low urine output

The docs are concerned about a low urine output.  So they are gong to run blood work. Did anyone else go through this?

I did but they decided right away that I was severly dehydrated and did several IV bags of fluid.  The first one the nurse stood there and pushed through.  Within a few hours I was peeing normally again.  It delayed my release. 

I tend to get dehydrated pretty easily so I'm not surprised.