Where is spinal anesthesia typically administered?

Spinal anesthesia is typically administered in the lumbar region of the spine, specifically between the L4 and L5 vertebrae. This location is selected to avoid injury to the spinal cord, which ends at the level of L1 to L2 in adults. By administering the anesthesia below this level, practitioners ensure that the procedure is safe and effective while providing adequate analgesia for surgeries involving the lower abdomen, pelvis, and lower extremities.

The choice of this specific intervertebral space allows for optimal access to the cerebrospinal fluid, which is important for the administration of the anesthetic agent. This method provides the desired block for pain relief while minimizing the risks associated with the procedure.