Ketorolac reduces postoperative narcotic requirements

Presented at the 31st Annual Meeting of the American Pediatric Surgical Association, Orlando, Florida, May 25-29, 2000.
https://doi.org/10.1053/jpsu.2001.20011Get rights and content

Abstract

Background/Purpose: Adverse effects from narcotics complicate pain management in children. Ketorolac, a potent nonsteroidal antiinflammatory agent can be used as an adjuvant analgesic, yet concerns of bleeding and nephrotoxicity have limited routine use. The authors hypothesized that postoperative use of ketorolac in healthy pediatric surgical patients would limit narcotic requirements without increasing morbidity. Methods: A case-control clinical trial was conducted of 29 pediatric surgical cases prospectively administered ketorolac (0.5 mg/kg intravenously every 6 hours) supplemented with morphine. Controls receiving morphine only were matched for age (± 6 months) and surgical procedure. Incidence of respiratory depression, urinary retention, emesis, nephrotoxicity, and bleeding were recorded. Results: Patients receiving ketorolac plus morphine had significantly less morphine requirements in the first 48 postoperative hours (Ketorolac plus Morphine: 0.36 ± 0.16 mg/kg/d, Morphine only: 1.08 ± 0.16 mg/kg/d [P <.05, analysis by paired t test]). This decrease was noted despite mode of analgesia (patient controlled or nurse administered). Adverse effects of morphine including respiratory depression, emesis, and urinary retention were not affected by ketorolac. Patients administered ketorolac had no significant increase in bleeding or nephrotoxicity. Conclusion: Ketorolac exhibits significant opiate-sparing effects in the immediate postoperative period without introducing additional morbidity to pediatric surgical procedures. J Pediatr Surg 36:76-79. Copyright © 2001 by W.B. Saunders Company.

Section snippets

Study design

A case-control clinical trial was conducted of 29 pediatric inpatient surgical cases who were treated prospectively with a standard regimen of ketorolac (0.5 mg/kg intravenously every 6 hours) and supplemented with intravenous morphine sulfate (Table 1).

. Surgical Procedures Performed on 29 Matched Pairs Receiving Ketorolac Plus Morphine or Morphine Alone

ProcedureNo.
Appendectomy (acute, nonperforated)6
Appendectomy (acute, perforated)4
Laparoscopic appendectomy1
Nissen fundoplication8
Laparoscopic

Results

Patients receiving ketorolac plus morphine showed a significant reduction in morphine requirements over the first 48 postoperative hours (Fig 1).

. Postoperative daily morphine requirements (milligrams per kilogram per day) in 29 pediatric inpatients surgical cases prospectively treated with a standard regimen of intravenous ketorolac and supplemented with intravenous morphine sulfate. Contemporary controls received morphine only. Pairs were frequency matched for age (± 6 months) and surgical

Discussion

Postoperative analgesia in children should use preventive strategies with fixed-interval dosing of potent analgesics with low toxicity. In the postoperative management of infants and children, this approach often is tempered by concerns of adverse effects related to narcotics.5, 16 Ketorolac is a nonsteroidal antiinflammatory drug with analgesic and antipyretic properties. It has potent antinocioceptive effects on peripheral neurons providing local antiinflammatory activity14 and also may blunt

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