Chronic Abdominal Pain After Gastric Bypass
Chronic Abdominal Pain After Gastric Bypass
The study aims to explore patients perception of chronic abdominal pain after Roux en Y
 gastric bypass surgery for morbid obesity. The investigators aim to describe characteristics
 of symptoms of pain. Potential risk factors for developing abdominal pain post gastric bypass
 will be explored.
This is a single-center, prospective, longitudinal, cohort study performed at the Department
 of Morbid Obesity and Bariatric Surgery, Oslo University Hospital. Patients undergoing
 gastric bypass are eligible for inclusion. The study is approved by the Regional Committee
 for Medical and Health Research Ethics (no.2013/1263), South-East health region. All
 participants provide written consent for study paennrollment.

 The participants are asked to fill inn a set of questionnaires before and during follow-up
 after gastric bypass surgery. Symptom characteristics are explored and evaluated. Quality of
 life is included in the analyses. The main outcome is findings at 2 years post surgery, but
 the patients will be followed for 5 years.

 The investigators also aim to evaluate by objective measures the patients perception of pain
 by temperature and skin pressure stimulants before and after surgery (2 years).
Inclusion Criteria:

 • Indication for gastric bypass surgery i.e. BMI > 40 kg/m2 or BMI > 35 kg/m2 and obesity
 related comorbidity following failed attempts of sustained weight loss

 Exclusion Criteria:

 -  Other indications for gastric bypass surgery than obesity

 -  Previous bariatric surgery

 -  Other concomitant surgical procedures for abdominal pain such as cholecystectomy