Anatomy

The caudal epidural space is the lowest section of the epidural space and is entered through the sacral hiatus, which is still accessible in children as the lamina of S5 (and/or S4) have not yet fused.

The dural sac finishes at L2-L3 (T10-L3) in term infants (L4 in preterm infants) and L1 in children >1y old (= adult level).