How you prepare

By Mayo Clinic Staff

How you prepare for an ultrasound depends on which area of your body needs evaluation:

  • Most ultrasound exams require no preparation.
  • Other exams — such as of the gallbladder — require that you forgo food and liquids for up to six hours before the exam.
  • Still other exams — such as a pelvic ultrasound — require that you not urinate before the exam to ensure that your bladder will be full, allowing better visualization of the uterus, ovaries or prostate.

When scheduling your ultrasound, ask your doctor for specific instructions for your particular exam.

Feb. 23, 2012