Hello all! I am scheduled for an aorta valve replacement on Tuesday, 3/17. This is the 5th attempt. I have finally passed all the pre-op tests but was flagged on the BUN results. I have not heard from the surgeon’s office about another postponement. Does anyone know if having higher than the normal numbers will have an impact on my surgery? I have stopped drinking protein shakes as I read that too much protein will cause this. I have also upped my water intake as I may have been a little dehydrated, another cause. I’m hoping this will help, but just need reassurance that I’m still good to go. Thanks for any thoughts.