Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1016/j.bjane.2025.844588
Brazilian Journal of Anesthesiology
Original Investigation

End-tidal carbon dioxide-guided extracorporeal cardiopulmonary resuscitation improves neurological prognosis in patients: a single-center retrospective cohort study

A ressuscitação cardiopulmonar extracorpórea guiada por dióxido de carbono ao final da expiração melhora o prognóstico neurológico em pacientes: um estudo de coorte retrospectivo de centro único

Xiaozu Liao, Chen Gu, Zhou Cheng, Kepeng Liu, Qing Yin, Binfei Li

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Abstract

Background

Extracorporeal Cardiopulmonary Resuscitation (ECPR) is an effective intervention for restoring adequate circulatory perfusion after cardiac arrest. Ensuring high-quality Cardiopulmonary Resuscitation (CPR) before initiating Extracorporeal Membrane Oxygenation (ECMO) is critical to mitigate tissue hypoxia and ischemia. This study aimed to evaluate the effect of End-Tidal Carbon Dioxide (ETCO2) Goal-Directed CPR (GDCPR) on neurological function before ECMO using a retrospective case-control analysis.

Methods

The medical records of all patients who received ECPR treated at Zhongshan City People's Hospital were collected between January 2020 and March 2023. In this retrospective cohort study, the patients were divided into Conventional CPR (CCPR) and ETCO2-GDCPR groups based on whether ETCO2 was used as a guide for CPR.

Results

A total of 71 patients were included, of whom 46 comprised the CCPR group and 25 comprised the GDCPR group. Approximately 37% of patients who received ECPR had good cerebral function at discharge, with a higher rate in the GDCPR group (52%) compared with the CCPR group (28%) (p = 0.047). Multivariate analysis showed that the Highest Interleukin-6 (H-IL6) levels after ECMO (Odds Ratio [OR = 1.001], 95% Confidence Interval [95% CI 1.000–1.003], p = 0.005) was a risk factor for neurological function at discharge. The other risk factors for poor prognosis in patients who received ECPR included pre-ECMO CPR protocols (OR = 10.74, 95% CI 1.90–60.48, p = 0.007) and IL6 levels after ECMO (OR = 1.002, 95% CI 1.001–1.003, p = 0.005). ECMO duration (OR = 0.83, 95% CI 0.74–0.94, p = 0.002) was identified as a protective factor. Patients with short ECMO duration have a poor prognosis. The area under the curve for ECMO duration was 0.86 (0.77–0.94, p < 0.01), while that for H-IL6 was 0.19 (0.09–0.29, p < 0.01).

Conclusion

ETCO2-guided ECPR is associated with improved neurological prognosis and patient outcomes. Therefore, monitoring ETCO2 levels should be considered a crucial component of evaluating resuscitation efficacy during CPR.

Keywords

Cardiopulmonary resuscitationExtracorporeal membrane oxygenationPrognosisRisk factors  

Resumo

Introdução

A Ressuscitação Cardiopulmonar Extracorpórea (ECPR) é uma intervenção eficaz para restaurar a perfusão circulatória adequada após uma parada cardíaca. Garantir a qualidade da Ressuscitação Cardiopulmonar (CPR) antes da implementação da Oxigenação por Membrana Extracorpórea (ECMO) é essencial para mitigar a hipóxia e isquemia tecidual. Este estudo teve como objetivo avaliar o efeito da CPR guiada por metas de dióxido de carbono ao final da expiração (ETCO-GDCPR) na função neurológica antes da ECMO, utilizando uma análise retrospectiva caso-controle.

Métodos

Foram coletados os prontuários de todos os pacientes que receberam ECPR no Hospital Popular da Cidade de Zhongshan entre janeiro de 2020 e março de 2023. Neste estudo de coorte retrospectivo, os pacientes foram divididos em dois grupos — CPR Convencional (CCPR) e CPR guiada por ETCO (GDCPR) — com base no uso do ETCO como parâmetro de orientação da CPR.

Resultados

Um total de 71 pacientes foi incluído, sendo 46 no grupo CCPR e 25 no grupo GDCPR. Aproximadamente 37% dos pacientes que receberam ECPR apresentaram boa função cerebral na alta hospitalar, com uma taxa mais elevada no grupo GDCPR (52%) em comparação ao grupo CCPR (28%) (p = 0,047). A análise multivariada demonstrou que os níveis mais altos de Interleucina-6 após ECMO (H-IL6) (Razão de Chances [OR = 1,001], Intervalo de Confiança de 95% [IC 95% 1,000–1,003], p = 0,005) foram um fator de risco para a função neurológica na alta. Outros fatores de risco para pior prognóstico em pacientes que receberam ECPR incluíram os protocolos de CPR antes da ECMO (OR = 10,74, IC 95% 1,90–60,48, p = 0,007) e os níveis de IL6 após ECMO (OR = 1,002, IC 95% 1,001–1,003, p = 0,005). A duração da ECMO (OR = 0,83, IC 95% 0,74–0,94, p = 0,002) foi identificada como fator protetor. Pacientes com menor tempo de ECMO apresentaram pior prognóstico. A área sob a curva para a duração da ECMO foi 0,86 (0,77–0,94, p < 0,01), enquanto a de H-IL6 foi 0,19 (0,09–0,29, p < 0,01).

Conclusão

A ECPR guiada por ETCO está associada à melhora no prognóstico neurológico e nos desfechos clínicos. Portanto, o monitoramento dos níveis de ETCO deve ser considerado um componente essencial na avaliação da eficácia da CPR.

Palavras-chave

Ressuscitação cardiopulmonar; Oxigenação por membrana extracorpórea; Prognóstico; Fatores de risco

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Submitted date:
07/17/2024

Accepted date:
12/24/2024

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