Allogeneic scleral implantation

It is suitable for large-scale tissue defect repair and eyelid reconstruction in the upper and lower eyelids. Treatment of diseases: congenital aniridia Indication It is suitable for large-scale tissue defect repair and eyelid reconstruction in the upper and lower eyelids. Preoperative preparation For the preparation of allogeneic sclera, eyeballs such as ocular trauma, absolute glaucoma, etc. are used, the cornea and optic nerve are removed, the eye content is removed, the pigment in the inner layer of the sclera is scraped, and after washing, it is immersed in 95% alcohol solution. Change once a day for 3 days, then change to 75% alcohol soaking, refrigerate in a cold box for later use. When using, the allogeneic sclera is taken out, rehydrated with physiological saline for 10 to 15 minutes, and spirally cut on the allogeneic sclera according to the size, range and shape required by the operation. Surgical procedure The above re-creation is taken as an example. 1. The skin conjunctiva healed at the defect site of the upper jaw, the anterior layer is the skin and the posterior layer is the conjunctiva. Separate the conjunctiva to the iliac crest, sneak the subcutaneous tissue and the orbicularis oculi muscle, carefully search for and separate the upper end of the diaphragm. 2. The inner ankle was made into a 1.5 cm long curved skin incision, and the deep tissue orbicularis muscle was separated by a mosquito vascular clamp to expose the medial malleolar ligament. The outer ankle also made a 1.5 cm long curved skin incision, which separated the orbicularis muscle and exposed the external iliac ligament. 3. The internal and external ankle incision to the eyelid defect, under the orbicularis muscle as a tunnel. 4. According to the defect size, size and shape of the upper jaw, the allogeneic sclera is cut. Place a make up in the conjunctival sac. The allograft scleral bulge faces outward, and the two ends of the graft enter the inner and outer ankle incision through the tunnel. The medial fixation was sutured to the medial malleolus ligament, and the lateral fixation was sutured to the lateral malleolus ligament. The upper edge of the allogeneic sclera was sutured with the free edge of the superior iliac muscle. 5. The lower lip of the lower jaw is opened and the epithelial tissue of the posterior lip of the lower temporal margin is removed. The free edge of the superior conjunctiva was sutured together with the free edge of the allogeneic sclera and the posterior layer of the inferior temporal margin. 6. The skin above the defect of the upper jaw and the orbicularis muscle are sneaked apart, pulled down, covered on the surface of the allogeneic sclera, and sutured with the anterior layer of the inferior temporal margin.

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