Sitzmarks Radiopaque Markers can be used for the diagnosis of many gastrointestinal (GI) conditions

Sitzmarks Radiopaque Markers

SITZMARKS® Radiopaque Markers are the simple, reliable, and affordable method of diagnosis of many gastrointestinal (GI) conditions, including chronic constipation, colonic inertia, hypomotility, outlet delay, and bowel obstruction.

This unique colonic transit diagnostic test helps professionals select the best therapeutic option for adult patients with severe constipation who have otherwise negative GI evaluations.


Each ingestible SITZMARKS® capsule contains 24 radiopaque markers that are visible throughout the digestive tract via X-ray. The markers are available in three different shapes, O-Ring, Double D and Tri-Chamber, to accommodate both the simple and segmental testing methods.


One or more low dose, flat plate abdominal X-ray occurs in the week that follows capsule ingestion to determine the extent of the elimination of the markers. The location of the markers in the patient’s digestive tract assists in the diagnosis of many GI conditions, including:

  • chronic constipation
  • colonic inertia
  • hypomotility
  • outlet delay, and
  • bowel obstruction




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