Related Experiment Video
Updated: Jan 24, 2026

Author Spotlight: Developing Cost-Effective and Durable Ultrasound-Guided 3D-Printed Nerve Block Trainers
Published on: February 9, 2024
Ultrasound-guided lumbar selective nerve root block plus T12 paravertebral and sacral plexus block for hip and knee
Bin Mei1, Yao Lu1, Xuesheng Liu1
1Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University.
Rationale:
For hip or knee arthroplasty, it is essential to develop a satisfied peripheral nerve block method that will benefit elderly patients or patients who are contraindicated to neuraxial anesthesia.
Patients Concerns:
Patient in Case 1 suffered from the right intertrochanteric fracture, combined with chronic obstructive pulmonary disease; Patient in Case 2 suffered from hip osteoarthritis; combined with ankylosing spondylitis; Patient in Case 3 suffered from rheumatoid arthritis, combined with ischemic encephalopathy.
Diagnosis:
Case 1: Right intertrochanteric fracture, chronic obstructive pulmonary disease. Case 2: hip osteoarthritis. Case 3: rheumatoid arthritis.
Interventions:
Ultrasound-guided lumbar selective nerve root block (SNRB) plus T12 paravertebral and sacral plexus block were performed in 2 patients who received hip arthroplasty and 1 patient who received knee arthroplasty.
Outcomes:
All patients successfully received surgeries with this peripheral nerve block method and no postoperative complication was reported.
Lessons:
Ultrasound-guided lumbar SNRB plus T12 paravertebral and sacral plexus block not only satisfied the analgesia requirement of surgery, but also reduced the consumption of local anesthetic.
Related Concept Videos
Block Diagram Reduction
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
Elements of Block Diagrams
A block diagram typically includes essential elements such as comparators, blocks, and feedback loops. Each of these elements...
Spinal Nerves: Plexus II
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...
Spinal Nerves: Plexus I
The Cervical Plexus
The cervical plexus, formed by the anterior rami of the first four...
Relation between Mathematical Equations and Block Diagrams
Local Anesthetics: Clinical Application as Surface, Infiltration, and Conduction Block Anesthesia

