Do I need to fast before a kidney ultrasound?
Usually not for a kidney-only ultrasound, but your doctor or lab may ask you to drink water to fill the bladder for better visualization.
Diagnostics
Kidney ultrasound guide
What a kidney ultrasound shows, when it is needed, and how to prepare.
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Short Answer
A kidney ultrasound is a non-invasive imaging test that shows kidney size, shape, cysts, stones, and obstructions, and is often the first imaging step in kidney evaluation.
Medical Facts
- Ultrasound can detect kidney stones, cysts, hydronephrosis (swelling from urine backup), and size asymmetry.
- It is safe, painless, uses no radiation, and is widely available even in smaller Indian cities.
- Ultrasound may miss small tumors or early-stage damage; CT or MRI may be needed for further evaluation.
Treatment or Donation Options
- Request a kidney ultrasound if you have unexplained flank pain, blood in urine, or abnormal kidney tests.
- Bring previous imaging reports for comparison to detect changes over time.
- Discuss whether additional imaging (CT, MRI) is needed based on ultrasound findings.
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