What is a herniogram and how is it used in diagnosis?

A herniogram is a diagnostic imaging procedure used to visualize a hernia. It involves injecting a contrast material into the hernia sac, typically through a needle or catheter, and then taking X-ray images or performing a fluoroscopy to observe the flow of the contrast material. This test helps in identifying the location, size, and characteristics of the hernia, aiding in the diagnosis and treatment planning.