A special non-silicon oil syringe for ophthalmology

Abstract

The invention discloses a non-silicon oil syringe for ophthalmology, which comprises a jacket and a core rod plugged into it. The core rod is divided into two sections, namely the front section of the core rod and the rear section of the core rod. The rear end and the front end of the rear section of the core rod are connected together through a T-shaped tongue and groove structure; the elastic modulus of the front section of the core rod is ≤600MPa, and the elastic modulus of the rear section of the core rod is ≥1Gpa; the front section of the core rod uses The material contains additives, the additives are erucamide and / or oleic acid amide, and the mass of the additives accounts for 0.1% to 1% of the total mass of the front section of the core rod; the front end of the front section of the core rod is provided with a ring a protrusion, and the annular protrusion is arranged coaxially with the core rod. The non-silicon oil-free syringe for ophthalmology of the present invention has no liquid residue when injecting liquid, does not contain silicone oil, is convenient to process and use, and has high safety and reliability.

Description

technical field [0001] The invention relates to a special silicone oil-free syringe for ophthalmology, which belongs to the field of medical equipment. Background technique [0002] At present, there are two types of seals between the core rod and the outer casing of the disposable ophthalmic syringe on the market. One is to use a plastic core rod to cooperate with the outer casing, and the other is to install or combine injection molding on the core rod. The rubber sealing ring is realized by matching with the outer casing. The former has poor sealing and sliding performance due to the combination of plastic and plastic; the latter is not simple enough in structure and complicated in production process. After the syringe injects the liquid, there will be residual liquid in the syringe casing and the cone head with these two sealing forms. The low-residue syringes on the market can only reduce the residual amount but cannot completely eliminate the residual. Ophthalmic inj...

AI Technical Summary

Problems solved by technology

The former has poor sealing and sliding performance due to the combination of plastic and plastic; the latter has a simple structure and a more complicated production process

After the syringe is injected with liquid, there will be residual liquid in the syringe jacket and the cone with these two sealing forms, and the low-residue syringes on the market can only reduce the residual amount but cannot completely eliminate the residual liquid.

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