Medicotechnical basics of surgery using invasive ultrasonic energy.

Surgical techniques that use invasive ultrasonic energy for dissection and aspiration are a most advantageous extension of the methodological spectrum of conventional and endoscopic surgery. This article presents the technico-physical basics of the technology of ultrasonic surgery and the specific mechanisms underlying its effects on biologic tissue. A synopsis is given of the main fields of application of the ultrasonic aspirator in various surgical disciplines.