• Am J Emerg Med · Sep 2023

    Randomized Controlled Trial

    Dispatcher-assisted BLS for lay bystanders: A pilot study comparing video streaming via smart glasses and telephone instructions.

    • Silvia Aranda-García, Jaime Barrio-Cortes, Felipe Fernández-Méndez, Martín Otero-Agra, Marc Darné, Ernesto Herrera-Pedroviejo, Roberto Barcala-Furelos, and Antonio Rodríguez-Núñez.
    • GRAFAIS Research Group, Institut Nacional d'Educació Física de Catalunya (INEFC), Universitat de Barcelona (UB), Barcelona, Spain; CLINURSID Research Group, School of Nursing, University of Santiago de Compostela, Santiago de Compostela, Spain; Faculty of Health, University Camilo José Cela, Madrid, Spain.
    • Am J Emerg Med. 2023 Sep 1; 71: 163168163-168.

    ObjectiveTo determine whether dispatcher assistance via smart glasses improves bystander basic life support (BLS) performance compared with standard telephone assistance in a simulated out-of-hospital cardiac arrest (OHCA) scenario.MethodsPilot study in which 28 lay people randomly assigned to a smart glasses-video assistance (SG-VA) intervention group or a smartphone-audio assistance (SP-AA) control group received dispatcher guidance from a dispatcher to provide BLS in an OHCA simulation. SG-VA rescuers received assistance via a video call with smart glasses (Vuzix, Blade) connected to a wireless network, while SP-AA rescuers received instructions over a smartphone with the speaker function activated. BLS protocol steps, quality of chest compressions, and performance times were compared.ResultsNine of the 14 SG-VA rescuers correctly completed the BLS protocol compared with none of the SP-AA rescuers (p = 0.01). A significantly higher number of SG-VA rescuers successfully opened the airway (13 vs. 5, p = 0.002), checked breathing (13 vs. 8, p = 0.03), correctly positioned the automatic external defibrillator pads (14 vs.6, p = 0.001), and warned bystanders to stay clear before delivering the shock (12 vs. 0, p < 0.001). No significant differences were observed for performance times or chest compression quality. The mean compression rate was 104 compressions per minute in the SG-VA group and 98 compressions per minute in the SP-AA group (p = 0.46); mean depth of compression was 4.5 cm and 4.4 cm (p = 0.49), respectively.ConclusionsSmart glasses could significantly improve dispatcher-assisted bystander performance in an OHCA event. Their potential in real-life situations should be evaluated.Copyright © 2023. Published by Elsevier Inc.

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