Abstract 81: How Rapidly Can People find an AED?
Success of public defibrillation program (PAD) depends in part on the rapidity for lay people to find an AED. The aim of the present study was to investigate how rapidly lay people can find an AED in international airports, and to uncover the factors that facilitate rapid detection of an AED.
[Methods] In 20 randomly selected locations in each of the airports (8 AEDs / 38000 m2 and 6 AEDs / 14760 m2), 2 people (total of 80) were asked to find an AED as rapidly as possible, and the time (Ta) needed to find an AED and the routes they followed were recorded. The theoretical time (Tt) needed to find an AED was calculated on the diagram assuming that people would reach the nearest AEDs.
[Results] When combined over the 2 airports, Ta was 168 (140 – 450) seconds (median, IQR) and was significantly longer than Tt of 36.4 (17.1–51.8) seconds. Ta was significantly shorter when people reached the nearest AEDs that occurred only on 60% of the trials: 147 (62 – 212) seconds for the nearest AEDs vs 349 (169 – 651) seconds for non-nearest AEDs. Whether or not people had advance knowledge about an AED did not affect Ta: 160 (94 – 387) vs 177 (94 – 387) seconds, respectively with vs without advance knowledge. Tt was similar for 2 airports: 38.8 (17.1 – 44.2) vs 29.8 (14.9 – 63.5) seconds. Despite the considerable inter-airport difference in the configuration of the on-site AED signs (protruding with AED pictogram vs non-protruding without pictogram), Ta was not significantly different between the airports: 163.3 (104.5 – 342.0) vs 194.5 (91.5 – 424.5) seconds. Neither of the airports had off-site signs that showed directions to the nearest AEDs.
[Conclusions] The theoretical prediction of the time based on the diagram of the facilities significantly underestimates the actual time required to find an AED, partly because it ignores the fact that people fail to reach the nearest AED in about 40% of the cases. This suggests that presence of off-site signs showing the direction to the nearest AED is an important factor for rapid detection of an AED. Configurations of the on-site AED signs and the advance knowledge on an AED appeared to be minor factors.