Abstract: A monopolar electrosurgical instrument includes a hollow cylindrical metallic electrode which is connected to one pole of a radio frequency generator via a first end of the electrode, and a handle connected to and partially covering the electrode. The electrode includes at least one lumen to permit liquid supply of cooling liquid to the hollow electrode, a part covered with an insulative material, and a coagulating and cutting uninsulated tip. The tip includes a round ending part, a part attached to the cutting metal blade near the round ending part, and a part non-attached to the cutting metal blade. It is useful for precisely cutting the tissue that it is previously coagulated, using a single instrument, and avoiding risk of bleeding.

Abstract: Catheter for the radiofrequency ablation of tissue, comprising at least one pair of bipolar electrodes adapted to function in bipolar mode, each bipolar electrode comprising supply channels adapted for the perfusion of saline solution around the electrodes, the catheter further comprising at least two end electrodes arranged towards opposed ends of the catheter, on either side of the pair of bipolar electrodes, said end electrodes adapted to function in monopolar mode.

Abstract: An applicator device (1, 1?) for radiofrequency ablation of biological tissues; the device comprises an electrode whose outer surface is covered with an insulating cover (2, 2?) in a proximal portion, and has a conductive distal portion (3, 3?) whose electrode includes internal refrigeration means (7, 7?); an infusion system with a distal end (13, 6) for infusing a fluid in said tissue; wherein said distal end (13, 6) of the infusion system has an electrically insulating outer cover and is located, in the infusion position for said fluid, at a distance between 2 and 5 millimetres from said outer surface of the internally cooled electrode. The invention also concerns a method for ablation by radiofrequency of biological tissues.

Abstract: A monopolar electrosurgical instrument comprising a cylindrical metallic electrode which is connected to one pole of a radio frequency generator on one extreme; said electrode comprising a liquid supply for cooling, a handle 7 that covers part of the electrode, a part 6 covered with an insulative material, and a coagulating and cutting uninsulated tip; said tip comprising a round ending part 2, a part 3 attached to a cutting metal blade 5 near the end, and a part 4 non-attached to a cutting metal blade. It is useful for precisely cut the tissue that it is previously coagulated, using a single instrument, and avoiding risk of bleeding.

Abstract: Catheter for the radiofrequency ablation of tissue, comprising at least one pair of bipolar electrodes adapted to function in bipolar mode, each bipolar electrode comprising supply channels adapted for the perfusion of saline solution around the electrodes, the catheter further comprising at least two end electrodes arranged towards opposed ends of the catheter, on either side of the pair of bipolar electrodes, said end electrodes adapted to function in monopolar mode.