Table 2

Typical postoperative endoscopic findings

Laparoscopic adjustable silicone gastric bandingExternal 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 bypassThe 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 gastrectomyThe 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.