Post-void residual (PVR) scan
Quick answer: A PVR scan measures how much urine is left in the bladder just after you pass urine. Doctors order it for weak flow, frequent urination, urine leakage, prostate problems or repeated urine infections.
- SampleImaging (no sample)
- TakesAbout 5 to 10 minutes
- Before the testYou will be asked to pass urine just before the scan, so come with a full bladder.
How the test is done
- 1You arrive with a full bladder and pass urine in the toilet just before the scan
- 2You lie on your back straight away with your lower belly uncovered
- 3Gel is spread above the pubic bone and the probe measures the bladder
- 4The machine works out how much urine is left
What your results can mean
Reading your report
A sonologist or radiologist reports on the scan, and your doctor will explain what the findings mean for you.
If the result is outside the usual range
A high amount of urine left behind can be seen with an enlarged prostate, a blockage, weak bladder muscles, nerve problems or some medicines. A low amount usually means the bladder empties well.
Who usually has this test
Men with prostate symptoms, people with a weak stream, leakage, frequent urination or repeated urine infections, and some people after surgery.
Risks and aftercare
There is no radiation and no aftercare; you can go home as soon as the measurement is done.
Names and options
Also called: PVR scan, residual urine scan, bladder scan
Listed by the hospital as
- ULTRASOUND SCAN ESTIMATION OF PVR ALONE
Questions about this test
Why is the scan done right after I pass urine?
The aim is to measure what your bladder could not empty. If there is a delay, more urine collects and the result can look higher than it is.
What causes urine to be left in the bladder?
Common causes include an enlarged prostate in men, weak bladder muscles, nerve problems and some medicines. Your doctor will look at the result together with your symptoms.
Can urine left in the bladder cause infections?
Yes, urine that stays in the bladder can make infections more likely. This is one reason doctors measure it in people with repeated urine infections.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.