how long does a barium meal and follow through take
6. A paediatric barium meal will take approximately 10â20 minutes unless it includes a âfollow-throughâ examination. A follow-through examination can take several hours (usually 2â8 hours, but sometimes longer), as the barium has to pass all the way through the small intestine.If your child requires a follow-through examination, you and your child could be at the hospital or radiology practice for some considerable time. follow-through examination can take several hours (usually 2â8 hours, but sometimes longer), as the barium has to pass all the way through the small intestine. If your child requires a follow-through examination, you and your child could be at the hospital or radiology practice for some considerable time.