JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

Quality of closed chest compression on a manikin in ambulance vehicles and flying helicopters with a real time automated feedback

Christof Havel, Wolfgang Schreiber, Helmut Trimmel, Reinhard Malzer, Moritz Haugk, Nina Richling, Eva Riedmüller, Fritz Sterz, Harald Herkner
Resuscitation 2010, 81 (1): 59-64
19926386

CONTEXT: Automated verbal and visual feedback improves quality of resuscitation in out-of-hospital cardiac arrest and was proven to increase short-term survival. Quality of resuscitation may be hampered in more difficult situations like emergency transportation. Currently there is no evidence if feedback devices can improve resuscitation quality during different modes of transportation.

OBJECTIVE: To assess the effect of real time automated feedback on the quality of resuscitation in an emergency transportation setting.

DESIGN: Randomised cross-over trial.

SETTING: Medical University of Vienna, Vienna Municipal Ambulance Service and Helicopter Emergency Medical Service Unit (Christophorus Flugrettungsverein) in September 2007.

PARTICIPANTS: European Resuscitation Council (ERC) certified health care professionals performing CPR in a flying helicopter and in a moving ambulance vehicle on a manikin with human-like chest properties.

INTERVENTIONS: CPR sessions, with real time automated feedback as the intervention and standard CPR without feedback as control.

MAIN OUTCOME MEASURES: Quality of chest compression during resuscitation.

RESULTS: Feedback resulted in less deviation from ideal compression rate 100 min(-1) (9+/-9 min(-1), p<0.0001) with this effect becoming steadily larger over time. Applied work was less in the feedback group compared to controls (373+/-448 cm x compression; p<0.001). Feedback did not influence ideal compression depth significantly. There was some indication of a learning effect of the feedback device.

CONCLUSIONS: Real time automated feedback improves certain aspects of CPR quality in flying helicopters and moving ambulance vehicles. The effect of feedback guidance was most pronounced for chest compression rate.

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