Various protocols have been described. The variation arises from the number of capsules ingested, the number of marker shapes used, and the timing of the X-Ray.
- Single capsule, single marker shape, single X-Ray
- This is our preferred protocol
- On day 1, children ingest 1 capsule containing 20 markers of the same shape
- An X-Ray is taken on day 5
- Multiple capsules, each with a different marker shape, single X-Ray
- On day 1, 2 and 3, children ingest markers of different shapes
- An X-Ray is taken on Day 7