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kidney ultrasound
Nephrology
Question #7151
33 days ago
48

kidney ultrasound - #7151

Anonymously

I recently had some lower back pain, and my doctor suggested a kidney ultrasound to check for any issues. I’ve never had one before, so I’m wondering—what exactly does a kidney ultrasound show, and why is it done? From what I understand, a kidney ultrasound is used to check for things like kidney stones, cysts, or infections. But does it also show kidney function, or is that something only blood tests can measure? If my kidneys look normal on the ultrasound, does that mean they’re healthy? I’m also wondering how a kidney ultrasound works. Is it similar to pregnancy ultrasounds, where a technician moves a probe over the skin? Do I need to drink a lot of water beforehand, or is fasting required? How long does it take, and is it uncomfortable? Another concern I have is whether a kidney ultrasound can detect early-stage kidney disease. If someone has mild kidney dysfunction, would the ultrasound show it, or would they need different tests like a CT scan or MRI? For those who have had a kidney ultrasound, what was your experience like? Did it help diagnose an issue, or did your doctor need to run additional tests?

Kidney ultrasound
Nephrology test
Kidney stones
Renal function
Ultrasound procedure
Kidney health
Imaging test
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Doctors’ responses

Dr. Evgeny Arsentev
I am a highly qualified medical professional with over 15 years of experience in General Medicine. My expertise spans diagnosing and treating a wide range of conditions, providing evidence-based care, and mentoring junior doctors. I am dedicated to ensuring patient well-being through a combination of clinical skills and compassionate care.
32 days ago
A kidney ultrasound is a helpful diagnostic tool to evaluate the structure of your kidneys and nearby organs. It can detect things like kidney stones, cysts, or infections, but it doesn't measure kidney function directly. For kidney function, blood tests like creatinine or eGFR are more useful. In terms of how it works, a kidney ultrasound is indeed similar to a pregnancy ultrasound. A gel is applied to your skin, and the technician will move a probe over the area to get images of your kidneys. You generally don’t need to fast, but your doctor might ask you to drink water beforehand, depending on the situation. The procedure itself is usually painless and can take around 20–30 minutes. As for early-stage kidney disease, an ultrasound can’t always detect mild dysfunction. It focuses on structural issues, so if you're concerned about kidney function, additional tests like blood work would be necessary. If everything looks normal on the ultrasound, that's a good sign, but it doesn't fully rule out kidney disease. If you’re still unsure, I’d recommend discussing your concerns further with your doctor, especially if you're experiencing ongoing symptoms.
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