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In a landmark study, Winnie AP, Ramamurthy S, Durrani [5] described the anatomy of the lumbar plexus. They found that the lumbar plexus is sandwiched between the psoas major muscle and the ilacus muscles.
Merman, "Quadratus lumborum block as an alternative to lumbar plexus block for hip surgery: a report of 2 cases," A&A Case Reports, vol.
No dose-finding studies have been conducted for the SSPS technique, but the minimal effective anesthetic volume of 0.5% ropivacaine to accomplish a successful Shamrock lumbar plexus blockade in 95% of patients (ED95) is 36.0 mL (95% CI 19.7 to 52.2) [36].
Opioid-free analgesia following total knee arthroplasty--a multimodal approach using continuous lumbar plexus (psoas compartment) block, acetaminophen, and ketorolac.
Posterior lumbar plexus block, anatomy, approach and techniques, Reg Anaesth Pain Med 2005; 30: 143-9.
Marino et al (23) divided 225 patients undergoing total hip arthroplasty into three groups: continuous FNB, lumbar plexus nerve block and systemic opioid.
The femoral nerve is the largest branch of the lumbar plexus. It is formed within the psoas major muscle, descends posterolaterally through the pelvis lateral to the femoral artery and vein, and then branches into terminal nerves that supply musculoskeletal structures that allow for thigh flexion, abduction, and lateral rotation from the hip joint.
Regional anaesthesia is usually divided into either central (epidural, spinal and caudal anaesthesia), or peripheral nerve blocks (lumbar plexus, brachial, intercostal nerve).
(24,25) The presence of a CDP indicates conduction of sensory nerve action potentials through the brachial or lumbar plexus to the spinal cord.
Brachial plexitis and myelitis and herpes-zoster lumbar plexus disorder in patient treated with infliximab.
It must be ensured that psoas was parted between the middle and anterior third of the muscle, guaranteeing that lumbar plexus was posteriorly located and outside operative corridor.