The SmartPill motility capsule is a non-invasive method of measuring whole gut motility. It is an in-office procedure in which a capsule is swallowed that measures pH, pressures, and time. With that information, your doctor will be able to calculate gastric transit time, small intestine transit time, and colonic transit time. It is a useful tool in getting more information with delayed gut motility such as in chronic idiopathic constipation or in delayed gastric emptying.