Effectiveness of Prokinetic Agents in Improving Abdominal Discomfort at Colonoscopy

Summary

Participation Requirements

Description

The participants will be randomly selected into one of the three arms of this report's diagram (1:1:1 ratio) drawing of a sealed, opaque envelope by one of the surgical residents in charge or by the attending surgeon. The participants in each group will receive an envelope containing pills of identi...

The participants will be randomly selected into one of the three arms of this report's diagram (1:1:1 ratio) drawing of a sealed, opaque envelope by one of the surgical residents in charge or by the attending surgeon. The participants in each group will receive an envelope containing pills of identical appearance, each of Domperidone 10 mg, Itopride 50 mg or placebo. Both the attending physicians and the participants are blinded to the kind of study medication contained in the envelope. From the regular protocol for colonoscopy preparation, no solid foods are allowed except low residue diet during three days before the procedure. On the next day, only liquid diet consumption is allowed. On the day prior to colonoscopy, the patients can have only clear liquid and ad libitum throughout the day until midnight. Additionally, the patients are instructed to take one pill at 8.00 AM, 12.00 AM, 4.30 PM respectively. They are also informed to begin consuming the 3 liters of PEG-EL at 5.00 PM and complete it within 3 hours. Lastly, they are instructed to take the fourth pill at 6.00 AM on the day of colonoscopy. At the colonoscopy unit, the patients will be interviewed regarding the severity of abdominal discomfort during the preparation period after consuming the 3 liters of PEG-EL using a 4-point scale (1=absent, 2=mild, 3=moderate, 4=severe). After finish the procedure, patients are informed to continue the study medication for three days consecutively. The interviewer will make a phone call to the individuals at the first and third day after the procedure to confirm compliance of the study medication and inquiry about the severity of abdominal discomfort after procedure by using the same 4-point scale. If the patient can't be reached by a phone call or fail to continue the medication, this patient is classified as a drop out. All data is collected by the main investigator from the patient chart and data recording form. Statistical analysis is performed using SPSS version 18. Patient characteristic and numerical data are reported by descriptive statistic such as mean, standard deviation. Parametric data is compared between groups using Chi-square, logistic regression analysis.Statistical significance is set at a level of p<0.05.

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