Pain Control in Colorectal Surgery: Liposomal Bupivacaine Block Versus Intravenous Lidociane

"2\. Liposomal bupivacaine TAP block (experimental arm)~1. Block will be administered after induction of anesthesia and before incision by a specifically trained attending surgeon or surgical fellow with the colorectal service.~2. A single vial of liposomal bupivacaine (20 mL 1.3%, 13.3mg/mL, 266 mg) will be diluted in 50cc bupivacaine to a volume of 60cc prior to administration. This will be divided into 2 doses for bilateral TAP blocks.~3. The LB will be administered under ultrasound guidance in the transversus abdominis plain per manufacturer recommendations.~4. Adhesive tapes will be applied at the level of the TAP block puncture sites."

"1\. Intravenous Lidocaine infusion (control arm, current standard of care)~1. 100 mg/5mL intravenous bolus of lidocaine 2% PF 5mL will be initiated by anesthesia service prior to general anesthesia induction.~2. 1.5 mg/kg/hr to begin prior to incision and continue until discontinued 1 hr postoperatively in PACU. Patients will be monitored in PACU for at least 30 minutes after discontinuation of lidocaine drip.~3. Adhesive tapes will be applied at the presumed level of TAP block puncture sites."