The present invention is related to a medical device (1) adapted for the ablation of a target volume inside an anatomical organ, said medical device (1) comprising as elements a main body (2), stabilizing means (3) for stabilizing the device relatively to the organ and heating means in the form of a bipolar electrode (10) comprising parts activable by an external radiofrequency generator for heating said target volume, wherein said bipolar electrode comprises a first element having the form of a central anchoring member (5), and a second element having the form of at least two concentric rigid helices or coils (4′,4″,) of predetermined diameter (D) and length (L), said helices surrounding the central anchoring member (5). The present invention also concerns a surgical assembly comprising said medical device and controlling means as well as a process for the specific destruction a target volume inside an organ by means of said medical device or surgical assembly.
