Combined spinal-epidural anesthesia, which part of the body is this rigidity?

Refers to spinal anesthesia combined with epidural anesthesia. There are 3 cavities in the spine: epidural space, subdural space, and subarachnoid space (the jade cranial cavity is connected and filled with cerebrospinal fluid)

Spinal anesthesia is also called spinal anesthesia. Local anesthetics are injected into the subarachnoid space to block the anterior and posterior roots of the spinal nerve. The anesthesia method of injecting local anesthetics into the epidural space to block the spinal nerve roots is called epidural space block, referred to as epidural block or epidural anesthesia.

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