Fluoroscopically Guided Cervical Interlaminar Epidural Injections Using the Midline Approach: An Analysis of Epidurography Contrast Patterns

BACKGROUND: The purpose of this study was to evaluate epidurography contrast patterns in fluoroscopically guided cervical interlaminar epidural injections using the midline approach. METHODS: All epidural injections were performed at the C6-7 level in the prone position. Epidurography was performed using a fixed amount of iotrolan 240 mg I/mL (1, 2, 3 mL). RESULTS: The rate of ventral. epidural spread was 56.7% in Group A (1 mL), 90% in Group B (2 mL), and 93.3% in Group C (3 mL). CONCLUSIONS: Two milliliters of contrast solution can provide optimal dispersion of contrast in a ventral and longitudinal spread.