How you prepare

By Mayo Clinic Staff
  • Don't eat or drink anything after midnight the night before the procedure.
  • Talk to your doctor about whether you can take your regular medications the night before or morning of the procedure.

Clothing and personal items

Wear comfortable, loosefitting clothing.

Avoid wearing the following items during the procedure:

  • Jewelry
  • Eyeglasses
  • Contact lenses
  • Makeup
  • Nail polish
  • Dentures
  • Wigs or hairpieces

Precautions regarding medications and allergies

Tell your doctor if you:

  • Are taking pills or injections to control diabetes
  • Are allergic to shellfish or iodine, which are chemically related to special dyes that may be used during the procedure
  • Have implanted medical devices in your body, such as a pacemaker, artificial heart valve, aneurysm clips, neurostimulators or stents
May. 23, 2013