BOOM-IBD2 Pivotal Clinical Trial

Inclusion Criteria: * Male or female * 18 to 85 years of age * Diagnosed with ulcerative colitis * Ability and willingness to consent to participate by signing the informed consent form * Ability to comply with the protocol and willingness to comply with all follow up requirements Exclusion Criteria: * Any significant medical condition that is likely to interfere with study procedures, device operation, or likely to confound the results of the study * Any psychiatric or personality disorder at the discretion of the study investigator * Any active bacterial infection with a risk of bacteremia or sepsis (e.g. presence of abscess) * Active clostridium difficile infection of the colon * Active cytomegalovirus (CMV) infection of the colon * Evidence of colonic perforation * Fulminant colitis requiring emergency surgery * Microscopic, ischemic or infectious colitis * Unresected neoplasia of the colon * Colonic stricture unable to pass a colonoscope * Current evidence of cancer in the gastrointestinal tract * Current participation in another clinical trial * Previous history of surgery for ulcerative colitis, or probably to require such intervention * Previously implanted with a neurostimulation device or participated in a neurostimulation trial * Inability to operate the patient programmer