Colonic transit study in patients with chronic constipation using Japanese-made radiopaque markers

Area of Science:

• Gastroenterology
• Medical Devices
• Clinical Trials

Background:

• Colonic transit studies (CTS) are crucial for diagnosing colonic motility dysfunction, like chronic constipation (CC).
• Current CTS methods rely on radiopaque markers, which are unavailable in Japan, hindering clinical practice.
• Development of domestically produced radiopaque markers is underway to facilitate CTS in Japan.

Purpose of the Study:

• To assess the safety of newly developed, domestically produced radiopaque markers for colonic transit time measurement.
• To establish the feasibility of using these markers in a clinical setting.

Main Methods:

• A safety study involving five patients with chronic constipation undergoing drug treatment.
• Participants ingested 24 radiopaque markers in a gelatin capsule on Day 1.
• Abdominal radiography was performed on Day 5 to count residual markers and assess for adverse effects.

Main Results:

• No radiopaque marker-related adverse effects were observed in any participants.
• The safety of the markers was deemed acceptable, meeting the study's primary outcome.
• One patient had a single, visible residual marker on Day 5, indicating good clearance.

Conclusions:

• The domestically produced radiopaque markers exhibit a favorable safety profile for use in colonic transit studies.
• These findings support the potential of these markers for clinical application in Japan.
• Further research is warranted to confirm the efficacy of these markers in evaluating colonic transit time.