text: PREOPERATIVE DIAGNOSIS: , Low back pain.,POSTOPERATIVE DIAGNOSIS: , Low back pain.,PROCEDURE PERFORMED:,1.  Lumbar discogram L2-3.,2.  Lumbar discogram L3-4.,3.  Lumbar discogram L4-5.,4.  Lumbar discogram L5-S1.,ANESTHESIA:  ,IV sedation.,PROCEDURE IN DETAIL:  ,The patient was brought to the Radiology Suite and placed prone onto a radiolucent table.  The C-arm was brought into the operative field and AP, left right oblique and lateral fluoroscopic images of the L1-2 through L5-S1 levels were obtained.  We then proceeded to prepare the low back with a Betadine solution and draped sterile.  Using an oblique approach to the spine, the L5-S1 level was addressed using an oblique projection angled C-arm in order to allow for perpendicular penetration of the disc space.  A metallic marker was then placed laterally and a needle entrance point was determined.  A skin wheal was raised with 1% Xylocaine and an #18-gauge needle was advanced up to the level of the disc space using AP, oblique and lateral fluoroscopic projections.  A second needle, #22-gauge 6-inch needle was then introduced into the disc space and with AP and lateral fluoroscopic projections, was placed into the center of the nucleus.  We then proceeded to perform a similar placement of needles at the L4-5, L3-4 and L2-3 levels.,A solution of Isovue 300 with 1 gm of Ancef was then drawn into a 10 cc syringe and without informing the patient of our injecting, we then proceeded to inject the disc spaces sequentially.radiology, back pain, c-arm, fluoroscopic projections, disc space, lumbar discogram, fluoroscopic, needle,