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SODIUM HYALURONATE VISCOUS SOLUTIONS FOR USE AS MASKING FLUID IN THERAPEUTIC PHOTOKERATECTOMY BY MEANS OF EXCIMER LASER
SODIUM HYALURONATE VISCOUS SOLUTIONS FOR USE AS MASKING FLUID IN THERAPEUTIC PHOTOKERATECTOMY BY MEANS OF EXCIMER LASER
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机译:准分子激光在透明质酸照相术中作糊状液体用的透明质酸钠溶液
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摘要
Sodium hyaluronate viscous aqueous solutions of molecular weight from 1,200,000 to 2,200,000 Daltons at concentrations from 0.10% to 0.40% by weight are proposed for use as masking fluid in therapeutic photokeratectomy by means of excimer laser (PTK), which realizes the ablation of superficial layers of corneal tissue for the elimination of uneveness and macula derived from different traumatic or pathological conditions. Preferably, the proposed solutions also contain one or more cationic species selected from the group consisting of sodium, potassium, calcium and magnesium ion and one or more anionic species selected from the group consisting of chloride, phosphate and citrate ion and, preferably, glucose. The solutions according to the invention wet the cornea and protect its areas which remain distressed after surgery, enabling the obtainment of uniform and smooth ablated surfaces. Further, they enable the execution of intraoperative corneal topographic tests.
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