Medical device capable of injection, cutting and coagulation

A device for treating tissue, comprising:

• a catheter extending from a proximal end to a distal end and including a lumen extending therethrough, the distal end of the catheter including a first electrode and a second electrode extending thereabout, the first electrode extending to a lumen distal opening of the lumen;
• a first needle extending within the lumen from a proximal end to a distal end, the first needle being movable within the lumen between a bipolar configuration in which the distal end of the first needle is received within the lumen and an extended monopolar configuration in which the distal end of the first needle extends distally out of the lumen distal opening in contact with the first electrode, the second electrode being electrically connected to a proximal portion of the first needle to provide a return path for current, the first needle including a channel extending longitudinally therethrough to a channel distal opening;
• and
• a second needle slidably received within the channel, a distal end of the second needle being configured to cauterize tissue.

A device for treating tissue, comprising:

• a catheter extending from a proximal end to a distal end and including a lumen extending therethrough to a lumen distal opening, the distal end of the catheter including a first electrode and a second electrode extending thereabout with the first electrode extending to the lumen distal opening;
• a first needle movable within the lumen between a bipolar configuration in which a distal end of the first needle is received within the lumen and an extended monopolar configuration in which the distal end of the first needle extends distally out of the lumen distal opening in contact with the first electrode, the second electrode being electrically connectable to a proximal portion of the first needle to provide a return path for current, the first needle including a channel extending longitudinally therethrough to a channel distal opening;
• and
• a second needle slidably received within the channel.