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Aerosol-spread during chest compressions in a cadaver model

By Matthias Ott, Alfio Milazzo, Stefan Liebau, Christina Jaki, Tobias Schilling, Alexander Krohn, Johannes Heymer

Posted 06 Apr 2020
medRxiv DOI: 10.1101/2020.03.31.20049197

ObjectiveTo evaluate aerosol-spread in cardiopulmonary resuscitation (CPR) using different methods of airway management. Knowledge about Aerosol spread is vital during the SARS-CoV-2-Pandemic. MethodsTo evaluate feasibility we nebulized ultraviolet sensitive detergents into the artificial airway of a resuscitation dummy and performed CPR. The spread of the visualized aerosol was documented by a camera. In a second approach we applied nebulized detergents into human cadavers by an endotracheal tube and detected aerosol- spread during chest compressions the same way. We did recordings with undergoing compression- only-CPR, with a surgical mask and with an inserted laryngeal tube with and without a connected airway filter. ResultsMost aerosol-spread at the direction of the provider was visualized during compression-only-CPR. The use of a surgical mask deflected the spread. Inserting a laryngeal tube connected to an airway filter lead to a remarkable reduction of aerosol-spread. ConclusionThe early insertion of a laryngeal tube connected to an airway filter before starting chest compression may be good for two Things: the treatment of hypoxemia as the likeliest cause of cardiac arrest and for staff protection during CPR.

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