The peak end-tidal carbon dioxide concentration recorded during cardiopulmonary resuscitation as an indicator of survival: a nationwide cohort study of pediatric out-of-hospital cardiac arrests

ResuscitationPublished Nationwide population-based cohort study

Study context

Population
Patients under 18 years with trauma-related or medical out-of-hospital cardiac arrest (OHCA), French RéAC OHCA registry, 2011 to 2023
Participants
1,209 pediatric OHCAs
Exposure
Trauma-related OHCA vs Medical OHCA
  • Trauma-related OHCAn = 226
  • Medical OHCAn = 983
Outcome
ROSC and d30 survival
Methodological detailsregistry-based (French RéAC OHCA registry), prognostic accuracy (AUROC, Youden index)
  • Registry-based (French RéAC OHCA registry)
  • Prognostic accuracy (AUROC, Youden index)

Main finding

As reported in the abstract

Discrimination of highest ETCO2 for ROSC and d30 survival
GroupAUROC for return of spontaneous circulation (ROSC) [95% CI]AUROC for d30 survival [95% CI]Optimal cut-off for ROSCOptimal cut-off for d30 survival
Trauma-related OHCA0.808 [0.745-0.872]0.854 [0.761-0.947]21 mmHg29 mmHg
Medical OHCA0.803 [0.774-0.831]0.732 [0.676-0.787]27 mmHg26 mmHg

AUROC for return of spontaneous circulation (ROSC) [95% CI]

Trauma-related OHCA0.808 [0.745-0.872]
Medical OHCA0.803 [0.774-0.831]

AUROC for d30 survival [95% CI]

Trauma-related OHCA0.854 [0.761-0.947]
Medical OHCA0.732 [0.676-0.787]

Optimal cut-off for ROSC

Trauma-related OHCA21 mmHg
Medical OHCA27 mmHg

Optimal cut-off for d30 survival

Trauma-related OHCA29 mmHg
Medical OHCA26 mmHg

Observational data: associations, not effects.

Further findings

ROSC and d30 survival, all pediatric OHCAs

ROSC achieved
347 (29%)
d30 survival
61 (5%)

Peak recorded ETCO2 by outcome

In both trauma-related and medical OHCAs, peak ETCO2 higher in patients with ROSC and in d30 survivors

Original publication

The peak end-tidal carbon dioxide concentration recorded during cardiopulmonary resuscitation as an indicator of survival: a nationwide cohort study of pediatric out-of-hospital cardiac arrests. Resuscitation. Published 29 April 2025. doi:10.1016/j.resuscitation.2025.110626

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