Vidamed, Inc.

James A Baker, Jr

Stuart D Edwards

Ingemar H Lundquist

Phillip R Sommer

Hugh R Sharkey

Ronald G Lax

Kee S Lee

Christopher Scott Jones

A medical device for the treatment by radio frequency ablation of a target volume in tissue of a prostate comprising an elongate probe member having proximal and distal extremities and having a passage therein extending from the proximal extremity to the distal extremity. The elongate probe member is sized so that it can be introduced into the urethra. At least one guide tube having proximal and distal extremities is mounted in the passage of the elongate probe member for nonlongitudinal movement therein. The at least one guide tube has a lumen extending therethrough from the proximal extremity to the distal extremity. A radio frequency conductive electrode is disposed in the lumen. A handle is coupled to the proximal extremity of the elongate probe member and includes a finger actuatable mechanism secured to the radio frequency electrode for advancing and retracting the radio frequency electrode with respect to the at least one guide tube. The distal extremity of the at least one guide tube has a curved surface for directing the radio frequency electrode sidewise of the longitudinal axis into the tissue of the prostate.

Radio frequency ablation device for treatment of the prostate

A transurethral needle ablation device for use with the human hand for radio frequency ablation of a target volume in the tissue of a prostate of a human male having a bladder with a base and a penis with a urethra therein formed by a urethral wall extending into the base of the bladder along a longitudinal axis with the tissue of the prostate surrounding the urethra near the base of the bladder. The device comprises a bridge having proximal and distal extremities and having a passage therein extending from the proximal extremity to the distal extremity. A sheath having proximal and distal extremities is secured to the bridge and has a passageway therein in communication with the passage in the bridge. The sheath is sized so that it can enter the urethra and has a length so that when its distal extremity is in the vicinity of the prostate, the proximal extremity is outside the urethra. A disposable needle assembly having proximal and distal extremities is removably mounted in the passage in the bridge and extends through the passageway in the sheath. The needle assembly includes at least one needle electrode and an insulating sleeve coaxially disposed on the needle electrode. The proximal extremity of the needle assembly is caused to be moved sideways at an angle with respect to the longitudinal axis to face the urethral wall. A mechanism is carried by the proximal extremity of the needle assembly and the bridge for causing advancement of the needle electrode and the insulation sleeve thereon through the urethral wall and into the target volume in the tissue of the prostate with a portion of the electrode being free of the insulation but with the insulation extending through the urethral wall.

Transurethral needle ablation device and method for the treatment of the

A transurethral needle ablation device for the treatment of the prostate of a human male using radio frequency energy wall comprising a sheath having a lumen extending therethrough. A guide tube assembly is slidably mounted in the lumen in the sheath and having a lumen extending therethrough. A needle electrode is slidably mounted in the lumen in the guide tube assembly. An insulating sheath is disposed about the needle electrode so that the distal extremity of the needle electrode is exposed. A handle adapted to be gripped by the human hand is mounted on the proximal extremity of the sheath. Levers are carried by the handle for causing bending of the distal extremity of the guide tube assembly at an angle with respect to its longitudinal axis whereby the lumen in the guide tube assembly can be directed so that it faces the urethral wall. A control is carried by the handle and coupled to the needle electrode and the insulating sleeve for advancing and retracting the needle electrode with respect to the guide tube assembly whereby when the sheath is positioned in the urethra with its distal extremity in the vicinity of the prostate, the needle electrode can be advanced through the urethral wall and into the tissue of the prostate to permit the application of radio frequency energy to the tissue of the prostate surrounding the needle electrode to form a lesion in the prostate.

Transurethral needle ablation device with cystoscope and method for

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Grass Valley, CA, United States of America

James A Baker, Jr