Patent ID: 7540870

Claim:
An ablative apparatus comprising: a. An ablation probe containing: i. a proximal surface; ii. a distal surface opposite the proximal surface; iii. at least one radial surface extending between the proximal surface and the distal surface; and iv. at least one abrasive member on a surface of the ablation probe other than the proximal surface; b. A transducer capable of ultrasonically driving the ablation probe in contact with the proximal surface of the ablation probe containing: i. at least one piezo ceramic disc; and ii. electrodes capable of exposing the at least one piezo ceramic disc to an alternating voltage; c. A guide wire secured at one end to the transducer; d. A handle secured at the end of the guide wire opposite the transducer; e. Electrical leads running along the guide wire and connected to electrodes within the transducer; f. A catheter encasing the ablation probe, transducer, and at least a portion of the guide wire containing: i. a proximal end; ii. a distal end opposite the proximal end; iii. a pocket at the distal end of the catheter encasing the ablation probe; iv. a cryogenic intake lumen originating at the proximal end of the catheter and running substantially the length of the catheter; v. a cryogenic exhaust lumen running substantially the length of the catheter, substantially parallel to the cryogenic intake lumen, and terminating at the proximal end of the catheter; vi. a junction connecting the intake lumen and exhaust lumen at distal ends of the intake and exhaust lumens; and vii. a partition distal to the junction isolating the intake lumen and exhaust lumen from the pocket encasing the ablation probe.