RESUMEN
Opioid use after kidney transplant has been associated with an increased risk of death and graft loss. Several transplant centers have reported reductions in opioid use using multimodal analgesia and education. This study evaluated the impact of an opioid minimization protocol on inpatient opioid use and opioid prescribing on discharge. This was a single-center, retrospective study of adult kidney recipients transplanted from October 2021 to July 2022. Patients on chronic opioids prior to transplant were excluded. The protocol included an intra-operative ultrasound-guided lateral transversus abdominis plane (TAP) block combined with scheduled non-opioid analgesics and tramadol as needed. Acetaminophen 1000 mg and gabapentin 300 mg were given 1 hour prior to the procedure and continued three times daily after transplant. The gabapentin dose was reduced for patients with renal impairment. Additional analgesics including opioids could be added for uncontrolled pain. We hypothesized the protocol would decrease total inpatient morphine milligram equivalents (MMEs) and opioid prescribing on discharge. Fifty-nine post-protocol patients were compared to 52 pre-protocol patients. After the protocol, there was a significant decrease in total inpatient MMEs per day administered and no patient-controlled analgesia (PCA) devices were required. In alignment with the protocol, there was a significant increase in the use of TAP blocks, acetaminophen, gabapentin, and lidocaine patches. While opioid use was lowest in post-protocol patients who received TAP blocks, significant reductions in MMEs per day were still seen in those post-protocol who did not receive TAP blocks. Opioid prescribing at the time of discharge decreased significantly after protocol. No difference was seen in patient-reported pain scores, return to operating room, readmission within 30 days, or length of stay. The use of scheduled acetaminophen and gabapentin with or without a TAP block allowed the elimination of PCA devices and led to significant minimizations in both inpatient opioid use and opioid prescribing on discharge.