KUB ultrasound is done to examine the kidneys, ureters, and bladder.
On either side of the spine are the kidneys that help remove waste products and clean the blood. The ureter is a tube that carries urine from the kidney to a storage bag called the bladder.
Normally, the bladder removes most urine from the body. PVR is the amount of urine that remains in the bladder after urination. It is measured using KUB ultrasound.
A PVR of less than 50 ml is considered adequate in adults. PVR greater than this is associated with a bladder or ureter problem, such as bladder damage or urinary tract obstruction.
In an ultrasound scan, high frequency sound waves are passed through the body parts with the help of a transducer probe. These waves pass through the organs and pictures of the inside are displayed on a computer screen.
Why are KUB and PVR ultrasound done?
KUB ultrasound with PVR is recommended at certain times:
To know the location, size and shape of the Kub,
To determine the size of the prostate gland in men (a large gland surrounding the urethra, the tube that carries urine out of the body),
To aid in needle placement during the biopsy,
For kidney test after transplant,
Seeing again and again, feels good at night,
frequent small amounts of urine,
Persistent feeling that the bladder is not empty or that the bladder does not empty despite effort
haziness after urinating,
inability to stop the urge to urinate,
passing urine when coughing, sneezing, or laughing
Passing urine during sex, especially in orgasm
less urination,
feeling of pressure while urinating,
stopping while urinating,
First preparation from KUB and PVR ultrasound:
Fasting or anesthesia is not required for KUB and PVR ultrasound tests. The doctor will ask you to drink a lot of water before the test. Do not empty your bladder or urinate before the test.
How is KUB and PVR ultrasound done?
You will be asked to lie on the scanning table.
A gel will be applied to the abdomen and a probe will be placed over it.
The probe will transmit images of the inside of the abdomen along with sound waves to a computer screen.
After taking enough pictures you can urinate and after that you have to take pictures again to check PVR value.
Ultrasound for KUB may take 10 to 20 minutes.
How does it feel during KUB and PVR ultrasound? - What does it feel like to have a KUB and PVR ultrasound?
KUB is a painless test. Although you may feel a little uncomfortable. The gel can make you feel cold and wet.
CUB and PVR ultrasound scan results
Based on the symptoms doctors diagnose the following symptoms:
Kidney stone
Ectopic ureter (where the ureter ends in a different place than the bladder)
hydronephrosis (swelling of the kidney)
noncancerous prostatic hyperplasia (enlargement of the prostate gland)
neurogenic bladder (loss of bladder control due to nerve damage)
Fowler's syndrome (inability to relax the bladder sphincter)
ureter and bladder stones
blood clots
prostate cancer
Spinal cord injury
vesicoureteral reflux
Benefits and Risks of KUB and PVR Ultrasound Scan:
Advantages of ultrasound test such as:
No incision is made in this imaging test.
There is no radiation so it is safe during pregnancy.
Contrast dye is not used in this, so people who are allergic to contrast dye can also use it.
What happens after KUB and PVR ultrasound?
After the test, you can go about your daily activities and eat normal food.
Who else is tested with KUB and PVR ultrasound
For KUB, a biopsy is done with ultrasound.