Low-Dose Perineural Dexamethasone Enhances Pediatric Postoperative Analgesia: Study

A new study published in the Journal of Pediatric Orthopedics showed that low-dose perineural dexamethasone (0.05–0.1 mg/kg) effectively prolongs postoperative analgesia and reduces opioid requirements in children undergoing upper limb surgery, without causing systemic side effects. The 0.05 mg/kg dose may provide the best balance between pain relief and faster motor recovery.

The study focused on the supraclavicular brachial plexus block, which is usually involved in the hand and wrist surgeries. While dexamethasone has already proven useful in prolonging analgesia in adults, its optimal dosing and safety profile in pediatric patients have remained unclear.

Thus, this triple-blinded, randomized controlled trial was carried forward which involved 90 children between the ages of 3 months and 6 years. All participants were scheduled for elective upper extremity surgery and received a nerve block using 0.2% ropivacaine. They were then divided into a control group receiving saline, and two intervention groups receiving dexamethasone at doses of 0.05 mg/kg or 0.1 mg/kg.

This research measured how long it took for children to require their first dose of rescue opioid medication after arriving in recovery as the primary goal. The children in the higher-dose dexamethasone group experienced pain relief for an average of 19.4 hours, while those in the lower-dose group averaged 16 hours. Also, the control group required opioids after just 8.5 hours.

Beyond delaying the need for opioids, both dexamethasone groups also consumed significantly less opioid medication overall. Pain scores, assessed using the FLACC scale, were consistently lower in these groups, majorly during the critical first 12 hours after surgery.

Also, this research evaluated potential systemic effects by monitoring blood glucose levels and inflammatory markers such as neutrophil-to-lymphocyte and platelet-to-lymphocyte ratios. No strong differences were observed among the three groups, which suggests that low-dose perineural dexamethasone does not trigger metabolic or inflammatory stress.

While children receiving dexamethasone did experience a slight delay in motor recovery, this did not interfere with early mobilization or postoperative care. The lower dose of 0.05 mg/kg appeared to offer the best balance which offers substantial pain relief while minimizing delays in motor function. Overall, the findings of this study suggest that incorporating low-dose dexamethasone into pediatric nerve blocks could improve comfort and reduce reliance on opioids without compromising safety. 

Source:

Reysner, T., Ciftci, B., Bialka, S., Gola, W., Czarecki, P., Pietraszek, P., Kowalski, G., Daroszewski, P., & Reysner, M. (2026). Low-dose perineural dexamethasone enhances analgesia after pediatric hand surgery without elevating systemic stress markers: A randomized controlled trial. Journal of Pediatric Orthopedics. https://doi.org/10.1097/BPO.0000000000003287