Needle Tip Position and Bevel Direction Have No Effect in the Fluoroscopic Epidural Spreading Pattern in Caudal Epidural Injections: A Randomized Trial

Figure 3

Logistic regression analysis of the epidural spread at (a) L2-3, (b) L3-4, (c) L4-5, and (d) L5-S1 disc levels after injection of 14 mL of injectates.

(a)

(b)

(c)

(d)