NCT 00213954.

Trial name or title	Ultrasound guidance in nerve block anaesthesia
Methods	Randomized, parallel design
Participants	Patients aged over 18 years, scheduled for one of these blocks: interscalene, humeral, parasacral or lumbar blocks, for trauma or orthopaedic surgeries
Interventions	US + PNS versus PNS
Outcomes	Sensory and motor block quality Complications
Starting date	May 2005
Contact information	Principal Investigator: Laurence Le Gourrier, MD., Unité d'Anesthésiologie et de Réanimation Chirurgicale, Hôpital de Hautepierre, Strasborg, France
Notes	Completion date: February 2009