Bowel cleansing before CT colonography: comparison between two minimal-preparation regimens

Area of Science:

• Gastroenterology
• Radiology
• Medical Imaging

Background:

• CT colonography requires effective bowel preparation for diagnostic accuracy.
• Standard bowel preparations can be burdensome for patients.
• Reduced-volume preparations aim to improve patient compliance and comfort.

Purpose of the Study:

• To compare the efficacy and tolerability of two reduced bowel preparation regimens for CT colonography.
• To evaluate a new regimen involving polyethylene glycol (PEG), bisacodyl, and Iopamidol against a standard iodine-only preparation.

Main Methods:

• A prospective, randomized, noninferiority study involving 52 adult patients undergoing CT colonography.
• Group 1 received a low-volume preparation (1-L PEG, bisacodyl, 90 mL Iopamidol) on the day of the exam.
• Group 2 received a standard iodine-only preparation (180 mL Iopamidol) the day before the exam.

Main Results:

• Diagnostic quality preparation was achieved in 97.4% of segments in the PEG/bisacodyl/Iopamidol group versus 95.5% in the iodine-only group (not significant).
• Optimal per-patient preparation quality was observed in 76.9% of patients in Group 1 and 84.6% in Group 2 (not significant).
• Patient tolerability was similar between the two preparation groups.

Conclusions:

• A reduced bowel preparation regimen with low-dose PEG, bisacodyl, and Iopamidol is feasible and effective for CT colonography.
• This regimen provides bowel cleansing comparable to traditional iodine-only preparations.
• The tested reduced preparation demonstrates similar patient tolerability to standard methods.