MCU-RGU
MCU (Micturating Cystourethrogram) and RGU (Retrograde Urethrogram) are specialized X-ray imaging tests used to visualize the urethra and urinary bladder. These investigations help doctors identify strictures (narrowing), blockages, or abnormalities in the urinary passage that may cause difficulty in urination or infections.
Retrograde Urethrogram (RGU)
The RGU test focuses on the urethra, the tube that carries urine out of the body. A contrast dye is gently introduced into the urethra through a small catheter, followed by X-ray imaging. This allows your doctor to see:
- Any urethral narrowing or stricture
- The length and location of the narrowing
- Structural abnormalities or previous injury effects
Micturating Cystourethrogram (MCU)
The MCU test evaluates how the bladder and urethra work during urination. A contrast dye is filled into the bladder via a catheter, and X-ray images are taken while the patient passes urine. It helps assess:
- Bladder emptying and reflux (backflow of urine to kidneys)
- Posterior urethral valves or structural defects
- Post-surgical evaluation after urethroplasty or other reconstructive procedures
Why Your Doctor May Recommend MCU–RGU
- Recurrent urinary tract infections (UTIs)
- Weak or interrupted urine stream
- Suspected urethral stricture disease
- Injury or trauma to the urinary tract
- Follow-up after urethral or prostate surgery
What to Expect
Both tests are usually performed under fluoroscopy (real-time X-ray guidance). The procedures are quick, safe, and well-tolerated. Mild discomfort or a burning sensation during urination may occur afterward, but this settles within a day.
