激光在眼底手術(shù)中的應(yīng)用激光在眼底手術(shù)中的應(yīng)用1激光的特點方向性好——光學(xué)瞄準(zhǔn)容易、方便聚焦單色性——選擇眼內(nèi)特定組織吸收光的波長能量密度高可變的脈沖間隔——激光熱量彌散限制在很小的范圍,使產(chǎn)生精確的激光-組織共同作用激光的特點2激光的作用激光的生物學(xué)效應(yīng)熱效應(yīng)激光→靶組織吸收→組織溫度升高→組織蛋白變性+凝固-汽化碳化電離效應(yīng):(Qs-Nd:YAG)光化學(xué)效應(yīng):PDT激光的作用3波長與眼靶組織色素吸收不吸收黑色素(色素膜、RPE藍(lán)、綠、黃紅外紅(400-600nm)血色素(血紅蛋白、脈絡(luò)膜)黃、綠、藍(lán)紅、紅外葉黃素藍(lán)綠(部分吸收)黃、紅(黃斑占70%)波長與眼靶組織色素4激光參數(shù)-光斑光斑:100500um小:邊緣銳利-用于后極部和封孔。大:破壞缺血缺氧區(qū)面積大(黃斑100um,后極200um,血管弓外500um)實際光斑大小激光參數(shù)-光斑5激光在眼底手術(shù)中應(yīng)用課件6激光在眼底手術(shù)中應(yīng)用課件7激光在眼底手術(shù)中應(yīng)用課件8激光在眼底手術(shù)中應(yīng)用課件9激光在眼底手術(shù)中應(yīng)用課件10激光在眼底手術(shù)中應(yīng)用課件11激光在眼底手術(shù)中應(yīng)用課件12激光在眼底手術(shù)中應(yīng)用課件13激光在眼底手術(shù)中應(yīng)用課件14激光在眼底手術(shù)中應(yīng)用課件15激光在眼底手術(shù)中應(yīng)用課件16激光在眼底手術(shù)中應(yīng)用課件17激光在眼底手術(shù)中應(yīng)用課件18激光在眼底手術(shù)中應(yīng)用課件19激光在眼底手術(shù)中應(yīng)用課件20激光在眼底手術(shù)中應(yīng)用課件21激光在眼底手術(shù)中應(yīng)用課件22激光在眼底手術(shù)中應(yīng)用課件23激光在眼底手術(shù)中應(yīng)用課件24激光在眼底手術(shù)中應(yīng)用課件25激光在眼底手術(shù)中應(yīng)用課件26激光在眼底手術(shù)中應(yīng)用課件27激光在眼底手術(shù)中應(yīng)用課件28激光在眼底手術(shù)中應(yīng)用課件29激光在眼底手術(shù)中應(yīng)用課件30激光在眼底手術(shù)中應(yīng)用課件31激光在眼底手術(shù)中應(yīng)用課件32激光在眼底手術(shù)中應(yīng)用課件33激光在眼底手術(shù)中應(yīng)用課件34激光在眼底手術(shù)中應(yīng)用課件35激光在眼底手術(shù)中應(yīng)用課件36激光在眼底手術(shù)中應(yīng)用課件37激光在眼底手術(shù)中應(yīng)用課件38激光在眼底手術(shù)中應(yīng)用課件3