Informed consent obtained.
Patient positioned prone.
Sterile prep and drape.
1% lignocaine local anaesthetic.
Under fluoroscopic guidance via posterior approach a 22G spinal needle was inserted into the L3/4 intervertebral space (second image: collimated image demonstrating spinal needle inserted into the intervertebral space; third image: Lateral image confirming needle in the spinal canal).
CSF samples obtained.
Needle removed and a dressing applied.
No peri procedural complications observed.