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Full embedding bed deep lamellar cornea grafting composite instrument

A technology of lamellar cornea and implant bed, which is applied in the field of surgical instruments, can solve the problems that are difficult to achieve, such as simplicity, safety, and complete exposure of the elastic membrane, and achieve the effects of low cost, simple manufacture, and reasonable structural design

Inactive Publication Date: 2005-06-08
THE AFFILIATED SIR RUN RUN SHAW HOSPITAL OF SCHOOL OF MEDICINE ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, some researchers improved the trephination system 9 , corneal stroma staining 10 , anterior chamber endoscopy 11 and other means to try to expose the elastic membrane, but it is difficult to achieve the purpose of simple, safe and complete exposure of the elastic membrane

Method used

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  • Full embedding bed deep lamellar cornea grafting composite instrument
  • Full embedding bed deep lamellar cornea grafting composite instrument
  • Full embedding bed deep lamellar cornea grafting composite instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] See Figure 1, figure 2 The deep corneal stroma hook I provided by the present invention is composed of a handle 1 and an extension rod 2 with a hook head 3. The extension rod 2 is bent at a distance of 1.00-1.50 centimeters from the handle 1 to form an included angle α. The range is 120°<α<150. The hook head 3 is the head end of the extension rod 2, which is an isosceles triangle and forms a vertical bend with the extension rod 2 to the left. The bottom width of the isosceles triangle hook head 3 is 0.10 -0.30 mm, side length 0.20-0.40 mm, isosceles triangular hook head 3 is fine and sharp, and the outer wall of hook head 3 is smooth and flat. During operation, the hook head 3 can be used to hook the fibers of the deep and thin corneal stroma to realize collagen fibers Peel off layer by layer until the Descemet's membrane is fully exposed.

Embodiment 2

[0020] Referring to FIG. 3 , the equilateral triangular hook head 3 and the extension rod 2 are bent vertically to the right, and the rest of the structure is the same as that of the first embodiment.

Embodiment 3

[0022] see Figure 4 , Figure 5 The viscoelastic injection needle II provided by the present invention is composed of a needle base 4 connected to a needle tube 5, the needle base 4 can be set on a conventional viscoelastic injector, and the needle tube 5 is bent at a distance of 1.40-1.60 cm from the needle base 4, An included angle β is formed, the range of the included angle β is 145°<β<175°, the inner diameter of the needle tube 5 is 0.35-0.45 mm, the thickness of the needle tube 5 wall is 0.10-0.20 mm, the outer wall of the needle tube is smooth, and the head end of the needle tube 5 is arc-shaped The range of slope γ is 30°<γ<45°. Since the head of the needle tube 5 is designed as a slope, the wall of the needle tube 5 is thin and smooth, so it can be conveniently and safely inserted into the pocket-shaped exposed posterior region during surgery. Between the elastic membrane and the corneal stroma, viscoelastic substances are injected to achieve the purpose of complete...

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Abstract

A combined apparatus for the deep corneal transplantation is composed of two deep corneal matrix hooks consisting of handle and the extended rod with hook head, and a viscoelastic agent injector consisting of needle seat and tube. Its advantages are short operation time and high safety and effect.

Description

technical field [0001] The invention relates to surgical instruments, and mainly relates to a combination instrument for deep lamellar corneal transplantation in ophthalmology. It is suitable for full-bed deep lamellar keratoplasty. Background technique [0002] The first corneal transplant was performed in 1877. After more than 100 years of development, this transplant has become one of the most clinically successful organ transplants 1，2 . Nevertheless, rejection is still the main cause of corneal transplant failure, especially in high-risk cases, such as the invasion of a large number of new blood vessels in the cornea, the transplantation of large-diameter grafts, and repeated multiple transplants. Reaction rate is still quite high 1，3 . [0003] The most important property of the cornea is its transparency. Various diseases can cause the cornea to scar and cloud and lose its transparency. In most cases, the scar opacity of the cornea mainly occurs in the corneal st...

Claims

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Application Information

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IPC IPC(8): A61F9/007
Inventor 姚玉峰朱也飞裘文亚
Owner THE AFFILIATED SIR RUN RUN SHAW HOSPITAL OF SCHOOL OF MEDICINE ZHEJIANG UNIV
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