The epidural needle is inserted into the epidural space for providing epidural anesthesia. The local anesthetic medication is injected outside of the sac containing spinal fluid and spinal cord. The nerves are blocked in the epidural space
The spinal needle is inserted into the spinal space for providing spinal anesthesia. The needle pierces the sac containing spinal fluid and spinal cord. The local anesthetic is injected into the spinal fluid. The nerves are blocked in the spinal space. The spinal needle is introduced into the spinal space below the level of the spinal cord so that the spinal cord is not injured.