Hi, my dd is having a pH probe test on monday, and I was wondering if anyone had anymore info that I don't have. I know that a nasogastric tube with pH probes (sensors) will be inserted into her stomach for 24hrs. She will have her arms splinted so she cannot remove the tube, and will have a computer strapped to her belly. But I don't know if she has any sedatives or how she'll react to it. I don't know how long the insertion and removal will take. Can anyone help me?