Depends: This depends on what organ is being tested. If it is a cardiac echo, no prep is needed. If it is an abdominal or bladder ultrasound, you may be asked to drink a rather large amount of fluid beforehand to improve visibility of the study. If you are not sure, ask your doctor beforehand.
Answered 3/27/2013
5.2k views
Nothing to worry: Echo is ultrasound of the heart. Can be done anytime and no need for any preparation.
Answered 9/13/2017
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