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Antro-Duodenal Manometry

An antro-duodenal manometry examination is used to evaluate the motor activity of the small bowel.
Measuring abnormal contractions or abnormal motor patterns in the antrum or the small intestine is helpful to diagnose normal or abnormal small bowel function. Motility disorders as irritable bowel syndrome (IBS or spastic colon), diffuse motor dysfunction can be diagnosed.

Migrating Motor Complex

The normal Migrating Motor Complex (MMC), the mechanism by which food is processed through the gastrointestinal tract, has a period of about 1.5 hours. It can be divided into 3 phases:
  • Phase I, resting phase (40 minutes).
  • Phase II, random contractions (40 minutes).
  • Phase III, activity front (10 minutes). Migration of the food. In the stomach this takes place at 3 cycles per minute and in the duodenum the speed normally is 12 cycles per minute.
An antro-duodenal manometry recording takes about 3 to 5 hours.

Solar GI, intelligent manometry system

With the Solar GI antro-duodenal examination software, phase I, II and III and MMC cycles can be recorded. Solid state or water perfusion catheters with 4 to 21 channels can be used.


By using the TMPD option of the Solar GI it is possible to monitor the position of the catheter during measurement. TMPD means Trans Mucosal Potential Difference. Electrical signals in the antrum and the duodenum are recorded. The catheter is in the right position if the potential difference reaches a value above a certain level.

Antro-Duodenal Manometry