Pediatric anesthesia & critical care

Regional anesthesia and functional outcomes after anterior cruciate ligament reconstruction surgery in adolescent patients: Society of Pediatric Anesthesia Improvement Network (SPAIN)

Reg Anesth Pain MedPublished Prospective observational registry study

Authors' conclusion

Regional anesthesia did not impair functional outcomes after adolescent anterior cruciate ligament reconstruction.

Study context

Population
Patients aged 12–17 years undergoing anterior cruciate ligament reconstructionenrolled
Participants
519 patients
Exposure
Anterior and posterior nerve blocks vs anterior block alone vs no block
Outcome
Functional recovery: Lysholm Knee Score (0-100; higher = better function) and Limb Symmetry Index (≥90% = readiness to return to sport)
Follow-up
POD 1, day 3, week 6, month 6 (Lysholm); 6-9 months (Limb Symmetry Index)
Methodological detailsmulticentre, 15 institutions
  • Multicentre
  • 15 institutions

Main finding

As reported in the abstract

Lysholm Score · week 6

Anterior and posterior blocks

83

median

No block or anterior block alone

78

median

P = 0.041

Observational data: associations, not effects.

Further findings

Median

Outcome12-15 yearsOlder adolescentsORP value
Suboptimal Limb Symmetry Index (<90%) by younger age2.54P = 0.03
Lysholm Score by age (subgroup)8986P < 0.05

Limb Symmetry Index ≥90% · 6-9 months

Achieved Limb Symmetry Index ≥90%
67%

Other predictors of function

Females reported lower scores than males at several time points
High early postoperative pain (NRS ≥7) predicted lower function through week 6
Positive temperament and lower preoperative anxiety/depression scores predicted better outcomes

Original publication

Regional anesthesia and functional outcomes after anterior cruciate ligament reconstruction surgery in adolescent patients: Society of Pediatric Anesthesia Improvement Network (SPAIN). Reg Anesth Pain Med. Published 29 October 2025. doi:10.1136/rapm-2025-107017

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