What is dumping syndrome?
Dumping syndrome is a set of gastrointestinal and vasomotor symptoms caused by rapid emptying of stomach contents into the small intestine. It is common after gastrectomy, Roux-en-Y gastric bypass for obesity and esophageal surgery, and occasionally occurs without surgery. This article is general information, not medical advice.
Early vs late dumping
| Form | Timing | Mechanism | Symptoms |
|---|---|---|---|
| Early | 10-30 min after eating | Hyperosmolar food draws fluid into the gut; gut hormones are released | Bloating, cramps, diarrhea, nausea, palpitations, flushing, dizziness |
| Late | 1-3 h after eating | Rapid sugar absorption triggers excess insulin, followed by hypoglycemia | Sweating, tremor, hunger, poor concentration, in severe cases reduced consciousness |
Diagnosis
- Surgical history plus post-meal symptoms are the main clues.
- The Sigstad score adds points for individual symptoms; a total above 7 suggests dumping.
- An oral glucose tolerance test can show a rise in heart rate or late hypoglycemia.
Treatment
- Diet: five or six small meals a day, fewer simple sugars, more protein and fiber, and fluids about 30 minutes after rather than with meals.
- Medication: acarbose for late hypoglycemia and somatostatin analogues such as octreotide when diet is not enough.
- Surgery: considered in rare refractory cases.
An international expert consensus (Scarpellini et al., 2020) lays out this stepwise approach.
References
- Scarpellini, E., Arts, J., Karamanolis, G., et al. (2020). International consensus on the diagnosis and management of dumping syndrome. Nature Reviews Endocrinology, 16(8), 448-466.
- Sigstad, H. (1970). A clinical diagnostic index in the diagnosis of the dumping syndrome. Acta Medica Scandinavica, 188(6), 479-486.
- Tack, J., Arts, J., Caenepeel, P., De Wulf, D., & Bisschops, R. (2009). Pathophysiology, diagnosis and management of postoperative dumping syndrome. Nature Reviews Gastroenterology & Hepatology, 6(10), 583-590.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Dumping Syndrome. niddk.nih.gov.