When a cryogen spurt is applied to the skin surface for an appropriately short period of time (on the order of milliseco摘要雷射治疗血管瘤成功的先决条件是经由选择性光热效应破坏皮下扩张的血管而不造成表皮的伤害。
When the surface temperature during laser illumination reached 36-45℃, a 30-100 m/sec cryogen spurt was delivered.利用红外线温度检测回馈系统来控制冷媒喷射出的时间。