transconjunctival cryotherapy

Conjunctival condensation is mainly used for the prevention of retinal detachment. Adhesion around the retinal tears is caused by condensation, preventing the liquefied vitreous from entering the subretinal from the holes. Because the conjunctiva is condensed, no incision is made and it can be performed in the clinic. Curing disease: Indication Conjunctival condensation is suitable for: 1. A retinal tear located between the equator and the serrated edge. It is generally believed that horseshoe-shaped hiatus, large hiatus, multiple hiatus, equatorial hiatus, hiatus hernia and localized mild dissociation are indications for prophylactic treatment. 2. Certain types of retinal degeneration areas, especially progressive lattice-like retinal degeneration. 3. Some retinal detachment is higher, but the hiatus is located in the upper part. After bed rest, the subretinal fluid is rapidly absorbed, and the conjunctival condensation can be used in combination with vitreous gas injection. Contraindications Retinal detachment is more obvious and it is not appropriate to perform this operation. Surgical procedure 1. Open the device. 2. The location of the hole and the closed hole in the binocular indirect ophthalmoscope under direct vision, the conjunctival condensed retinal tears and lesions, no conjunctival incision. 3. First place the retinal condensation head on the conjunctiva and gently indent it. When you see that the condensation head is just at the site to be treated, step on the foot switch, because the retina is not detached or detached very shallow, when you see the condensation When the color just turns gray, the condensation has reached the retinal pigment epithelium, usually within 1 s, the color becomes grayish, and the foot switch is immediately released. If it is excessively condensed, it may cause retinal hemorrhage or even necrosis.