ALIMENTARY FUNCTION TESTs
PREPARED BY MR. ABHIJIT DAS
Alimentary function tests, also known as
digestive function tests, are a group of diagnostic procedures used to evaluate
the overall function of the digestive system. The digestive system is
responsible for breaking down and absorbing nutrients from the food we eat, and
it plays a crucial role in maintaining our health and well-being.
These tests are conducted when there are
concerns about the proper functioning of the digestive system, such as unexplained gastrointestinal symptoms, malabsorption issues, nutritional
deficiencies, or suspected gastrointestinal
disorders. The goal of alimentary function tests is to identify any
abnormalities or disorders that may affect the digestion, absorption, and
elimination of food and nutrients.
1. Lactose
Tolerance Test: This test is used to diagnose
lactose intolerance, a condition in which the body
has difficulty digesting lactose, a sugar found in milk and dairy
products. During the test, the individual drinks a lactose-containing solution,
and their blood glucose levels are measured at regular intervals to assess how
well their body can digest lactose. [lactose=glucose+galactose]
2. Breath
Tests: These tests are commonly used to assess carbohydrate malabsorption, particularly lactose and
certain sugars. After ingesting a specific carbohydrate, the breath is analyzed
for the presence of gases such as hydrogen or methane.
Increased levels of these gases can indicate malabsorption.
3. Serum
Nutrient Testing: Blood tests are conducted
to measure the levels of various nutrients, including vitamins, minerals, and
electrolytes. Abnormal levels may indicate malabsorption or nutritional
deficiencies.
4. Gastric
Emptying Study: This test evaluates the rate at
which food empties from the stomach and moves into
the small intestine. It involves consuming a meal containing a small amount of radioactive material,
which can be tracked using imaging techniques to assess gastric motility.
5. Esophageal
Manometry: This test assesses the muscular function of the esophagus. A thin tube with pressure sensors is inserted into
the esophagus to measure the strength and coordination of muscle contractions
during swallowing.
6. Stool
Analysis: A sample of stool is examined to detect
abnormalities such as blood, parasites, bacteria,
or signs of malabsorption.