Which of the following statements regarding anesthesia for extracorporeal shock wave lithotripsy is accurate?

A. Pain is principally visceral in nature and due to vibrations from the shock waves
B. A T6 epidural level is adequate because renal dermatomes are derived from T6 to L1
C. Air injected into the epidural space can result in neural trauma from the shock waves
D. Intravenous sedation is usually adequate for high energy ESWL