What levels of lumbar and epidural anesthesia go through from the skin to the anesthetic site?

Skin, supraspinal ligament, interspinous ligament, ligamentum flavum, epidural space, dural space, subdural space. Arachnoid. Subarachnoid space. Infusion of fluid before anesthesia, if blood pressure drops after anesthesia, quick infusion of 200-300ml, if blood pressure does not rise. Ephedrine or other vasoactive drugs may be given to boost the pressure. Postoperative pain, if not perforated, is rare and does not require special prevention. If the perforation, then should go to the pillow flat, not a large amount of caffeine, if not epidural injection of autologous blood.

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