The Best Dosage and Timing of Polyethylene Glycol for Bowel Preparation Before Capsule Endoscopy

Exclusion Criteria

• •Age \< 18 or \> 75 years
• •Known or suspected GI stricture or fistula
• •A history of GI tract resection
• •Swallowing disorders
• •Intensive therapy with fasting and parenteral nutrition;with a disease that may reduce movement of the GI tract, such as diabetes mellitus
• •Medications that could affect gastrointestinal movement within one week
• •Implanted with a medical electronic device
• •Active inflammatory bowel disease, toxic megacolon, toxic colitis
• •Severe pulmonary, cardiac, renal, or hepatic disease
• •Uncontrolled hypertension (systolic blood pressure\>170 mm Hg, diastolic blood pressure\>100 mm Hg);
• •Disturbance of electrolytes
• •Pregnancy or lactation
• •Patients inability to provide written voluntary informed consent
• •Participation in another clinical study