Nurse/dietician/social worker appointments
I am going through Hamilton so I can only tell you my experience there. The nurse was very brief, she weighed and measured me and told me about the surgery and post-op. The dietician went through the diet that we have to follow pre-op and the different stages we have to follow post-op. She just made sure that I understood that there are major changes required. She told me to start taking my supplements and cut out alcohol and caffeine right then in preparation for surgery. The social worker was more involved. She questioned me about my mental health, my past, my current family situation, my support system and stuff like that. Hope that gives you an idea of what to expect. :)
My ultrasound was done long before I went to see the nurse, dietician and social worker because the next appointment you get after that is usually the internist and she needs the results. Ask the nurse about it when you see her. You will get your internist and scope appointment shortly after this one.