Standard Bupivacaine vs Liposomal Bupivacaine in Colorectal Patients

Pain control is a factor that is central to the surgical patient's postoperative experience. Opioid pain medications are a mainstay of postoperative pain management. However, these have several adverse effects. Multimodal pain regimens to minimize opioid use have become central to enhanced recovery after surgery (ERAS) protocols. The transversus abdominis plane (TAP) block is one intervention that contributes to this regimen. Traditionally, TAP blocks are performed with local anesthetics such as bupivacaine. More recently, these have also been performed with liposomal bupivacaine, whose duration of action is much greater than regular bupivacaine (96 hours versus 8-9 hours, respectively). In this study, postoperative opioid usage will be compared between patients receiving regular bupivacaine and liposomal bupivacaine.