Pediatric anesthesia & critical care

Postanesthesia Apnea in Former Preterm Infants for Inguinal Herniorrhaphy: An Update of Risk Factors from an Individual Participant Data Meta-analysis

AnesthesiologyPublished Individual participant data meta-analysis of prospective studies

Authors' conclusion

Anesthetic technique has important implications; neuraxial anesthesia appears to reduce the at-risk PMA for postanesthesia apnea compared with general anesthesia.

Study context

Population
Former preterm infants undergoing open inguinal herniorrhaphy
Participants
751 infants · 12 prospective studies
Comparison
GA vs neuraxial anaesthesia
Outcome
PMA above which postanesthesia apnea risk is less than 1%

Pooled result

As reported in the abstract

PMA cutoff for postanesthesia apnea risk ≈10%, ≈5% and <1%
  • After GA: risk ≈10%, ≈5%, <1% at postmenstrual age (PMA) 53, 57, 65 weeks respectively
  • After neuraxial anesthesia: risk ≈10%, ≈5%, <1% at PMA ≈38, 40, 45 weeks respectively

Further pooled results

OutcomeORP value
Odds of postanesthesia apnea by anesthetic techniqueGeneral anesthesia vs Neuraxial anesthesia6P = 0.008
Odds of postanesthesia apnea by anesthetic techniqueGeneral anesthesia with caudal block vs Neuraxial anesthesia2.94P = 0.012

Incidence of postanesthesia apnea (overall)

Infants with postanesthesia apnea
132 of 751 (17.6%)

Odds of postanesthesia apnea by anesthetic technique

Apnea onset earlier with GA without and with caudal block vs neuraxial anesthesia

Anemia as risk factor

Anemia a risk factor only for infants more than 48 weeks PMA

Original publication

Postanesthesia Apnea in Former Preterm Infants for Inguinal Herniorrhaphy: An Update of Risk Factors from an Individual Participant Data Meta-analysis. Anesthesiology. Published 27 March 2026. doi:10.1097/aln.0000000000005964

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