Ultrasound-guided parasacral approach to the sciatic nerve block in children.

Background: The parasacral (PS) approach to sciatic nerve blockade has the potential for safe and effective use in children, but has never been studied in this population. Its potential advantages include increased posterior cutaneous nerve block reliability, potential for hip joint analgesia, and decreased nerve depth, making ultrasound guidance easier.

Objective: To assess the efficacy of an ultrasound-guided PS sciatic nerve block in children.