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To Scope or Not to Scope?



The recently published Perioperative Bariatric Guidelines recommend that in patients planning to undergo bariatric surgery:

– All gastrointestinal symptoms should be evaluated and treated before surgery (Grade D)

– All patients who have liver function tests 2-3 times the upper limit of normal should undergo liver ultrasonography and a viral hepatitis screen (Grade D)

– There is inconsistent evidence to recommned routine screening for h pylori (Grade D)

Interestingly, the guidelines make no recommendation on whether or not patients should undergo routine upper GI endoscopy.

A paper just published in OBESITY SURGERY, suggests that this may be a good idea.

In this study, Rodrigo Muñoz and colleagues from the Pontificia Universidad Católica de Chile, Santiago, Chile, retrospectively examined endoscopic records of 626 patients, who underwent Roux-en-Y gastric bypass between February 1999 to June 2006.

Abnormalities were found in 46% patients, the most common findings being gastritis (21%), esophagitis (16%), and hiatal hernias (11%).

Less frequent findings included duodenitis (7.8%), gastric ulcers (2.7%), duodenal ulcers (2.6%), gastric polyps (1.3%), Barrett’s esophagus (0.16%), and gastric cancer (0.16%).

Age was the only (albeit marginal) predictor of abnormal endoscopy.

Based on their finding, the authors feel that routine preoperative endoscopy should be performed in all patients prior to bariatric surgery.

Obviously, several caveats apply to these observations: although data was collected prospectively, this is a retrospective analysis. As not all patients undergoing surgery were routinely scoped, it is not clear if there was a selection bias in this sample. Also, it is not clear if the clinical outcomes would have been any different, had these diagnoses been missed prior to surgery.

Nevertheless, the study does highlight an important area of controversy in this field. Would I want my stomach scoped before I commit to bariatric surgery – probably yes (definitely if I had any upper GI symptoms). Is there hard evidence to support this notion – clearly no.

Appreciate any comments from my surgeon readers.

AMS
Edmonton, Alberta

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