DMBSS-A Randomized Trial of Different Laparoscopic Gastric Bypass Surgery in Patients With Obesity-related T2DM

Inclusion Criteria: * Age 20 to 67 years * Diagnosed with T2DM at least 6 months prior to enrollment, under the active care of a doctor for at least the six months prior to enrollment, HbA1c ≥ 7.5 % * Body Mass Index (BMI) ≥ 27.5 kg/m 2 and ≤ 34.9 kg/m 2 * Willingness to accept random assignment to either treatment group. * Willingness to comply with the follow-up protocol * Written informed consent. Exclusion Criteria: * Cardiovascular event (myocardial infarction, acute coronary syndrome, coronary artery angioplasty or bypass, stroke) in the past six months. * Current evidence of congestive heart failure, angina pectoris, or symptomatic peripheral vascular disease. * Cardiac stress test indicating that surgery would not be safe. * Pulmonary embolus or thrombophlebitis in the past six months * Cancer of any kind (except basal cell skin cancer or cancer in situ) unless documented to be disease-free for five years * Serum creatinine ≥ 1.5 mg/dl * History of stomach surgery, bile duct surgery, pancreatic surgery, splenectomy, or colon resection * Previous organ transplantation. * History of alcohol or drug dependency * Current participation in a conflicting research protocol.