Comparison Table
| Type of Operation | Duodenal Switch | Gastric Bypass | Adjust Lap Band |
| % excess wt. loss | 75-95% | Approx 50-60% | Approx 50% |
| Stomach size | 100-140 cc | 3cc-30cc | 15cc-25cc |
| Preservation of stomach physiology | Yes | No | Yes |
| Stenosis of entero gastrostomy | No | Yes | No |
| Vomiting | No | Yes | Yes |
| Band slip, obstruction, erosion, infection | No | No | Yes |
| Port migration - infection rate | No | No | Yes |
| Esophageal dilatation | No | Yes | Yes |
| Early perforation of staple line | Yes | Yes | No |
| Connecting system leak | No | No | Yes |
| Possibility of anemia * | Yes | Yes | No |
| Possibility of protein malabsorption ** | Yes | Yes | No |
| Vitamin and mineral supplements needed | Yes | Yes | No |
| Risk of osteoporosis *** | Yes | Yes | No |
| Risk of incisional hernia | Yes x3 | Yes x3 -openx1 lap | Yes x1 |
* easy to control with oral intake- in some instances intravenous iron infusions necessary
** rare and temporary (in some cases requiring iv nutrition TPN)
*** easy to control - rare- if patient is compliant and patient is taking recommended supplements
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