Endoscopic foregut surgery and interventions: The future is now. The state-of-the-art and my personal journey

Figure 16 Radiofrequency ablation mechanism and technique. A: Tightly spaced electrodes (250 µm apart) with pre-set energy and power densities, generator turns off when a pre-determined resistance level in the ablated tissues is reached (mean of 0.3 s); B and C: Circumferential radiofrequency ablation (RFA) delivered by balloon electrode to treat 4 cm segment with single activation; D and E: The catheter is advanced to the next segment with slight overlap; F-I: Focal RFA delivered with Barrx90 device which is secured onto scope tip and endoscopically directed over Barrett’s lesion.