Anaes Vivas · Applied anatomy
Data viva — neuraxial needle-path anatomy
A Primary anatomy data viva — read a sagittal lumbar-spine needle-path diagram; name the layers from skin to subarachnoid space; identify the ligamentum-flavum loss-of-resistance (epidural endpoint) and the free-CSF (spinal endpoint); use Tuffier's line and cord termination at L1/L2 to justify a safe interspace.
On this page
Study tools
Target exams
ANZCAFRCAABAEDAIC
Prompt
A Primary anatomy data viva — read a sagittal lumbar-spine needle-path diagram; name the layers from skin to subarachnoid space; identify the ligamentum-flavum loss-of-resistance (epidural endpoint) and the free-CSF (spinal endpoint); use Tuffier's line and cord termination at L1/L2 to justify a safe interspace.
Stimulus
A labelled sagittal diagram of the lumbar spine shows a midline needle entering between two spinous processes and advancing anteriorly, with each layer marked from posterior to anterior. Name the layers in order, identify the epidural and subarachnoid endpoints, and explain how the surface landmarks keep the needle below the cord.
References3ShowHide
- [1]Alsaati I, et al. MRI-based lumbar epidural-space depth. Tomography, 2026.PMID 42042941
- [3]Alessi L, et al. Anesthetic Management in a Patient With Tethered Spinal Cord Syndrome Undergoing Knee Replacement Surgery. Case Rep Anesthesiol, 2026.PMID 42339046
- [4]Goksu H, et al. Evaluation of loss of resistance technique using an air-filled injector to enhance accuracy of landmark-guided knee joint injections. Turk J Phys Med Rehabil, 2026.PMID 42291381