So sorry to hear baby bailey needs a barium meal but don't worry. You can give her a feed up to 3 hours before, the procedure which will take about 10 to 15 minutes. A member of staff will hold babies head and arms gently, you will be able to hold her legs and keep her happy, another member of staff will feed the barium which is usually a little thicker than normal milk and sometimes flavoured, either through a large syringe or bottle.If there is any chance you may be pregnant you will not be able to stay. The after effects will be white poo as joko has mentioned and probably lots of windy pops. Good luck and please let us know how you get on.