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

Figure 18 Cryotherapy using nitrous oxide within balloon. A: Endoscopic view of focal cryoablation of multiple islands of Barrett’s epithelium; marking around the lesion with a snare tip helps with targeting; B: In-room view of hand-held control (by Dr. Chang) with nitrous oxide cartridges; C: New foot pedal console which controls nitrous oxide flow as well as vertical and left-right rotational movement of the spray orifice.