Intra-operative retina fixer

Abstract

The invention discloses an intra-operative retina fixer which is used for complicated vitreous body resection operation and made of gold materials. The intra-operative retina fixer is characterized inthat the fixer is in a shape of a fine needle, a needle body is cylindrical, needle end portions are provided with convex arc-shaped surfaces, one needle end is provided with a flat head needle nose,accounts for 1 / 5 of the length of the fine needle and is gradually and oppositely reduced to a sheet along an axis of the needle body, a elliptical hole is reserved from the middle of the sheet to the end center, a ring is formed at the edge, and an end ring is gradually thickened. According to requirements of operated patients, the intra-operative needle body is folded into any shape, a retina is accurately and locally pressed, so that stripped proliferative membranes can reversely exert, a front proliferative membrane and a rear proliferative membrane of the retina are completely stripped,and the retina at a drawn position is protected. The intra-operative retina fixer is convenient to use and completely taken out after post-operation, residue and wound are omitted, the shortcomings ofpast perfluorocarbon liquid are fundamentally overcome, the intra-operative retina fixer can be repeatedly disinfected and used, so that operation safety and stripping efficiency are greatly improved, financial burden of a patient is greatly relieved, and the intra-operative retina fixer has high clinical popularization values.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a device for assisting in fixing the retina during complex vitrectomy for the treatment of proliferative vitreoretinopathy. Background technique [0002] Proliferative vitreoretinopathy (PVR) is the migration, attachment, and proliferation of retinal pigment epithelial cells, glial cells, and fibroblasts in the front and back interfaces of the retina or in the vitreous cavity in the case of rhegmatogenous retinal detachment or ocular trauma. , Form a cellular proliferative membrane in the front, back and vitreous of the retina, synthesize collagen and shrink, leading to retinal detachment, eventually leading to severe impairment of visual function and even blindness. Proliferative vitreoretinopathy (PVR) is one of the complications of retinal reattachment surgery, and it is also the main reason for the failure of retinal reattachment surgery. Once clinical patients wit...

AI Technical Summary

Problems solved by technology

The technical difficulty of PVR surgery is to fully remove the proliferative membrane at the front and back of the retina as much as possible, loosen the retina without damaging the retina, because the retinal proliferative membrane is often tightly attached to the front and rear surfaces of the retina, it is very difficult to fully peel off the proliferative membrane, and peeling off It is very easy to damage the retina during the process, resulting in retinal breaks and massive hemorrhage, which will seriously affect the surgical effect and the patient's prognosis, visual recovery, and may cause surgical failure

At present, in the removal of proliferative membrane, the main method used is to use perfluorocarbon liquid (heavy water) to assist in fixing the retina. The perfluorocarbon liquid must be removed in time after the operation, but the perfluorocarbon liquid is colorless and transparent liquid. Often it cannot be completely removed. For example, if perfluorocarbon liquid enters under the retina, it is particularly difficult to remove. Perfluorocarbon residual liquid left in the eye for a long time will have a toxic effect on the tissue, causing corneal edema and turbidity, and is more toxic to the retina. retinal cell damage

In addition, perfluorocarbon liquids are disposable consumables, which are expensive, and patients bear a great economic burden

At present, although the success rate of PVR surgery has been significantly improved, many patients still have unsatisfactory postoperative visual acuity, and the higher the severity of PVR, the higher the failure rate of surgery

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