I'm home, Hank stays

I am home from the vet, but Hank stayed down there.We are not sure what is going on with Him. They did the reflux tube, and he had a bit of stuff that came back out, indicating not everything is passing on through like it should. They did rectal palpation of course,and really did not feel anything for sure. Checking up with the portable ultrasound and did not find anything. Did a stomach tap,where they jam a needle up under his girth area on his belly and draw fluid out and it was the right color. Not red, orange, or green. Clear, slightly yellow. They are just not sure, as he is not showing any sign to really indicate what type of colic he has going on. Could be a twist, or just gas, or an infection. They asked if surgery was an option. I don't want to think about it. Hopefully we won't need to make that decision.