HARMONIC SYNERGYÂ Blades feature a combination curved and hooked blade. The new platform offers the same benefits as the Combination Hook Blade (HK 105) but is an ergonomic hand piece and uses the ultrasonic technology for greater precision for safer dissection near vital structures. The unit can cut, coagulate and dissect, reducing the number of instruments needed. It also reliably seals and divides vessels less than 2 mm in diameter. The ultrasonic vibration technology allows you to simultaneously cut and coagulate tissue, minimizing lateral thermal tissue injury and reducing the need for electrocautery. Patients recover faster in oral cavity procedures vs. Bovie. Tonsillectomy patients have a reduced incidence of severe or very severe post-op pain when the HARMONIC Blade device is used.