The catheter is gently moved into the bladder. A small amount of contrast dye is put through the catheter and flows into the bladder. A machine directs X-rays at different angles into the bladder over a period of time while your child's bladder empties. The images can be seen on a screen.

How is Micturating Cystourethrogram done?

A micturating cystourethrogram is a procedure allowing the urethra to be x-rayed using contrast dye passing from the bladder through the urethra. The bladder is first filled with x-ray contrast dye by inserting a urinary catheter into the bladder through the urethra.

How do you perform a MCU test?

A Micturating Cysto-Urethrogram (or MCU) is a study using X-rays and x-ray dye to show the bladder and urethra while passing urine. The test is performed to find out if the urine goes from the bladder back up to the kidneys instead of out through the urethra.