What is the difference between hard external anesthesia and lumbar puncture

Lumbar puncture is to puncture the subarachnoid space to extract cerebrospinal fluid and measure pressure. The puncture position is at the waist.

Even epidural anesthesia is to inject local anesthetics into the epidural space to achieve the purpose of blocking certain spinal cord segments and nerve roots. The puncture position can be anywhere from the neck to the sacrum.

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