A research assistant ask patients to rate their pain using a 0-10 numerical rating scale: 1) prior to delivery of the first dose of LA, 2) immediately following surgery (just before the second anesthetic infusion for experimental group patients), and 3) immediately before discharge from the hospital (after the second anesthetic infusion for experimental group patients). On the day after surgery, the research assistant will contact patients in both groups and will ask them to rate their pain over the 24-hour post-operative period. Pain reporting at these four time points will provide us with a comprehensive assessment of patient comfort after their regional nerve block and whether the second infusion of LA was effective at alleviating post-operative pain.