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