Ultrasonic coating systems by Sono-Tek Corporation, Milton, NY, are for ultra-thin film functional coatings onto various medical devices such as catheters, balloons, orthopedic implants, endoscopic instruments, pacemakers, heart valves, glucose monitors, sensors, medical textiles, blood collection tubes, surgical implants and diagnostic devices.  The systems have long been used in precision drug eluting stent coating systems and are now being used to coat a range of solutions or suspensions to deliver targeted permanent or slow-release functional coatings. The ultrasonic nozzles use high frequency sound vibrations combined with precision air shaping technology to create a soft, focused spray of micron-sized droplets ranging from 18 to 49 microns, depending on nozzle frequency. Features include: savings of up to 80% in coating material, precise control of spray shape and flow rate, minimal overspray, non-clogging repeatable performance, tight drop distribution resulting in highly uniform thin films, and excellent penetration and adherence to complex geometries without webbing.