This is an observational study on the efficacy of the secondary placement of the A.M.I Soft Gastric Band in weight regain or weight loss failure after lap. gastric bypass.

Inclusion Criteria:

• Weight regain of more than 10 kg from nadir
• Excessive weight loss of less than 50% at 18 months after laparoscopic gastric bypass

Exclusion Criteria:

• Formerly leak at the gastrojejunostomy
• Formerly open abdominal surgery
• Anastomotic ulcer

Weight regain of more than 10 kg from nadir or weight loss failure defined as excessive weight loss of less than 50% 18 months after laparoscopic gastric bypass