title: Performance of chest compressions with the use of a new audio-visual feedback device: a randomized manikin study in health care professionals.
abstract: OBJECTIVE
  Optimal depth (50-60mm) and rate (100-120min(-1)) of chest compressions (CC) is the prerequisite of effective cardiopulmonary resuscitation (CPR). However, insufficient CC during CPR are common even among health care professionals. We sought to evaluate if CC are more effective with the use of a novel feedback device compared to standard CC. Primary endpoints were absolute percentage of correct CC of all CC (correct rate and correct depth, classified as "optimal" CC), and the percentage of CC in target rate and percentage of CC in target depth.
  
  
  METHODS
  63 healthcare professionals performed CC on a manikin with the use of a novel feedback device. The device provides audio-visual information about compression depth and rate. Each participant performed two minutes of CC with and without feedback. Participants were randomized into two groups that performed either CC with feedback first, followed by a trial without feedback, or vice versa. All participants answered a short questionnaire on self-estimation of CC performance.
  
  
  RESULTS
  The absolute percentage of optimal compressions of all compressions has increased from 27.9±28.8% to 47.6±33.5% (p<0.001) with use of the device. Furthermore, a significant increase of the percentage of CC in target depth (35.9±30.6% without vs. 54.8±33.5% with the device, p=0.003) and in target rate (70.5±37.7% without vs. 82.7±27.8 with the device, p=0.039) were observed.
  
  
  CONCLUSIONS
  This novel feedback device significantly improved the quality of CC in health care professionals.
authors.affiliation: Department of Cardiology, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany. Electronic address: alexander.wutzler@charite.de.
authors.forename: Alexander
authors.initials: A
authors.lastname: Wutzler
authors.affiliation: Department of Cardiology, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.
authors.forename: Marwin
authors.initials: M
authors.lastname: Bannehr
authors.affiliation: Department of Cardiology, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.
authors.forename: Sophie
authors.initials: S
authors.lastname: von Ulmenstein
authors.affiliation: Department of Cardiology, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.
authors.forename: Lena
authors.initials: L
authors.lastname: Loehr
authors.affiliation: Department of Epidemiology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Nuthetal, Germany.
authors.forename: Jana
authors.initials: J
authors.lastname: Förster
authors.affiliation: Department of Cardiology, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.
authors.forename: York
authors.initials: Y
authors.lastname: Kühnle
authors.affiliation: Department of Nephrology and Intensive Care Medicine, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.
authors.forename: Andre
authors.initials: A
authors.lastname: Finn
authors.affiliation: Department of Nephrology and Intensive Care Medicine, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Storm
authors.affiliation: Department of Cardiology, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.
authors.forename: Wilhelm
authors.initials: W
authors.lastname: Haverkamp
mesh_terms: D000328:Adult; D001296:Audiovisual Aids; D016887:Cardiopulmonary Resuscitation / Q000193:education*; D002983:Clinical Competence; D004867:Equipment Design; D005260:Female; D006323:Heart Arrest / Q000628:therapy; D006336:Heart Massage / Q000295:instrumentation / Q000379:methods / Q000592:standards; D006801:Humans; D008297:Male; D008348:Manikins; D009726:Nurses / Q000592:standards; D010820:Physicians / Q000592:standards; D058996:Quality Improvement; D000066908:Simulation Training / Q000379:methods
keywords: Chest compression; Feeback device; Medical professionals; Resuscitation