Needle for intracorneal stroma injection

Abstract

The invention provides a needle for intracorneal stroma injection. The needle consists of a needle head section, an arc-shaped connecting section and a needle tail section which are connected in sequence; the needle head section consists of a tip end and a bobbin, and a plurality of openings are equidistantly formed in the bobbin from the joint of the tip end along the axial direction of the bobbin according to a preset length; the outer side of the bobbin is sleeved with an elastic sleeve with the inner diameter the same as the outer diameter of the bobbin; and protrusions are arranged on theinner wall of the elastic sleeve in the axial direction of the bobbin at equal intervals according to the opening distance. By means of the needle, an operator can conveniently adjust and set the puncture depth, the depth of medicine entering the cornea is accurately designed, the problems of corneal perforation, superficial medicine injection and the like are solved, and meanwhile medicine corneal interlayer injection is achieved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a needle used for injection into the corneal stroma. Background technique [0002] Corneal disease is one of the most important blinding eye diseases. After the patient has corneal disease, it is often necessary to increase the local drug concentration to slow down the progress of the disease, so as to minimize the damage of the disease to the transparency of the cornea. [0003] The current treatment methods for keratitis include local drug administration, anterior chamber administration and intrastromal injection. However, there is currently no needle dedicated to intrastromal injection of the cornea. Physicians often use a 1ml syringe instead. Since the normal thickness of the cornea is only about 500 μm, the intrastromal injection may cause corneal perforation and cause intraocular transmission of infection, such as If the puncture depth does not reach the depth of the lesion,...

AI Technical Summary

Problems solved by technology

However, there is currently no needle dedicated to intrastromal injection of the cornea. Physicians often use a 1ml syringe instead. Since the normal thickness of the cornea is only about 500 μm, the intrastromal injection may cause corneal perforation and cause intraocular transmission of infection, such as The puncture depth does not reach the depth of the lesion, the local concentration of the drug is not enough to kill the pathogen, and the therapeutic effect cannot be guaranteed

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