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Ultrasound‐guided Pararadicular Injection in the Lumbar Spine: A Comparative Study of the Paramedian Sagittal and Paramedian Sagittal Oblique Approaches

Ultrasound‐guided nerve root blocks and transforaminal injections are well established, and several procedural feasibility studies have been reported. However, the contrast dispersion pattern during ultrasound‐guided pararadicular injection has not been reported. We hypothesized that the paramedian sagittal oblique approach provides a superior intraforaminal contrast‐spread pattern compared to the paramedian sagittal approach during ultrasound‐guided pararadicular injections in the lumbar spine.