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Determination of the ideal preparation for colonoscopy in a rat model
Ramon Bartolí1, Jaume Boix, Gemma Odena
1Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas-CIBEREHD, Department of Gastroenterology, Hospital Universitari Germans Trias i Pujol, Barcelona, Spain.
Background:
Quality bowel preparation is essential to examine the entire colon adequately. No trials comparing different purgative regimens are available in animal models. The aim was to compare 5 methods for bowel cleansing to develop a rat model to study therapeutic colonoscopy.
Methods:
Twenty-five rats were assigned to one of 5 regimens: (1) high-volume polyethylene glycol electrolyte solution (HV-PEG-ES, 40 mL); (2) low-volume PEG-ES (LV-PEG-ES, 20 mL); (3) high-volume PEG-ES+ascorbic acid (HV-PEG-ES+AA, 20 mL); (4) LV-PEG-ES+AA, 10 mL; (5) rectal enema with saline solution (RE-SS). Bowel preparation quality was rated by total colonoscopy.
Results:
RE-SS is the best regime for left colon cleansing, whereas HV-PEG-ES and HV-PEG-ES+AA solutions resulted in significantly better cleansing in the whole colon. HV-PEG-ES+AA regimen needed less volume, and administration was easier.
Conclusions:
A total of 20 mL of PEG-ES+AA before colonoscopy is the best regimen to explore the whole colon, whereas to explore the left colon RE-SS is adequate.
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