Corneal stroma injection needle

A technology for injecting needles and corneal stroma, which is applied in the field of medical devices and can solve problems such as drug spillage, easy puncture of the full-thickness cornea, and insufficient dosage

Pending Publication Date: 2022-03-04
何宏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the thickness of the corneal stroma is only about 550 μm, when using this replacement needle to insert the needle, the angle and depth of the needle's entry are completely controlled by the doctor's experience and feel. If the pen

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  • Corneal stroma injection needle
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  • Corneal stroma injection needle

Examples

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

[0025] A needle for corneal stroma injection, comprising a needle, the needle includes a hollow needle body 1 and a needle point 2 at the front end, the needle body 1 is movably provided with a support member 3 with an arc-shaped bottom surface and a stopper 4, the The limiting member 4 limits the distance between the supporting member 3 and the needle tip 2 to be constant.

[0026] Wherein the support member 3 is attached to the needle tube body 1, so that the diameter of the needle tube body 1 increases at the position where the support member 3 is added, and the bottom surface is arc-shaped, so that the contact surface of the support member 3 and the cornea of ​​the eye can be made Close to point contact...

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Abstract

The invention provides a corneal stroma injection needle which comprises a needle body, the needle body comprises a hollow needle tube body and a needle tip located at the front end, a movable supporting piece and a limiting piece are arranged on the needle tube body, and the limiting piece limits the distance between the supporting piece and the needle tip to be constant. Due to the fact that the tube diameter of the needle tube body at the position where the supporting piece is additionally arranged is increased, and the bottom face of the supporting piece is arc-shaped, the contact face of the supporting piece and the cornea of the eyeball is close to point contact when the supporting piece abuts against the cornea of the eyeball, an operator can conveniently observe and adjust the included angle between the needle tube body and the supporting piece, and it is guaranteed that the needle tube body can obliquely penetrate into the cornea. And the limiting piece is used for enabling the length from the supporting piece to the needle point to be a preset value before puncture, so that an operator can conveniently determine the initial position before needle insertion, and the needle insertion depth can be conveniently designed according to the inclination angle of the needle tube body.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a corneal stroma injection needle. Background technique [0002] The cornea is a layer of transparent film at the front of the eye. It is mainly divided into five layers, namely the corneal epithelium, Bowman's membrane, stroma, Bowman's membrane and endothelial layer. Its total thickness is only about 550 μm, of which the stroma Layers account for most of the thickness. For patients with corneal diseases, it is usually necessary to apply drugs to the cornea in order to increase the local concentration of drugs in the cornea and alleviate the damage of the disease to the cornea to the greatest extent. At present, the treatment method of injecting drugs into the corneal stroma is a relatively direct and efficient treatment method for administering drugs to the cornea. It requires ophthalmologists to inject by piercing the injection needle into the corneal stroma under...

Claims

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Application Information

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IPC IPC(8): A61F9/00A61F9/007
CPCA61F9/0026A61F9/0008A61F9/00736
Inventor 何宏钟兴武
Owner 何宏
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