lacrimal duct, a concave dacryocyst part and a nasolacrimal duct part. The system has good flexibility, certain elasticity, extensibility, breaking strength and compression strength performance and is a lamella micro-porous tubular structure that integrates stable nasolacrimal duct supporting function, 'tears pump' function, dacryocyst drainage function, 'drug control-release' function, the function of accelerating the fade-away of chronic inflammation of a lacrimal duct and the repairing function of mucous membrane injury of the lacrimal duct together. The reconstruction system has the advantages that an implanting method is a simple and convenient, the fixation in the lacrimal duct is the stable and reliable and the iatrogenic lacrimal duct injury cannot appear, the regular degradation can be realized without secondary take-out and the reconstruction system is suitable for various lacrimal duct obstruction diseases and has high curative ratio of the lacrimal duct obstruction, especially, the reconstruction system has the stable and reliable medium-to-long term effect. The tears drainage reconstruction system currently is the only perfect material for high-degree lacrimal duct reconstruction that combines the physiological drainage of the tears with the pathological mechanism of lacrimal injury repair.

Description

Technical field: [0001] The invention relates to an implant for ophthalmic surgery, which provides a novel lacrimal duct support that can be degraded regularly for reconstructing lacrimal fluid drainage in patients with lacrimal duct obstruction. Background technique [0002] Lacrimal duct obstruction is a common disease in ophthalmology, especially chronic dacryocystitis is often referred to as a "time bomb" next to the eyeball. When the cornea and eyeball are traumatized, suppurative corneal ulcer, suppurative endophthalmitis and other serious complication. In recent years, with the continuous improvement of people's demand for quality of life, the concept of "minimally invasive surgery for lacrimal duct obstruction" has been generally accepted. Lacrimal endoscopic micro-drilling and drainage, nasal endoscopic dacryocystorhinostomy have been carried out successively and are developing rapidly. But no matter which method is adopted, postoperative indwelling lacrimal duct ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the current lacrimal duct supports that cannot effectively promote the repair of lacrimal duct mucosal damage, to more fully drain tears, to avoid as much as possible secondary lacrimal duct damage caused by the second-stage removal, and to better fix the support Problem, the present invention provides a lacrimal drainage reconstruction system integrating the lacrimal canaliculus, common lacrimal duct, lacrimal sac and nasolacrimal duct. The implantation method is simple and quick, and it can not only provide stable and reliable lacrimal duct support function, and has good "tear pump" function, "sustained drug release" function, lacrimal sac pus drainage and lacrimal duct injury repair function. The internal fixation of the lacrimal duct is reliable and can be degraded and absorbed regularly without the need for secondary removal

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