Hello! I have a question in regards to checking for postural changes in a Pt's BP. I'm almost finished with EMT class, and the checking for posturals has a become a big thing all of the sudden. We have been instructed to check posturals in Pts who are dizzy/weak, ab pain, or any Pt with suspected volume issues -unless they're already hypotensive, have cardiac issues, trauma, or 3rd Tri vaginal bleed-. SO, If there's a change of at least 20 mm/Hg in their systolic, does this indicate the need to call for ALS? I know this may depend on where you are, but I'm interested in what others have been taught. Thanks!