Background: Local anesthetic (LA) may be delivered by a single injection or by continuous infusion through an indwelling catheter. A downside of the single-shot technique is that the LA has a limited duration of action, meaning that, after discharge, patients sometimes have to contend with post-surgical pain that limits their activities and reduces their quality of life. Occasionally, a supplementary dose of analgesic, such as morphine or a LA, will be administered, either intravenously or via single injection. We speculate that, rather than using a single injection, post-operative pain management may be better controlled by installing a perineural catheter pre- or intra-operatively, which would allow a flexible schedule of LA delivery post-operatively and enable clinicians to tailor an analgesia regimen to the patient's needs. Our aim is to compare the effectiveness of a double-shot anesthetic infusion - one to block the nerve and another to provide postoperative analgesia - to the conventional single-shot method in controlling pain following a regional nerve block.