A kind of hydrogel and its application

Abstract

Provided is a hydrogel, comprising the following raw materials in parts by weight: 10-80 parts of hydroxyethyl methacrylate, 1-20 parts of a crosslinking agent, 10-80 parts of water, and 0.042-36 parts of a reaction initiator. The crosslinking agent is at least one of poly(ethylene glycol) diacrylate, ethylene glycol dimethacrylate, and triallyl isocyanurate. The reaction initiator is a mixture of a thermal initiator and a catalyst or a photoinitiator. The hydrogel has good hydrophilic properties, strong mechanical properties, and good biocompatibility and stability in the human body. Also provided is an artificial nasolacrimal duct containing the hydrogel. The artificial nasolacrimal duct has high tear guiding efficiency and good biocompatibility and stability, can achieve a longer implantation period, and does not easily cause rejection and inflammatory reactions in long-term implantation, is capable of expanding after water absorption and achieving a self-fixation effect, and involves a simple implantation process and easy operation.

Description

technical field [0001] The invention relates to a polymer material, in particular to a hydrogel and its application. Background technique [0002] The nasolacrimal ducts are two ducts that discharge tears from the eyes into the nasal cavity. The one located in the bony official cavity is called the inner bone, which is about 12.4mm, and the one located in the mucosa of the outer wall of the nasal cavity is called the inner nasal cavity, which is about 5.32mm long. Epiphora is a common and relatively common eye disease. It is a frequently-occurring disease caused by tear fluid stagnation in the lacrimal sac due to stenosis or blockage of the nasolacrimal duct. Patients with this disease will cry for a long time, which seriously affects the quality of life of the patient. At present, the traditional treatment methods for such diseases are mainly lacrimal duct probing and dacryocystorhinostomy, but this type of operation is not only complicated to operate, seriously damaged, bu...

AI Technical Summary

Problems solved by technology

[0003] At present, the common artificial nasolacrimal duct stents are mainly made of the following materials: (1) Metal materials: mostly made of alloys, with good supporting effect, but high hardness, not easy to bend and deform, high lumen blockage rate, and many complications , which is rarely used at present; (2) glass: good supporting effect, but obvious foreign body sensation; (3) medical silicone rubber: stable physical and chemical properties, non-toxic, no rejection; The small nasolacrimal duct is squeezed and narrowed, which affects the curative effect; (4) Polyurethane: moderate hardness, better supporting effect, but poor biocompatibility, long-term insertion is easy to induce body rejection and chronic inflammation

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