METHOD AND APPARATUS FOR CONTROLLED AND ENHANCED EVAPORATION DURING CRYOGEN SPRAY COOLING

摘要

Dermatological laser treatment methods, devices that employ air convection (air flow) enhanced cryogen spray cooling to reduce the risk of non-specific thermal injury of the epidermis, and underlying dermis during laser procedures such as wrinkle, hair or tattoo removal, or treatment of port wine stains are provided. A preferred device (10) comprises a directed airflow device (18) (air jet), a cryogen delivery device (16) and a laser delivery optics (14). A preferred method includes using the device to cool a designated outer surface portion of living skin by spraying a liquid cryogen onto the surface, to form a cooling film before or during laser actuation.