Paediatric anaesthesia & critical care

Intrathecal Hydromorphone Dosing for Adolescent Spinal Fusion: A Prospective Dose‐Escalation Study

Paediatr AnaesthPublished single-center, prospective, blinded dose-escalation study

Authors' conclusion

Increasing ITH dose was not associated with improved analgesia or change in supplemental opioid or diazepam use. Doses > 5 mcg kg-1 were associated with adverse respiratory effects. These findings support conservative dosing strategies and underscore the need to define the minimum effective dose in pediatric populations.

Study context

Population
Patients aged 10–17 years undergoing posterior spinal fusion (PSF)completed the study
Participants
Twenty-seven patients
Exposure
Relationship between intrathecal hydromorphone (ITH) dose, analgesia, and adverse effects
  • ITHn = Twenty-seven
Outcome
Maximum postoperative pain
Follow-up
Within 18 h
Methodological detailsbiased-coin up-down sequential allocation design
  • Biased-coin up-down sequential allocation design

Main finding

As reported in the abstract

Spearman correlation between ITH dose and maximum pain, r

0.16

p

0.41

Observational data: associations, not effects.

Secondary outcomes

OutcomeHR (per unit of ITH dose (unit not stated)) (95% CI)P value
Time to rescue opioidNot significantly associated1.24 (0.68–2.25)P = 0.485
Time to diazepamNot significantly associated1.10 (0.72–1.71)P = 0.655

Pain burden (area under the curve)

Spearman correlation between ITH dose and pain burden, r
0.32
p
0.10
  • No significant association

24-h systemic opioid consumption (OME, excluding ITH)

Spearman correlation between ITH dose and 24-h OME, r
0.13
p
0.52
  • No significant association

ITH dose received

Median ITH dose, mcg kg-1 (IQR, 3.5-7.0)
5.5
Median absolute dose, mcg (IQR, 180-400)
370

Safety

Adverse respiratory events

Occurred at doses > 5 mcg kg-1 without improved analgesia

Original publication

Intrathecal Hydromorphone Dosing for Adolescent Spinal Fusion: A Prospective Dose‐Escalation Study. Paediatr Anaesth. Published 7 October 2026. doi:10.1002/pan.70325

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