Typical postoperative endoscopic findings
| Laparoscopic adjustable silicone gastric banding | External compression by the band on the proximal stomach will be visible. Dilation of the banded area is contraindicated. The band is visible if erosion has occurred. |
| Roux-en-Y gastric bypass | The gastric pouch is small so minimal air should be inflated. The gastrojejunostomy, which is an end-to-side anastomosis giving a double-barrel view, has a stoma which should measure around 10–12 mm in diameter. There is a 1–2 cm blind limb of jejunum distal to the gastrojejunostomy, which poses a risk of perforation by pressure from the endoscope. Staples or sutures may be seen at the anastomosis. The roux limb can be examined using a deep enteroscopy technique. |
| Sleeve gastrectomy | The stomach will be a tubular structure with a long staple line at the greater curvature and the pylorus is intact. |
| Biliary and pancreatic diversion (BPD) and duodenal switch (DS) | A larger gastric remnant is present in the BPD, whereas in the BPD-DS the stomach is tube-like without a fundic pouch. In BPD the gastric remnant is anastomosed to the ileum giving a double-barrel view. In the BPD-DS, the pylorus is intact and the duodenum is stapled end-to-end to the ileum. In both cases, the biliopancreatic limb is out of reach. |