title: Effect of Using an Audiovisual CPR Feedback Device on Chest Compression Rate and Depth.
abstract: BACKGROUND
  The aim of the study is to investigate the effect of using Automated External Defibrillator (AED) audiovisual feedback on the quality of cardiopulmonary resuscitation (CPR) in a manikin training setting.
  
  
  METHODS
  Five cycles of 30 chest compressions were performed on a manikin without CPR prompts. After an interval of at least 5 minutes, the participants performed another 5 cycles with the use of real time audiovisual feedback via the ZOLL E-Series defibrillator. Performance data were obtained and analysed.
  
  
  RESULTS
  A total of 209 dialysis centre staff participated in the study. Using a feedback system resulted in a statistically significant improvement from 39.57% to 46.94% (P=0.009) of the participants being within the target compression depth of 4 cm to 5 cm and a reduction in those below target from 16.45% to 11.05% (P=0.004). The use of feedback also produced a significant improvement in achieving the target for rate of chest compression (90 to 110 compressions per minute) from 41.27% to 53.49%; (P<0.001). The mean depth of chest compressions was 4.85 cm (SD=0.79) without audiovisual feedback and 4.91 (SD=0.69) with feedback. For rate of chest compressions, it was 104.89 (SD=13.74) vs 101.65 (SD=10.21) respectively. The mean depth of chest compression was less in males than in females (4.61 cm vs 4.93 cm, P=0.011), and this trend was reversed with the use of feedback.
  
  
  CONCLUSIONS
  In conclusion, the use of feedback devices helps to improve the quality of CPR during training. However more studies involving cardiac arrest patients requiring CPR need to be done to determine if these devices improve survival.
authors.affiliation: Department of Emergency Medicine, Singapore General Hospital, Singapore.
authors.forename: Jeremy C P
authors.initials: JC
authors.lastname: Wee
authors.forename: Mooppil
authors.initials: M
authors.lastname: Nandakumar
authors.forename: Yiong Huak
authors.initials: YH
authors.lastname: Chan
authors.forename: Rowena S L
authors.initials: RS
authors.lastname: Yeo
authors.forename: Kaldip
authors.initials: K
authors.lastname: Kaur
authors.forename: V
authors.initials: V
authors.lastname: Anantharaman
authors.forename: Susan
authors.initials: S
authors.lastname: Yap
authors.forename: Marcus E H
authors.initials: ME
authors.lastname: Ong
mesh_terms: D000328:Adult; D001296:Audiovisual Aids; D016887:Cardiopulmonary Resuscitation / Q000295:instrumentation* / Q000379:methods; D047548:Defibrillators; D005246:Feedback; D005260:Female; D006801:Humans; D008297:Male; D008348:Manikins; D008875:Middle Aged; D011312:Pressure; D011446:Prospective Studies; D013909:Thorax; D055815:Young Adult