Shamrock Versus Lumbar Ultrasound Trident - Ultrasound Guided Block of the Lumbar Plexus
Status:
Completed
Trial end date:
2015-03-01
Target enrollment:
Participant gender:
Summary
The main objective of the trial is to complete a double-blinded randomized controlled trial
of a lumbar plexus block with the Shamrock technique versus the Lumbar Ultrasound Trident
technique by estimating the time of performance of lumbar plexus blocks in healthy
volunteers.
Secondary objectives include a) estimates of number and depth of needle injections, distance
of injection site from the midline, minimal electric nerve stimulation to trigger muscular
response and the type of response, and volunteer discomfort during block injection, b)
measurements of plasma lidocaine and mean arterial blood pressure, c) examinations of sensory
block of the dermatomes T8-S3 and motor block of the femoral nerve, the obturator nerve, the
hip abductor muscles, and the hamstring muscles, d) success rate of lumbar plexus block, e)
perineural and epidural distribution of local anesthetics added contrast visualized on
magnetic resonance imaging (MRI) scanning, and f) cost-effectiveness for the Shamrock
technique versus the Lumbar Ultrasound Trident Technique for lumbar plexus block in healthy
volunteers.
The hypothesis is that the Shamrock technique is faster to perform than the Lumbar Ultrasound
technique, and that the success rate of the Shamrock technique is equal to or higher than the
Lumbar Ultrasound Trident technique.