Special needle head system for injection in vitreous body

Abstract

The invention relates to the field of medical instruments and provides a special needle head system for injection in ophthalmic corpus vitreum, which enables a surgeon to know the length, angle and the injection direction of an injection needle entering into an eye so as to avoid the step of disinfecting apparatus repetition, avoid potential cross infection and improve security and accuracy of injection in corpus vitreum. The special needle head system is characterized in that the special needle head system for injection in ophthalmic corpus vitreum comprises the injection needle, a needle head sleeve and an adjustable fixing support; length graduation marks are marked on the needle stem of the injection needle; length graduation marks are marked on the needle head sleeve; the adjustable fixing support is used in a matched manner with the special needle head system and can be vertically fixed on the needle stem, an arc-shaped bulbus oculi joint surface can be observed by observing through a side surface, and length graduation marks are also marked in the fixing support.

Description

technical field [0001] The invention relates to the technical field of medical devices, and is characterized by a special needle system for medical intravitreal injection. Background technique [0002] Intravitreal injection is a technique that penetrates the eyeball wall through the pars plana of the ciliary body and enters the vitreous, and then injects drugs into the vitreous. treat. Intravitreal injection has the advantages of local administration, less dosage, direct action of the drug on the lesion, and avoidance of systemic drug reactions. [0003] Intravitreal injection is one of the commonly used techniques in ophthalmology, especially for the treatment of macular edema and retinal choroidal neovascular diseases. In recent years, with the aging of the population and the improvement of living standards, the prevalence of age-related macular degeneration and diabetic retinopathy, which occupy the top two irreversible blindness spectrum, has increased significantly. ...

AI Technical Summary

Problems solved by technology

However, because it is impossible to directly observe the operation process of the injection needle in the eye, there are potential risks and inconveniences in the use of ordinary needles: the length of ordinary needles entering the eye cannot be quantified and can only be estimated artificially. If the drug concentration is too low in the anterior vitreous, the drug concentration in the posterior retinal lesion area will be too low and the curative effect will be reduced. Artificial estimation, excessive deviation of the angle can easily lead to puncture of the lens and retina; the position of the needle point and the eye cannot be determined, and the direction of drug diffusion during drug injection cannot be guaranteed; each injection needs to be specially equipped with an ophthalmic compasses to accurately mark the injection position. Repeated disinfection and sterilization

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