What Is The Difference Between A Lumbar Puncture And An Epidural?

Lumbar puncture is actually the traditional name for subarachnoid puncture.

First of all, subarachnoid puncture mainly refers to a kind of invasive examination operation, which is clinically used to extract cerebrospinal fluid for related examination. However, subarachnoid puncture can also be used to inject local anesthesia drugs for anesthesia (also known as "subarachnoid block" or "lumbar anesthesia").

Maybe a lot of people don't understand, subarachnoid block and epidural anesthesia are not on the back of the drug? What's the difference between the two?