I found the 4 Chan post where this was first mentioned in regards to potus. Perhaps his IV was for backup blood reserves for his motorcade or AF1. But as mentioned, large quantities wouldn’t normally be drawn from the hand. Bill looks like he’s on the verge of death (god willing) so who knows what all he gets pumped with.
This picture shows it, wish I had a higher res
first thing I though about when I saw bills hand was hmmm he most be undergoing adrenachrome withdrawal