Has hypnosurgery been used to avoid anaesthetic completely?
Yes! In the 19th Century it was used by some doctors prior to the introduction of chemical anaesthetics. In the last 50 years there have been instances of invasive surgeries where it was used to replace chemical anaesthetics completely. In the case of John Butler, the course instructor, he has used it in this way on various occasions, including by means of self-hypnosis, and in a live TV broadcast of a Hypnosurgery performed with no artificial chemicals whatsoever on a patient in April 2006.