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WLS Glossary
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D

Term Definition
distal(dis·tal)
distant,  remote; farther from any point of reference; opposed to proximal.
Dumping syndrome
In the normal person sugary foods are released slowly from the stomach into the small intestine.  After gastric bypass these sugars pass quickly into the jejunum and sometimes cause "dumping syndrome".  Symptoms include bloating, cramps, sensation of lightheadedness, fast heart rate, sweating, and sometimes hypotension.  These symptoms last 10 to 45 minutes. Patients will often want to take a nap and "sleep it off". Dumping affects about 75% at first, but most patients find that the syndrome gradually resolves over the first six months. Very few patients have significant long term symptoms.  Very sweet and carbohydrate rich foods most often cause dumping. These could be sodas, candy, sweet fruits, milk shakes, cereals.  

The physiology of dumping includes release of vasoactive substances from the small intestine into the blood stream in response to hyperosmolar foods such as sugars and starches and an inrush of fluid into the small bowel that dilutes the sugars and causes lowered blood pressure. Some of the vasoactive substances include serotonin, bradykinin, substance P, pancreatic polypeptide, insulin, glucagon, neurotensin, and enteroglucagon. This is a complex syndrome that is incompletely understood.