Where is the epidural needle anesthesia?

Epidural anesthesia refers to epidural anesthesia, which is divided into posterior median puncture and paramedian puncture. It is generally penetrated from the space of 2~3 lumbar spinous processes, as well as sacral hiatus. After passing through the ligamentum flavum, there will be an obvious sense of breakthrough, and the negative pressure in the needle tube will disappear. The so-called puncture means that it has passed through the dura mater, entered the subdural space, and even entered the subarachnoid space through the arachnoid, causing the cerebrospinal fluid to flow out.

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