A novel volume-reduced CT colonography regimen using hypertonic laxative (polyethylene glycol with ascorbic acid):...

Area of Science:

• Gastroenterology
• Radiology
• Medical Devices

Background:

• Bowel preparation is crucial for accurate CT colonography (CTC).
• Traditional methods can be cumbersome and volumes high.
• Investigating novel, more efficient laxatives is essential.

Purpose of the Study:

• To assess the feasibility of a hypertonic laxative (polyethylene glycol with ascorbic acid, PEG + Asc) for CTC bowel preparation.
• To determine the optimal volume of PEG + Asc for effective colon cleansing.
• To evaluate the quality of residual stool and fecal tagging.

Main Methods:

• Patients undergoing CTC were randomized to receive 800 ml, 600 ml, or 400 ml of PEG + Asc.
• Oral sodium diatrizoate was administered for fecal tagging.
• A blinded reader assessed residual stool/fluid and tagging quality in six colorectal segments.

Main Results:

• All regimens (800 ml, 600 ml, 400 ml) demonstrated non-inferiority in colon cleansing effectiveness.
• 83-89% of segments were free of stool across the different volumes.
• Residual fluid and fecal tagging quality were within acceptable limits, with no adverse events reported.

Conclusions:

• A novel CTC regimen using a hypertonic laxative is feasible and effective for bowel preparation.
• Lower volumes of PEG + Asc provide excellent colon imaging quality.
• While effective, the lowest volume did not significantly improve patient acceptance.