Abstract: A hand held applicator for delivery of microwave energy to skin surfaces is provided that is compact, easily manipulated, precisely positionable and secure against malfunction. Microwave energy of a chosen frequency is supplied for a given duration at a predetermined energy level, via one or more waveguides having a distal end section that is dielectrically loaded and matched to skin impedance. Positioning indicia may be disposed on a single use end cap adjacent the emitter end of the applicator to permit easy visualization by the surgeon or technician. Coolant, such as a pressurized gas refrigerant, is supplied in a burst to the skin surface via an interior solenoid controlled valve. The microwave energy pulse is initiated by control circuits after the effective delivery of coolant is sensed. The initiation of the cycle can be effected by actuation of a switch, movement of the applicator against the skin, or by tracking the movement of the applicator from one position to another.

Abstract: A system and method for treating subcutaneous histological features without affecting adjacent tissues adversely employs microwave energy of selected power, frequency and duration to penetrate subcutaneous tissue and heat target areas with optimum doses to permanently affect the undesirable features. The frequency chosen preferentially interacts with the target as opposed to adjacent tissue, and the microwave energy is delivered as a short pulse causing minimal discomfort and side effects. By distributing microwave energy at the skin over an area and adjusting power and frequency, different conditions, such as hirsuitism and telangiectasia, can be effectively treated.