Nerve guidance with versus without prepuncture ultrasound visualization for psoas compartment block and perineural catheter insertion: A randomized, prospective, blinded study

Nerve-Stimulation technique combined with Pre-puncture Ultrasound Visualization for continuous lumbar plexus blocks is comparable to Nerve-Stimulation technique in terms of percentage of block success, intraoperative opioid consumption and postoperative pain relief. Pre-puncture Ultrasound Visualization may reduce the time required for readiness to surgery.