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When doctors want a real-time view of a part of your body in action, they turn to ultrasound – which makes images of your body using sound waves. Perfect for viewing blood flow, it also plays a vital role in monitoring internal organs such as the kidneys, liver, pancreas and the like. Because it uses no radiation or electromagnetic energy, ultrasound has become indispensable in monitoring developing fetuses during pregnancy.
Preparing for your Ultrasound
What you do leading up to your ultrasound depends on what organ or system is being imaged. Here are the most common procedures:
Abdomen
- No food or liquids after midnight the night before your exam.
Abdomen & Retroperitoneal
- No food or liquids after midnight the night before your exam.
Abdomen & Pelvic
- No food after midnight the night before your exam.
- Start drinking 32 ounces of water 1½ hours before your appointment, and finish the water 1 hour before your exam.
- Do not empty your bladder until the study is completed.
Renal
- Start drinking 20 ounces of water 1½ hours before your appointment, and finish the water 1 hour before your exam.
- Do not empty your bladder until the study is completed.
Pelvic
Transabdominal & Endovaginal Sonogram
- Start drinking 32 ounces of water 1½ hours before your appointment, and finish the water 1 hour before your exam.
- Do not empty your bladder until the study is completed.
Obstetric
- Start drinking 32 ounces of water 1½ hours before your appointment, and finish the water 1 hour before the study.
- Do not empty your bladder until the study is completed.
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