What method does a double-contrast cystogram involve?

The correct method for a double-contrast cystogram involves injecting soluble positive-contrast media along with air into the bladder. This approach enhances the imaging of the bladder's internal structure and allows for better visualization of potential abnormalities.

When the soluble positive-contrast media is introduced into the bladder, it provides a clear outline of the bladder wall, which is essential for detecting lesions or irregularities. The subsequent introduction of air creates a contrast effect by distending the bladder, which separates the bladder wall from the contrast media. This separation improves the delineation of the bladder surfaces and enhances the overall contrast seen on the imaging results, making it easier to identify conditions such as tumors, diverticula, or intravesical stones.

This method is so effective that it is commonly used in clinical practice for diagnosing various bladder pathologies, thereby emphasizing the importance of both components—liquid contrast for filling the bladder and air for enhancing visibility. The combination ensures that the imaging captures maximum detail, making it a preferred technique in urological assessments.