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

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.

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...

AI Technical Summary

Problems solved by technology

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 flaw is that when dealing with peripheral vitreoretinal lesions where the eyeball needs to be pressed, this product is powerless

[0003] From 2003 to 2007, Chalam KV and others developed a series of lenses with 4 legs (plano-concave mirror, prism, biconcave mirror and panoramic mirror) as contact lenses. This kind of lens can be fixed by viscoelastic agent. Its advantages are It is easy to pick and place and does not affect the operation of the anterior chamber, but it has the disadvantages of being easy to slide and often deviates from the central axis, which brings inconvenience to the operator, so it cannot be further promoted

However, it can only be used with 25-gauge vitrectomy, but not with the more widely used 23-gauge vitrectomy

In 2008, the more promising 20-gauge minimally invasive vitrectomy system with a trocar came into being, further reducing its usefulness

In addition, the hard plastic affects the patient's anterior segment surgery. If the patient needs phacoemulsification and intraocular lens injection at the same time, the corneal ring must be removed, which is very inconvenient

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