I don't think this needs a lot of introduction - but if it does, they are talking about electro-surgery instead of old-fashioned scalpels.  Electro-surgery, which uses concentrated electric currents, has been around since 1914 but this is a new ... area of experimentation.

Who are the test subjects for this?  And why not use a laser?   You'll have to read to find out, but Dr. Tsai said no penises were harmed during the course of the experiment.