Patients with metal implants, metal stent, artificial joints, bone plates, and bone screw

Patients with electronic devices, such as pacemakers, cochlear implants, or other implanted electronic medical devices

Throat or esophageal obstruction leading to dysphagia patients

Consciousness disturbance patients unable to swallow

Patients with acute upper gastrointestinal bleeding

Patients with platelet lower than 40K or PT INR \> 1.5

Wired Magnetically Assisted Capsule Endoscopy and Esophageal Varices