On an IV without eating you can lose, at a minimum, 1-2 pounds a day in a hospital. Back in my early skinny cycling days I was a very lean 162 pounds and got struck with appendicitis. Because it burst I was on IV only for 7 days. Came out weighing 147- and could barely hold myself up walking.
Hyper, I am glad you're alive. Getbig would have missed you.