From our porcine and two human trials it is clear that to obtain reasonable views of the stomach to be able to guide the capsule the stomach needs to be distended. In our porcine study we achieved good results with 1000mls of water. We felt that this would be an acceptable amount for a patient to drink prior to magnetically assisted capsule endoscopy, and the two human trials we have completed to date have proven excellent tolerance to this volume of water.