Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
An antro-duodenal motility study is used to evaluate the
ability of the muscles of the stomach and the first portion of the small intestine
(duodenum) to contract. Conditions in which there is abnormal contraction of the
muscles of the stomach and the small intestine are referred to as motility disorders. Therefore, an antro-duodenal motility study is used to identify motility disorders.
When is an antro-duodenal motility study used?
An antro-duodenal motility study is used to diagnose a motility
disorder of the stomach or small intestine, that is, a condition of abnormal function of
the muscles of the stomach and/or small intestine. Such abnormal
function usually is suspected when there are symptoms and signs of
obstruction to the
flow of food through the stomach and intestines. These symptoms usually are
nausea,
vomiting, and intestinal
distention
(enlargement). The obstruction is a direct result of the inability of the
abnormally functioning muscles to propel food through the stomach and
intestines. One common cause of motility disorders of the stomach and intestines
is diabetes mellitus.
How is an antro-duodenal motility study done?
For an antro-duodenal motility study, a thin tube
(one-eighth inch in diameter) is passed through the nose, down the
esophagus, through the stomach and into the duodenum, the first part of the small intestine.
Sensors in the tube measure the amount of pressure generated when the muscles of the stomach and intestine contract and squeeze tightly around the tube; the greater the contraction of the muscles, the greater the pressure sensed by the tube.
All contractions are recorded by a computer for
analysis.
Contractions are recorded at rest for up to several hours and for one or two hours after a meal. Thus, a study may take up to six hours.
Diabetes mellitus is a chronic condition characterized by high levels of sugar (glucose) in the blood. The two types of diabetes are referred to as type 1 (insulin dependent) and type 2 (non-insulin dependent). Symptoms of diabetes include increased urine output, thirst, hunger, and fatigue. Treatment of diabetes depends on the type.
Dyspepsia (indigestion) is a functional disease in which the gastrointestinal organs, primarily the stomach and first part of the small intestine, function abnormally. It is a chronic disease in which the symptoms fluctuate infrequency and intensity. Symptoms of dyspepsia include upper abdominal pain, belching, nausea, vomiting, abdominal bloating, early satiety, and abdominal distention (swelling). These symptoms are most often provoked by eating.
Gastroparesis is a medical condition in which the muscle of the stomach is paralyzed by a disease of either the stomach muscle itself or the nerves controlling the muscle. As a consequence, food and secretions do not empty normally from the stomach. Gastroparesis symptoms are nausea and vomiting; abdominal bloating, and pain can result.
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