What is medical subarachnoid anesthesia needle

Subarachnoid anesthesia is lumbar anesthesia, also known as spinal anesthesia, puncture in the lumbar spine 2-3 or 3-4 vertebral space, through the supraspinous ligament, interspinous ligament, yellow ligament into the epidural space, the drug into this space is called epidural anesthesia, further into the puncture will have the feeling of breaking the paper, is to Pierce the arachnoid into the subarachnoid space, Injecting local anesthetics into this space is called subarachnoid anesthesia, which is suitable for lower abdominal surgery, lower limb surgery, and perineal surgery. Such as cesarean section, appendix, hemorrhoids, lower limb fracture.