Cardiac arrest & resuscitation

Drones can be used to provide dispatch centres with on-site photos before arrival of emergency medical services (EMS) in time critical incidents

ResuscitationPublished Retrospective observational study

Authors' conclusion

In a newly implemented drone dispatch service, drones were dispatched to 13% of relevant EMS calls. When drones were dispatched, they arrived at scene earlier than EMS services in 90% of cases. Drones were able to relay photos to the dispatch centre in all cases.

Study context

Population
Emergency calls for suspected out-of-hospital cardiac arrest (OHCA), traffic accidents and fires in buildings; area of ≈200,000 inhabitants, Sweden, December 2022–April 202359 drone deployments
Participants
440 participants
Exposure
Drone vs EMS arrival at time-critical incidents
  • Dronen = 59
Outcome
Feasibility of providing on-site photos in real time and time delay intervals
Methodological details5 AED-drone systems, regional dispatch centre, Sweden
  • 5 AED-drone systems
  • Regional dispatch centre, Sweden

Main finding

As reported in the abstract

Feasibility of drone deployment and photo transmission
GroupValueDeployed: suspected OHCADeployed: traffic accidentsDeployed: fires in buildingsArrived safely at exact locationArrived first on scenePhotos transmitted correctly
Drone13%26/59 (44%)20/59 (34%)13/59 (22%)58/59 cases (98%)47/52 cases (90%)all 59 alerts

Drone

Value13%
Deployed: suspected OHCA26/59 (44%)
Deployed: traffic accidents20/59 (34%)
Deployed: fires in buildings13/59 (22%)
Arrived safely at exact location58/59 cases (98%)
Arrived first on scene47/52 cases (90%)
Photos transmitted correctlyall 59 alerts
Main reasons for non-deployment: closed airspace and unfavourable weather
68%

Observational data: associations, not effects.

Further findings

OutcomeDroneEMSP value
Response timemedian 3:49 (IQR 3:18-4:26) minmedian 05:51 (IQR 04:29-08:04)p-value for time difference between drone and EMS = 0,05
Response time — Largest median time difference in suspected OHCAs
4:10 min, (IQR: 02:57-05:28)
Response time — Time difference when EMS arrived first (5/52 [10%] cases)
5:18 min (IQR 2:19-7:38), p = NA

Safety

No adverse events occurred

Original publication

Drones can be used to provide dispatch centres with on-site photos before arrival of EMS in time critical incidents. Resuscitation. Published 10 July 2024. doi:10.1016/j.resuscitation.2024.110312

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