Percutaneous CT-guided Cryoablation of the Splanchnic Nerves

The patient will be sedated and continuously monitored by the anesthesia team, who will be present for the entire procedure. The puncture site will be anesthetized with 1% Lidocaine infiltration. Following tract anesthesia, and utilizing fluoroscopic CT guidance, four cryoablation probes (Ice Rods®) will be advanced, 2 on each side. In addition, a temperature monitoring probe (Boston Scientific, Multipoint 1.5 Thermal Sensor®) will be advanced on each side. The cryoablation process will include a 10-minute freeze, followed by a 3-minute passive thaw, and a brief active thaw to facilitate probe removal. A final scan will be obtained following removal of the probes. After the procedure, a sterile dressing will be applied, and subjects will be monitored for at least 12 hours in an observation bed in the hospital post-procedure.