Comparison of Two Position for Ultrasound Guided Lumbar Plexus and Sciatic Nerve Block

Comparison of Lateral Decubitus Position Versus Prone Position for Ultrasound Guided Posterior Lumbar Plexus Block and Sciatic Nerve Block

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00988234

Enrollment

200

Registered

2009-10-02

Start date

2009-04-30

Completion date

2010-12-31

Last updated

2011-02-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Lower Limb Surgery

Keywords

Lumbar plexus block, sciatic nerve block, position, ultrasound guidance, elective lower limb surgery

Brief summary

In the present study, the investigators will test the effect of two position on posterior lumbar plexus and subgluteal or sub-greater trochanter sciatic nerve block.

Detailed description

The posterior lumbar plexus block approach was described approximately 30 years ago, using surface anatomical landmarks and a loss-of-resistance technique, but over the years it was almost abandoned for its low successful rate, the huge numbers of adverse effects and its difficulties to be performed. The introduction of the nerve stimulator and ultrasound guided technique in recent years increased the success rate in various peripheral nerve blocks and decreased adverse effects. Ultrasound guided LPB as well as sciatic nerve block technique in a small patient population resulting in a encouraging result, but published clinical data on optimal patient position for ultrasound-guided LPB are limited. We designed this prospective randomized study to compare the success rate, time of performance and complications of ultrasound guided posterior lumbar plexus block as well as subgluteal or sub-greater trochanter sciatic nerve block under lateral decubitus position v.s. prone position.

Interventions

PROCEDURESGPP

ultrasound guided posterior lumbar plexus block and subgluteal sciatic nerve block under prone position

PROCEDURESGTPP

ultrasound guided posterior lumbar plexus block and sub-greater trochanter approach under prone position

PROCEDURESGLP

ultrasound guided posterior lumbar plexus block and subgluteal sciatic nerve block under lateral decubitus position

PROCEDURESGTLP

ultrasound guided posterior lumbar plexus block and sub-greater trochanter approach under lateral decubitus position

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Investigator, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

18 Years to 75 Years

Healthy volunteers

Inclusion criteria

* 18 to 75 years old * elective unilateral lower limb surgery * ASA Physical Status ASA I-III

Exclusion criteria

* age \<18 or \>75 year old * ASA Physical Status \>ASA III * abnormal blood coagulation * infection near puncture place * nerve injury * bilateral lower limb surgery * patients with lumbar vertebral trauma * inability to be properly positioned * chronic narcotic therapy or illicit drug use

Design outcomes

Primary

Measure	Time frame
Block success defined as loss of sensation to pinprick in each of the lumbar plexus and sciatic nerve distributions when measured 30 min after block performance.	30min
Motor blockade was evaluated by assessing the strength of knee extension (femoral nerve), thigh adduction (obturator nerve), and plantar flexion and dorsiflexion of the ankle (sciatic nerve) 30 min after block performance.	30min

Secondary

Measure	Time frame
block execution time, depth of the nerve, needle depth, duration of the sensory and motor blockade, complications such as inadvertent needle puncture of epidural space, dural puncture, peritoneal puncture, and kidney or ureter puncture and nerve injury.	within 48h

Countries

China

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026