What is even hard anesthesia

Even hard external is to puncture the ligamentum flavum with a puncture needle to reach the epidural space, and inject local anesthetics into the epidural space to block the nerve roots. In theory, it can be hit from the cervical spine to the sacral spine, but it is rarely seen now Someone hit the cervical spine. Spinal-epidural union is a combination of spinal anesthesia (that is, subarachnoid anesthesia) and epidural anesthesia.

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