Outcomes of Robot-Assisted Laparoscopic Nephrectomy with ITM and Multimodal Analgesia

Overview

This retrospective cohort study evaluated the impact of an acute pain service (APS)-driven multimodal analgesia protocol including intrathecal morphine (ITM) on postoperative opioid consumption in patients undergoing robot-assisted partial and radical nephrectomy. The study found that implementation of the APS protocol with ITM was associated with decreased 24-hour postoperative opioid use compared to historic controls managed by the surgical team without ITM.

Background

Robot-assisted partial and radical nephrectomy are common surgical approaches for renal tumors but present challenges in acute postoperative pain management due to incisional, visceral, and referred pain. Visceral pain predominates in the first 24 hours postoperatively and is difficult to control with local anesthetics alone. Intrathecal morphine provides significant analgesia for approximately 24 hours at low doses but carries a risk of respiratory depression, especially when combined with systemic opioids. Limited data exist on the use of ITM in robot-assisted nephrectomy patients, prompting this study to assess its effect within a multimodal analgesia protocol managed by an acute pain service.

Data Highlights

Key Findings

• Implementation of an APS-driven multimodal analgesia protocol including preoperative ITM significantly decreased median 24-hour postoperative opioid consumption in robotic nephrectomy patients.
• Secondary outcomes showed reduced opioid use during 24–48 and 48–72 hour postoperative periods in the APS group compared to historic controls.
• Patients managed by APS received scheduled acetaminophen and ketorolac postoperatively, whereas prior to APS involvement, these were inconsistently prescribed.
• Preoperative screening excluded patients with contraindications to ITM such as anticoagulation, coagulopathy, morphine allergy, or refusal.
• Propensity score matching balanced cohorts for BMI, age, preoperative opioid use, sex, and ASA score to reduce confounding.
• Segmented regression analysis modeled trends in opioid consumption before and after APS implementation, supporting the observed reductions.

Clinical Implications

Incorporating an acute pain service-driven multimodal analgesia protocol with preoperative intrathecal morphine can effectively reduce postoperative opioid requirements in patients undergoing robot-assisted nephrectomy. Careful patient selection and monitoring are essential to mitigate risks such as respiratory depression. Scheduled non-opioid analgesics like acetaminophen and ketorolac should be consistently utilized to optimize pain control and potentially shorten hospital stay.

Conclusion

The study supports that multimodal analgesia including intrathecal morphine managed by an acute pain service reduces postoperative opioid consumption in robot-assisted nephrectomy patients, highlighting the benefit of structured pain management protocols in this surgical population.

References

1. References 1-6 as cited in source article