x 1秒=100焦耳Р射频基础知识Р外科 Surgery?切开 Cutting (electro surgery)?凝血 CoagulatingР透热疗法 Diathermy?真皮下加热 Sub Dermal HeatingР1891 D Arsonoval experimentР电流通过 By passing currents ?带电粒子移动 Displacement of charged particles?水分子旋转 By rotation of water moleculesР加热依靠电流和组织的阻抗?Heating depends on current flow and resistance of tissue:?电流越强加热效果越大 The higher the current, the greater the heating effect?被加热区域越小加热越显著 The smaller the area, the greater the heating effect?组织电阻越大加热效果越大 The higher the tissue resistance, the greater the heating effectР能量强度的比较Р标准化强度-激光和射频Р0%Р10%Р20%Р30%Р40%Р50%Р60%Р70%Р80%Р90%Р100%Р0Р1Р2Р3Р4Р5Р6Р7Р8Р深度Z (mm)Р% 标准化射频РThermage?1.5cm2 中等深度触头Р1320nm(CoolTouch)Р10,600nm (CO2)Р1/e(37%强度)Р单激光均质模型РGrdРRFР皮肤 skinРa.正负两极在同一界面作用?b.穿透深度为两电极距离的1/2?c.治疗有效深度为2-4mm Р热量汇聚皮肤表层,易灼伤?能量穿透深度不够,效果不明显?对操作者技能要求高
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