The lumbar puncture needle goes through the 5 layers of structure from shallow to deep

Lumbar puncture generally chooses the lumbar 3-4 space. The structures that pass through in sequence are: skin, subcutaneous tissue, supraspinous ligament, interspinous ligament, and ligamentum flavum. After passing through the ligamentum flavum, it reaches the epidural space. The main purpose of epidural anesthesia can be achieved; then the needle is advanced to penetrate the dura and arachnoid to reach the subarachnoid space, that is, to reach the destination of lumbar puncture.

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