Spinal anesthesia is injected directly into which space?

Spinal anesthesia is injected directly into which space?

• A. CSF
• B. Epidural Space
• C. Muscle Tissue
• D. Subcutaneous Tissue

Answer: (A)

Spinal anesthesia is delivered directly into the subarachnoid space, the CSF-filled area surrounding the spinal cord. Injecting into this space lets the local anesthetic mix with cerebrospinal fluid and quickly block nerve roots at and below the level of injection, producing a rapid, dense sensory and motor blockade. If the drug were injected into the epidural space, muscle, or subcutaneous tissue, it would not reach the CSF-caused neural targets in the same way, so the anesthesia would be slower, less complete, or ineffective.

Spinal anesthesia is delivered directly into the subarachnoid space, the CSF-filled area surrounding the spinal cord. Injecting into this space lets the local anesthetic mix with cerebrospinal fluid and quickly block nerve roots at and below the level of injection, producing a rapid, dense sensory and motor blockade. If the drug were injected into the epidural space, muscle, or subcutaneous tissue, it would not reach the CSF-caused neural targets in the same way, so the anesthesia would be slower, less complete, or ineffective.