GAS EXPLOSION
Explosive complications of colonoscopy are rare, but they have serious consequences. A 2007 review reported 9
cases, each resulting in colonic perforation and, in one case, death. Gas explosion can occur when combustible
levels of hydrogen or methane gas are present in the colonic lumen, oxygen is present, and electrosurgical energy is used (eg, electrocautery or argon plasma coagulation). Suspected risk factors are use of nonabsorbable or incompletely absorbable carbohydrate preparations, such as mannitol, lactulose, or sorbitol, and incomplete colonic cleansing either because a sigmoidoscopy preparation was used (eg, enemas) or because the result of a colonoscopic purge preparation was inadequate. Some authors have advocated use of carbon dioxide during colonoscopy as a preventive measure.
Here is the link to the source but I was/am reluctant to post it cause I don't want to freak anyone out - I've had ummm maybe around 6-8 colonoscopies and a flex sig all with zero complications and even watched one while awake.
Complications of colonoscopy
www.asge.org/assets/0/71542/71544/56321364-c4d8-4742-8158-55b6bef2a568.pdf------------
What I was really looking for was if anyone perfectly health ever develops UC or Crohn's-Colitis immediately after a colonoscopy.