[Methods for the evaluation of the intestinal function in the horse (author’s transl)].

The study reviews diagnostic tests used for identifying gastrointestinal diseases in horses, emphasizing on absorption tests because of their relative ease and reliability in measuring intestinal absorption. D(+)-xylose absorption test is preferred due to its clear absorption curve. The use of isotopes for assessing gastrointestinal protein loss and the potential of alkaline phosphatase as a diagnostic tool are also discussed.

Understanding Gastrointestinal Health in Horses

• This research article centers on investigating different diagnostic methodologies that can be used to ascertain the health condition of a horse’s digestive mechanism, focusing on the gastrointestinal tract. The study reviews existing diagnostic tools in order to identify the ones that are the most reliable and effective.
• Rectal exploration and paracentesis are acknowledged as commonly used diagnostic methods. Despite their utility, the research takes a special interest in absorption tests. These tests offer a relatively quicker and more exact measure of the absorptive capabilities of intestinal linings.

Active Absorption Tests

• A specific focus is laid on some specific absorption tests, namely glucose, D(+)-xylose, and carbohydrate digestion-absorption tests. These tests are compared for effectiveness and the D(+)-xylose absorption test is highlighted as the preferred choice due to the clarity and consistency of its absorptive curve.
• The article also provides an example by showing the absorption curve of a horse suffering from alimentary lymphosarcoma.

Assessing Protein Loss and Alkaline Phosphatase Levels

• Additionally, the research mentions the significant role of labeled albumin and gammaglobulins in determining gastrointestinal protein loss, which can be an indicator of gastrointestinal diseases. The use of isotopes such as 131I and 51Cr to carry out this assessment is further reviewed.
• Lastly, the article proposes the idea of employing alkaline phosphatase more intensively as a diagnostic tool. Alkaline phosphatase is an enzyme found in a number of body tissues, including the liver and bones, but when found in high concentrations in the blood, it can be an indicator of diseases such as bone and liver disorders.