Stitch-free silicon rubber corneal arcus for use in vitreous body resection operation using needle with casing pipes

A vitrectomy and silicone rubber technology, applied in the field of corneal rings, can solve the problems of affecting patients, reducing practicability, eyeball perforation, etc., and achieving the effects of reducing unstable interference, easy sterilization, and good flexibility

CN101695460AInactive Publication Date: 2010-04-21吴建国
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-04-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a stitch-free silicon rubber corneal arcus for use in a vitreous body resection operation using a needle with casing pipes, which consists of a medical silicon rubber ring, wherein the surface between the upper and lower two ends of the ring have a spherical shape having a curvature similar to that of eye balls; the periphery of the bottom surface of the ring is provided with first sectorial thin claw, second sectorial thin claw and third sectorial thin claw which have the same structure at the positions corresponding to three casting pipes respectively; the inside diameter a of the ring is more than or equal to 10 millimeters and less than or equal to 12 millimeters, the thickness b is more than or equal to 1 millimeter and less than or equal to 2 millimeters, and the height c is more than or equal to 1 millimeter and less than or equal to 3 millimeters; the length e of the sectorial thin claws is more than or equal to 3 millimeters and less than or equal to 8 millimeters, the thickness f is more than or equal to 0.1 millimeter and less than or equal to 1.5 millimeters and the radian g of the sectors is more than or equal to 20 DEG and less than or equal to 90 DEG; and the coplanar curvature d of the bottom surface of the ring and the first, second and third sectorial thin claws ranges from 10 millimeters to 14 millimeters. The stitch-free silicon rubber corneal arcus has the advantages of simple structure, convenient operation, stable supporting effect and suitability for various vitreous body resection operation systems using the needle with casing pipes.
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Description

technical field

[0001] The invention relates to a corneal ring used in ophthalmic clinical operations, more specifically, the invention relates to a corneal ring used for supporting contact lenses in minimally invasive vitrectomy operations. Background technique

[0002] It is well known that contact lenses provide a visual pathway for vitreous surgery and thus become an essential device for minimally invasive ophthalmic surgery. In minimally invasive vitrectomy surgery, the traditional support method for contact lenses is to fix a metal ring on the patient's corneal limbus with 2-4 sutures. risk factor. For this reason, some researchers have tried to develop suture-free corneal rings. In 2002, Ikuno Y et al. first proposed the concept of suture-free corneal ring and provided a product in which the stainless steel ring was fixed on the eyelid speculum with a rubber band to solve the aforementioned ocular surface hemorrhage, eyeball perforation, etc. The problem, but the f...

Examples

Embodiment Construction

[0024] In order to make the content of the present invention more clearly understood, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] Known, the weight of standard contact lens is only between 0.4-1.4g, and its height is between 2-5mm, so, the present invention adopts the silicone rubber of moderate hardness to be able to satisfy the requirement to described contact lens. Supporting strength, and, because of the good flexibility of medium-hard silicone rubber, there will be no operational restrictions on the operation of the anterior segment.

[0026] It is also known that the length of the resin sleeve of the Alcon surgical operating system inserted into the eyeball is 4mm (23-gauge) or 3.7mm (25-gauge), so the present invention sets the annulus of the corneal ring as a large-diameter annulus , and three fan-shaped thin claws are extended from the position corre...