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Association between advanced airway management with adrenaline injection and prognosis in adult patients with asystole asphyxia out-of-hospital cardiac arrest.

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BACKGROUND The neurological prognosis of asphyxia is poor and the effect of advanced airway management (AAM) in the prehospital setting remains unclear. This study aimed to evaluate the association between… Click to show full abstract

BACKGROUND The neurological prognosis of asphyxia is poor and the effect of advanced airway management (AAM) in the prehospital setting remains unclear. This study aimed to evaluate the association between AAM with adrenaline injection and prognosis in adult patients with asystole asphyxia out-of-hospital cardiac arrest (OHCA). METHODS This study assessed all-Japan Utstein cohort registry data between January 1, 2013 and December 31, 2019. We used propensity score matching analyses before logistic regression analysis to evaluate the effect of AAM on favorable neurological outcome. RESULTS There were 879,057 OHCA cases, including 70,299 cases of asphyxia OHCAs. We extracted the data of 13,642 cases provided with adrenaline injection by emergency medical service. We divided 7,945 asphyxia OHCA cases in asystole into 5,592 and 2,353 with and without AAM, respectively. After 1:1 propensity score matching, 2,338 asphyxia OHCA cases with AAM were matched with 2,338 cases without AAM. Favorable neurological outcome was not significantly different between the AAM and no AAM groups (adjusted odds ratio: 1.1, 95% confidence interval (CI): 0.5-2.5). However, the return of spontaneous circulation (ROSC) (adjusted odds ratio: 1.7, 95% CI: 1.5-1.9) and 1-month survival were improved in the AAM groups (adjusted odds ratio: 1.5, 95% CI: 1.1-1.9). CONCLUSIONS AAM with adrenaline injection for patients with asphyxia OHCA in asystole was associated with improved ROSC and 1-month survival rate but showed no differences in neurologically favorable outcome. Further prospective studies may comprehensively evaluate the effect of AAM for patients with asphyxia.

Keywords: injection; adrenaline injection; airway management; injection prognosis; advanced airway

Journal Title: Journal of epidemiology
Year Published: 2023

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