Risk of intervertebral disc joint puncture during lumbar puncture

Area of Science:

• Anatomy
• Medical Procedures
• Radiology

Background:

• Lumbar puncture (LP) is a common diagnostic and therapeutic procedure.
• Inadvertent penetration of the intervertebral disc joint during LP may go unnoticed.
• Disc penetration can lead to long-term consequences such as accelerated disc degeneration.

Purpose of the Study:

• To demonstrate and evaluate the risk of intervertebral disc puncture during standard lumbar puncture procedures.
• To quantify the probability of disc penetration at different lumbar levels (L3-4, L4-5, L5-S1).

Main Methods:

• Study involved 50 human cadavers.
• Lumbar puncture was simulated using a midline approach at L3-4, L4-5, and L5-S1 levels.
• Needle placement was visualized using lateral X-ray to determine if the needle entered the disc space or posterior vertebral body wall.

Main Results:

• The overall probability of disc penetration was 25%.
• Specific probabilities of disc puncture were 20% at L3-4, 38% at L4-5, and 16% at L5-S1.
• A statistically significant increased risk of disc puncture was observed at the L4-5 level compared to L5-S1 (p=0.023).

Conclusions:

• Standard lumbar puncture carries a significant risk of intervertebral disc penetration.
• This complication often goes unrecognized during the procedure.
• Disc penetration is a potential cause of accelerated intervertebral joint degeneration.