Carmel59,
I’ve had throat dilations for a few years now done by my Gastro doctor. Usually while doing that, at some point, he takes a biopsy of the stomach area of the Barrets Esphogus, which I need to check once a year as a few cases can progress to cancer.
It’s not for everyone, as I read, but my dr is pretty good, except when I awoke once from sedation with a tube down my throat, they just gave me more sedation.
Good luck