Reflux & esophageal testing

At minimum, objective proof of GERD (from endoscopy or pH monitoring), esophageal manometry to check swallowing function, and an assessment of any hiatal hernia; other tests are added when symptoms call for them.

The details vary from person to person, but most evaluations before an anti-reflux procedure include:

• Upper endoscopy — to grade any inflammation, look for Barrett’s esophagus, and measure a hiatal hernia
• pH monitoring — required when endoscopy doesn’t already prove GERD, to confirm that reflux is abnormal
• High-resolution manometry — to rule out achalasia and make sure the esophagus can push food through a tightened valve
• Imaging — often a barium study, and sometimes CT, to define the anatomy of a larger hernia

A gastric emptying study may be added if nausea, bloating, or early fullness suggests the stomach empties slowly, and impedance-pH testing may be used when symptoms persist on medication. If you’ve already had some of these tests, the results can usually be reviewed rather than repeated.

Every anti-reflux procedure adds some resistance where the esophagus meets the stomach, so the esophagus must be able to push food through it; manometry shows whether it can, and helps choose the type of procedure.

Think of the esophagus as a muscular tube that pushes food down in a coordinated wave. A fundoplication, LINX device, or incisionless procedure tightens the valve at the bottom so stomach contents can’t come back up — but food still has to get through going down.

• If the esophagus squeezes normally, most procedure options remain open.
• If it squeezes weakly or inconsistently, surgeons may favor a partial wrap or look more carefully at the risks of other options.
• If it doesn’t squeeze at all, or the valve fails to relax (as in achalasia), a standard anti-reflux procedure can cause serious swallowing problems, and the treatment plan changes entirely.

Manometry also reveals spastic or obstructive patterns that explain symptoms reflux wouldn’t. That’s why guidelines recommend it before any anti-reflux procedure.

It depends on the question the test is answering — tests to prove GERD are usually done off PPIs, while tests to explain persistent symptoms are sometimes done on them. Follow your testing team’s instructions.

When the goal is to find out whether you have GERD at all, acid-suppressing medication can mask the answer, so the test is typically done after stopping it — AGA guidance suggests 2 to 4 weeks off PPIs when possible. When GERD is already proven and the question is why symptoms persist on treatment, impedance-pH testing may be done while you keep taking your PPI.

Some people find stopping medication hard. Antacids or other short-acting options are often allowed in the meantime, but check first. And if you’ve been told you have severe esophagitis or Barrett’s esophagus, don’t stop your medication without talking to your clinician.

It usually means abnormal acid reflux is not the main cause, which points toward other explanations — such as a sensitive esophagus, a motility disorder, or a non-esophageal cause — and makes anti-reflux surgery unlikely to help.

A normal study is useful information, not a dead end. Possible explanations include:

• Reflux hypersensitivity — normal amounts of reflux, but symptoms line up with reflux events because the esophagus is extra sensitive
• Functional heartburn — burning with normal reflux levels and no link between reflux events and symptoms
• A motility disorder or eosinophilic esophagitis, found on manometry or biopsies
• Slow stomach emptying, belching disorders, or rumination
• Causes outside the esophagus, including heart, lung, or upper-airway conditions

These conditions are treated with approaches aimed at the specific cause — sometimes medications that calm nerve sensitivity, behavioral therapies, or treatment of a different condition. Surgery that tightens the valve generally isn’t helpful when acid exposure is normal.