Psych Eval?
I took several test and had a lengthy discussion with the Psychiatrist. We talked about past diets, family history/problems ect We also spoke about my depression issues of today. I was ok'd for surgery. Can't wait to get it done. The biggest piece of advice I can give is just be honest. Those people are pretty keen at figuring out if your being truthful. I wondered afterwards if I had volunteered to much information, but he still approved for me to have surgery. God bless you on your journey.
They are actually in your corner. Don't worry that they're just waiting for an opportunity to yell, "No VSG for you!" It's not about hectic lives - heck - we all deal with that and would wait forever if we have to find the perfect timing. You'll do yourself the best service to be completely honest and open.
Best wishes and prayers with you and your family as your dad starts his treatments!