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JOURNAL ARTICLE

The impact of airway strategy on the patient outcome after out-of-hospital cardiac arrest: A propensity score matched analysis

Patrick Sulzgruber, Philip Datler, Fritz Sterz, Michael Poppe, Elisabeth Lobmeyr, Markus Keferböck, Sebastian Zeiner, Alexander Nürnberger, Andreas Schober, Pia Hubner, Peter Stratil, Christian Wallmueller, Christoph Weiser, Alexandra-Maria Warenits, Andreas Zajicek, Florian Ettl, Ingrid Magnet, Thomas Uray, Christoph Testori, Raphael van Tulder
European Heart Journal. Acute Cardiovascular Care 2017 September 1, : 2048872617731894
28948850

BACKGROUND: While guidelines mentioned supraglottic airway management in the case of out-of- hospital cardiac arrest, robust data of their impact on the patient outcome remain scare and results are inconclusive.

METHODS: To assess the impact of the airway strategy on the patient outcome we prospectively enrolled 2224 individuals suffering cardiac arrest who were treated by the Viennese municipal emergency medical service. To control for potential confounders, propensity score matching was performed. Patients were matched in four groups with a 1:1:1:1 ratio ( n=210/group) according to bag-mask-valve, laryngeal tube, endotracheal intubation and secondary endotracheal intubation after primary laryngeal tube ventilation.

RESULTS: The laryngeal tube subgroup showed the lowest 30-day survival rate among all tested devices ( p<0.001). However, in the case of endotracheal intubation after primary laryngeal tube ventilation, survival rates were comparable to the primary endotracheal tube subgroup. The use of a laryngeal tube was independently and directly associated with mortality with an adjusted odds ratio of 1.97 (confidence interval: 1.14-3.39; p=0.015). Additionally, patients receiving laryngeal tube ventilation showed the lowest rate of good neurological performance (6.7%; p<0.001) among subgroups. However, if patients received endotracheal intubation after initial laryngeal tube ventilation, the outcome proved to be significantly better (9.5%; p<0.001).

CONCLUSION: We found that the use of a laryngeal tube for airway management in cardiac arrest was significantly associated with poor 30-day survival rates and unfavourable neurological outcome. A primary endotracheal airway management needs to be considered at the scene, or an earliest possible secondary endotracheal intubation during both pre-hospital and in-hospital post-return of spontaneous circulation critical care seems crucial and most beneficial for the patient outcome.

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