Retrograde urethrogram

Retrograde Urethrogram (RUG) is a radiographic study of the urethra involving the administration of contrast media to visualize the urethral passage. This diagnostic procedure is primarily used to identify abnormalities such as strictures, obstructions, or injuries within the urethra. The retrograde urethrogram plays a crucial role in the evaluation of the male urethra, especially in cases of trauma, difficulty in urination, or suspected congenital anomalies.

Indications

Retrograde urethrogram is indicated in various clinical scenarios, including:

• Suspected urethral stricture or obstruction
• Evaluation of urethral injury following trauma
• Investigation of causes for dysuria or difficulty in urination
• Assessment of the urethra prior to certain surgical procedures
• Diagnosis of congenital urethral anomalies in pediatric patients

Procedure

The RUG procedure involves the following steps:

1. The patient is positioned on the X-ray table, usually lying on their back.
2. A sterile technique is used to cleanse the genital area.
3. A small, flexible catheter or a special syringe is gently inserted into the urethral opening.
4. Contrast media is slowly injected into the urethra while fluoroscopy (a type of X-ray) is used to visualize the passage of the contrast through the urethra.
5. Images are taken in various positions to ensure comprehensive visualization of the urethra.

Risks and Complications

While a retrograde urethrogram is generally safe, there are potential risks and complications, including:

• Urethral injury or perforation
• Allergic reaction to the contrast media
• Urinary tract infection
• Pain or discomfort during and after the procedure

Interpretation of Results

The interpretation of a retrograde urethrogram involves analyzing the images for any abnormalities in the urethra such as:

• Narrowing or stricture of the urethra
• Presence of diverticula or outpouchings
• Evidence of urethral trauma or injury
• Signs of congenital urethral anomalies

Clinical Significance

The information obtained from a retrograde urethrogram is invaluable in planning the appropriate management and treatment of urethral conditions. It helps in determining the extent and severity of urethral pathology, guiding surgical interventions, and monitoring the success of treatments for urethral strictures or injuries.

See Also

• Urology
• Urethral stricture
• Urinary tract infection
• Fluoroscopy