RF electrode cannula

A system comprising:

• a cannula comprising (a) a cannula tube comprising a proximal end, a distal end, a cannula tube lumen, a sidewall, and a sidewall opening extending through the sidewall, the sidewall opening having a proximal end and distal end and (b) a cannula tip secured to the distal end of the cannula tube, the cannula tip comprising a proximal tip portion that is inserted into the cannula tube lumen and a distal tip portion that extends beyond the distal end of the cannula tube, the cannula tip being configured to allow fluid to flow therethrough, wherein the proximal tip portion of the cannula tip comprises a ramp at a proximal end thereof, wherein the ramp is configured to eject a distal tip of an elongated device through the sidewall opening of the cannula tube as the elongated device is inserted through the cannula tube from the proximal end of the cannula tube;
• and
• an electrode having a distal electrode tip, wherein the electrode is configured to be inserted into the proximal end of the cannula tube and through the cannula tube, and wherein the cannula tip is configured to eject the distal electrode tip through the sidewall opening of the cannula tube as the electrode is inserted through the cannula tube from the proximal end of the cannula tube.

An assembly comprising:

• a cannula comprising (a) a cannula tube comprising a proximal end, a distal end, a cannula tube lumen, a sidewall, and a sidewall opening extending through the sidewall, the sidewall opening having a proximal end and distal end and (b) a cannula tip secured to the distal end of the cannula tube, the cannula tip comprising a proximal tip portion that is inserted into the cannula tube lumen and a distal tip portion that extends beyond the distal end of the cannula tube, the cannula tip being configured to allow fluid to flow therethrough, wherein the proximal tip portion of the cannula tip comprises a ramp (122) at a proximal end thereof, wherein the ramp is configured to eject a distal tip of an elongated device through the sidewall opening of the cannula tube as the elongated device is inserted through the cannula tube from the proximal end of the cannula tube;
• and
• a stylet having a stylet tip, wherein the stylet is configured to be inserted into the proximal end of the cannula tube and through the cannula tube such that the stylet tip is proximate the sidewall opening when fully inserted.