Abstract 19549: Automated External Defibrillation: Not That Easy! Untrained Laypeople Place AED Pads Poorly
Introduction: Public access defibrillation is recommended to increase survival. Automated external defibrillators (AED) have therefore been widely deployed and are available in public places. AEDs are claimed to be easy to use without requirements for training. The aim of this study was to investigate the ability of untrained laypersons to correctly place AED pads.
Methods: Untrained laypeople were invited to participate. Participants were asked to operate a training AED (Lifepak® CR-T AED Trainer, PhysioControl) and place pads according to instructions fra the AED. Pads were placed on an anatomically realistic male resuscitation torso with arms (AMBU® Man, AMBU). Positioning of pads was digitally photographed and compared to the recommended pad position i.e. left apical pad in the left mid-axillary line, approximately level with the V6 ECG electrode and right sternal pad to the right of the sternum, below the clavicle. Digital data analysis was performed using ImageJ (version 1.46r) and distance from the center of the AED pads to the recommended pad position was calculated.
Results: In total 40 volunteers (female: 60%, mean age 48.6 years) participated. The distance from the recommended left apical pad position was (median; 25% and 75% percentile) 8.6 (6.5; 10.4) cm while distance from the recommended right sternal pad position was (median; 25% and 75% percentile) 2.4 (1.6; 3.7) cm. In total, 95% of participants placed the left apical pad more than 5 cm from the recommended position. The right sternal pad was less often (12.5%, p<0.0001) placed more than 5 cm away from recommended position. The left apical electrode was often placed too medial (Figure 1). Only, 12.5% of participants moved the left arm of the manikin to help place the left apical pad correctly.
Conclusions: Untrained laypeople place AED pads poorly. The left apical pad is often misplaced medially. AED voice prompts and pad design should be further developed to guide untrained users to correct pad placement.
Author Disclosures: H. Bødtker: None. M. Stærk: None. K.G. Lauridsen: None. A. Jæger: None. B. Løfgren: None.
- © 2015 by American Heart Association, Inc.