The malfunctioning engine: gastroduodenal DGBIs

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The malfunctioning engine: gastroduodenal DGBIs

Author: Dr. Bahir Hadi, Consultant Surgeon, PhD · Date: June 2026

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Abstract

If you feel uncomfortably full after only a few bites or struggle with unexplained nausea, your stomach's nervous system may be misfiring. Under the Rome V criteria these issues fall into Gastroduodenal Disorders of Gut-Brain Interaction (DGBIs) - conditions affecting the stomach and duodenum without demonstrable structural disease [1, 2].

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The stomach's two major jobs

Your stomach has to do two things well: stretch to accommodate food (accommodation) and grind that food down to pump it into the intestines (emptying) [2]. In gastroduodenal DGBIs, the fine coordination between nerves, muscles and brain fails [1].

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Key conditions

• Functional dyspepsia (FD) - the giant of this category, split into two subtypes [2]:
  • Postprandial distress syndrome (PDS): uncomfortable fullness or early satiety after normal meals.
  • Epigastric pain syndrome (EPS): burning or aching pain in the upper stomach area, not necessarily tied to eating.
• Chronic nausea and vomiting syndrome: persistent nausea or vomiting without infection, ulcer or mechanical blockage [2].
• Cyclic vomiting syndrome (CVS): sudden, unpredictable, intense vomiting attacks with completely symptom-free periods in between [2].

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Work-up

The modern approach is a positive diagnosis under Rome V - not endless exclusion testing [1]. Oral gastroscopy rules out peptic ulcer, Helicobacter pylori and reflux damage. Alarm features (weight loss, bleeding, onset over 55) always warrant further work-up [1].

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Treatment

Because the root cause sits at the intersection of motility and brain signalling, management typically combines [2]:

• Dietary adjustments (smaller, more frequent, lower-fat meals).
• Prokinetic drugs that help the stomach empty.
• Acid suppression (PPIs) in the EPS subtype.
• Neuromodulators (e.g. mirtazapine, low-dose TCAs) to dampen visceral hypersensitivity.

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Work-up at Kirurgen.dk

We investigate stomach symptoms with oral or nasal gastroscopy, Helicobacter pylori breath test and functional work-up. Continue the DGBI series: Oesophageal DGBIs, Bowel DGBIs, Centrally mediated pain.

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References

1. Rome Foundation. Rome V Diagnostic Criteria for Disorders of Gut-Brain Interaction. Drossman DA, Tack J, Chang L et al. (eds.), 2026 update.
2. Stanghellini V, Chan FK, Hasler WL et al. Gastroduodenal Disorders. Rome IV/V chapter on functional dyspepsia (PDS/EPS), chronic nausea and cyclic vomiting syndrome. Gastroenterology - consensus article.