There are some, e.g. the Medtronic Smartpill for motility testing: http://www.medtronic.com/covidien/en-us/products/motility-testing/smartpill-motility-testing

There are some, e.g. the Medtronic Smartpill for motility testing: http://www.medtronic.com/covidien/en-us/products/motility-testing/smartpill-motility-testing-system.html http://www.medtronic.com/covidien/en-us/products/motility-te...