Patent ID: 8795270

Claim:
An electrosurgical system, comprising: a high frequency generator including at least one electrical connection; at least one instrument including; a plurality of electrodes, each of the plurality of electrodes including an elongated shaft having an exposed, conductive distal end coupled to the at least one electrical connection such that each electrode of the plurality of electrodes is energized at a same radiofrequency voltage potential from the high frequency generator; and a plurality of removably engageable, tissue-penetrating tips each having a closed distal end configured to be inserted into tissue of a patient's body having a hardened tissue volume and configured to penetrate the hardened tissue volume to create a plurality of orifices defined therein, wherein each of the tips are removably engageable with the at least one instrument using at least one of a threadable or interlocking connection and each of the tips selectively encapsulates the conductive distal end of each of the plurality of electrodes; wherein the plurality of electrodes are configured to be inserted into the tissue of the patient's body and into the hardened tissue volume through the plurality of orifices to subsequently apply energy from the high frequency generator to the conductive distal ends to induce a coherent heating effect in the hardened tissue volume from power deposition therein thereby producing a heat ablation volume in the hardened tissue volume; and a computer configured to selectively regulate an insertion depth of the at least one instrument to selectively adjust a depth of the plurality of orifices.