Laparoscopic Adjustable Gastric Banding This surgery (LAP BAND®) involves a restrictive ring that is placed on the upper portion of the stomach making a small pouch, which results in the patient feeling satiated with smaller portions. There is no effect on the absorption of nutrients. The restrictive capacity of the band may be adjusted by injecting or withdrawing fluid through the port. The success of this device heavily depends on good patient compliance and maintenance. The potential complications are Lap band slippage, erosion, and failure of the device. Patients can expect to lose 55-60% of their excess body weight over 18 months.  With weight reduction, patients may see an improvement in obesity related medical conditions.