Where is the clinical ascending lumbar puncture usually performed? Puncture needle by shallow

The puncture point is generally at the line connecting the two posterior upper poles of the iliac, and the needle is inserted in the gap between L3 and L4 or L4 and L5. The puncture needle should pass through the skin, subcutaneous tissue, supraspinous ligament, interspinous ligament between the spinous processes, and yellow The ligaments and epidural space enter the subarachnoid space and are located between the cauda equina nerve roots.

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