This is a process whereby an experienced pain management specialist inserts a needle into the center of an intervertebral disc. Then the specialist injects liquid into the disc to see if by pressurizing the disc this will mimic the pain the patient has. This procedure is often times used after history and physical exam and assorted tests are not clear which disc or if a disc is causing the pain .This often sheds light on this to guide the specialist to treat a specific level of disc.

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