Different Bowel Preparations in Magnetically Controlled Capsule Endoscopy

Inclusion Criteria: 1. Age ≥ 18 years, male or female 2. One of the following examination indications: (1) Unexplained gastrointestinal bleeding; (2) Unexplained iron deficiency anaemia; (3) Suspected Crohn's disease or monitoring and directing treatment for Crohn's disease; (4) Suspected small bowel tumour; (5) Monitoring the development of small bowel polyposis syndrome; (6) Suspected or difficult to control malabsorption syndromes (e.g., celiac disease, etc.); (7) Detection of NSAID-associated small bowel mucosal damage; (8) Those with a clinical need to exclude small bowel disease. Exclusion Criteria: 1. People who are ineligible for surgery or refuse to undergo any abdominal surgery (once the capsule is retained it cannot be removed surgically); 2. Known or suspected gastrointestinal obstruction, stenosis, and fistula; 3. People with implanted cardiac pacemakers or other electronic devices; 4. People with swallowing disorders; 5. Women during pregnancy; 6. People who are unable or unwilling to provide informed consent.