basal vitrectomy

PVR, a proliferative vitreoretinopathy, is the formation of a cell proliferative membrane on the inner and outer surfaces of the retina and the vitreous, causing retinal pull separation. It is a complication of rhegmatogenous retinal detachment and retinal reattachment, and is the main cause of surgical failure, which occurs in about 12% of cases. The base vitreous resection is suitable for severe anterior and posterior PVR cases, with 360° resection. Treatment of diseases: proliferative vitreoretinopathy Indication Suitable for severe anterior and posterior PVR cases. Contraindications 1. The blood coagulation mechanism has serious obstacles. 2. Hypertension, diabetes, and some bleeding-prone diseases. Preoperative preparation 1. The patient was treated with 1% atropine eye ointment on the night before surgery. The sputum mixture was injected with 5% phenylephrine and prostaglandin antagonist Ocafen or subconjunctival injection 1 hour before surgery. 2. Pay attention to the infection. Surgical procedure 1. Aphakic or intraocular lens, the base vitreous can be removed through the same incision. Place a 50° prism contact lens, the assistant presses the sclera at the serrated edge, and gently pushes the top inward. It can be seen that after the colloidal vitreous is removed, the colloidal layer of the retina and the ciliary epithelium is closely attached, and the side of the cutting head is as close as possible to the eye. Wall, with a weak attraction until the vitreous is completely removed. 2. The method of having a lens is the same as the former. When only the opposite side of the cutter head, that is, the base portion at 180°, is removed, the hands are exchanged to prevent the body of the cutting head from touching the posterior capsule of the lens. 3. The base vitreous and its proliferating membrane should be treated first, followed by stripping of the posterior membrane. complication Eyelids, pain.