Name two common upper-extremity regional blocks used in anesthesia.

• A. Interscalene block and supraclavicular block.
• B. Epidural and spinal.
• C. Lumbar plexus and femoral.
• D. Sciatic and popliteal.

Answer: (C)

In upper-extremity regional anesthesia, you target the brachial plexus at different anatomical levels. Two of the most frequently used blocks for shoulder and arm surgery are the interscalene block, placed between the scalene muscles to anesthetize the shoulder and upper arm, and the supraclavicular block, given just above the clavicle to block the trunks/divisions of the brachial plexus for anesthesia of the entire upper limb. The other options involve neuraxial techniques or blocks that supply the lower extremities, not the upper limb. So the two common upper-extremity blocks are interscalene and supraclavicular.