射频-超声美容技术-赵小忠

lacement of charged particles ?水分子旋转 By rotation of water molecules 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 effect 阻抗 Resistance( ?)组织 Tissue 110 肌肉 Muscle 32心脏 Heart 289 皮肤 Skin 2180 脂肪 Fat 不同组织具有不同阻抗 Different types of tissues have different resistance BASIC CONCEPT OF DEEP HEATING 能量强度的比较标准化强度-激光和射频 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 012345678 深度 Z (mm) % 标准化射频 Thermage 1.5cm 2中等深度触头 1320nm (CoolTouch ) 10,600nm (CO 2) 1/e (37% 强度) 单激光均质模型 Grd RF 皮肤 skin a.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 ?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