It is a good idea to meet your dean at least once in your first year, just to get to know her or him. You might even meet your dean in a different context: as a course instructor, prehealth advisor, graduate business school advisor or in some other capacity at Duke.
If you are experiencing academic difficulties, you should see your dean early so that s/he can offer you as many options as possible. Your dean may contact you and ask you to come in for a meeting. It is in your best interest to respond to communications from your dean and to make an appointment if requested. Your dean is in the best position to help you deal effectively with circumstances that are affecting your academic experience at Duke.
You can email, phone or schedule an appointment with your dean whenever you need to. Email works well for quick or immediate questions. All deans have times open for student appointments, so contact the staff assistant in your dean's office and explain that you'd like to meet with your dean and the staff assistant will set it up.