Discography(Discogram)

[DEFINITION]

• A radiographic technique used to evaluate the motion segments of the spine by placing radiopaque contrast material into the nucleus of an intervertebral disc.

• The procedure is performed to confirm morphology, or changes, in the normal structure of the vertebra, facets, and discs. The most common finding in a person with symptomatic back pain is annular tear and disc herniation. Although an MRI may show disc herniation and/or a tearing of the tough outer "annulus" of the disc, this procedure is considered to be the "gold standard" confirmatory exam.

• The procedure is typically performed under a light sedation. It is important for the patient to communicate with the doctor during the exam. Via a small skin opening, a surgical needle is passed down through the back at the disc level being investigated. The needle will pass through the annulus into the nucleus wherein the contrast material is injected.

• Radiographic pictures are taken as the contrast is injected and spreads throughout the nucleus. Any changes in the normal anatomy of the disc are evaluated. If it is suspected that more than one disc is symptomatic, the surgeon may evaluate a level above or below as well.