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Pre-treatment*
CT scan of 4 cm hepatoma
Post-treatment with
Cool-tip™ RF system*
CT scan of 6 month follow-up
*Goldberg SN; Gazelle GS; Mueller PR. “Thermal Ablation Therapy for Focal Malignancy: A Unified Approach to Underlying Principles, Techniques, and Diagnostic Imaging Guidance.” AJR:174, February 2000.
Cool-tip™ Animations
(Require QuickTime)
- Electrode insertion (732 K)
- Ablation process (3.9 MB)
- Thermal video (3.6 MB)
Related Links:
Cool-tip™
RF Ablation System
www.valleylabeducation.org
Tissue Effects Change as You Modify the Waveform
Electrosurgical Tissue Effects
Grounded Electrosurgical Systems
Isolated Electrosurgical Systems
Patient Return Electrode Monitoring Technology
Radiofrequency Ablation System
Electrosurgery Safety Concerns During MIS
Capacitive Coupling During Endoscopy
Recommendations to Avoid Electrosurgical Patient Complications in MIS
Adaptive Technologies
Radiofrequency Ablation System
Alternating current through the tissue creates friction on a molecular level. Increased intracellular temperature generates localized interstitial heating. At temperatures above 60°C, cellular proteins rapidly denature and coagulate, resulting in a lesion.
How it works
The Cool-tip™ system’s generator feedback algorithm senses tissue impedance and automatically delivers the optimum amount of radiofrequency energy. A unique electrode design eliminates tissue charring and allows for maximum current delivery, resulting in a larger ablation zone in less time.
Cool-tip™ Ablation
The generator software monitors tissue impedance and adjusts the output accordingly. Pulsed energy delivery allows the target tissue to stabilize, reducing tissue impedance increases that could limit RF output. Typical treatments are completed in a 12-minute cycle.
The Cooling Effect
The electrode’s internal circulation of water cools the tissue adjacent to the exposed electrode, maintaining low impedance during the treatment cycle. Low impedance permits maximum energy deposition for a larger ablation volume.
