system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does basically everyone in a hospital get an IV regardless of their situation?

Is there anything to it other than keeping patients hydrated and getting medicine into their system when necessary?
gpt
A lot of the time it's just to have an established line, so that if things go south, you don't have to waste the time to start one. With some people it's not easy to get a line in, especially once their BP starts to crash, and they need medicine right now.