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Abbreviation for electrostatic unit.
Farlex Partner Medical Dictionary © Farlex 2012

electrosurgical unit



A device used to cut and coagulate tissues during surgery, using alternating current that changes direction at a frequency of between 500,000 and 3,000,000 hertz. An ESU is an alternative to other cutting tools, such as surgical blades or lasers.
Medical Dictionary, © 2009 Farlex and Partners