Trio smart is a breath test they use to test for h pylori. I have had a couple. They put 3 gases in a bag while they give you a liquid to drink after you suck in the gas and then you blow back into the bag. The GI doc. told me if is comes up neg. they can almost rule out stomach or pancreas cancer. Plus, I know how suffocating 10lbs of water weight on me feels like so.i could only Imagine how it does your little self. Take care and hope you have great rest results.