title: Training a Chest Compression of 6-7 cm Depth for High Quality Cardiopulmonary Resuscitation in Hospital Setting: A Randomised Controlled Trial.
abstract: OBJECTIVE
  During cardiopulmonary resuscitation (CPR), chest compression (CC) depth is influenced by the surface on which the patient is placed. We hypothesized that training healthcare providers to perform a CC depth of 6-7 cm (instead of 5-6 cm) on a manikin placed on a mattress during CPR in the hospital might improve their proper CC depth.
  
  
  METHODS
  This prospective randomised controlled study involved 66 premedical students without CPR training. The control group was trained to use a CC depth of 5-6 cm (G 5-6), while the experimental group was taught to use a CC depth of 6-7 cm (G 6-7) with a manikin on the floor. All participants performed CCs for 2 min on a manikin that was placed on a bed 1 hour and then again 4 weeks after the training without a feedback. The parameters of CC quality (depth, rate, % of accurate depth) were assessed and compared between the 2 groups.
  
  
  RESULTS
  Four students were excluded due to loss to follow-up and recording errors, and data of 62 were analysed. CC depth and % of accurate depth were significantly higher among students in the G 6-7 than G 5-6 both 1 hour and 4 weeks after the training (p<0.001), whereas CC rate was not different between two groups (p>0.05).
  
  
  CONCLUSIONS
  Training healthcare providers to perform a CC depth of 6-7 cm could improve quality CC depth when performing CCs on patients who are placed on a mattress during CPR in a hospital setting.
authors: Department of Emergency Medicine, College of Medicine, Hanyang University, Seoul, Korea.
authors: Jaehoon
authors: J
authors: Oh
authors: Department of Emergency Medicine, College of Medicine, Hanyang University, Seoul, Korea. erthim@gmail.com.
authors: Tae Ho
authors: TH
authors: Lim
authors: Department of Emergency Medicine, College of Medicine, Hallym University, Seoul, Korea.
authors: Youngsuk
authors: Y
authors: Cho
authors: Department of Emergency Medicine, College of Medicine, Hanyang University, Seoul, Korea.
authors: Hyunggoo
authors: H
authors: Kang
authors: Department of Emergency Medicine, College of Medicine, Hallym University, Seoul, Korea.
authors: Wonhee
authors: W
authors: Kim
authors: School of Electrical Engineering, University of Ulsan, Ulsan, Korea.
authors: Youngjoon
authors: Y
authors: Chee
authors: School of Electrical Engineering, University of Ulsan, Ulsan, Korea.
authors: Yeongtak
authors: Y
authors: Song
authors: Department of Biomedical Engineering Medicine, College of Medicine, Hanyang University, Seoul, Korea.
authors: In Young
authors: IY
authors: Kim
authors: Department of Emergency Medicine, College of Medicine, Hanyang University, Seoul, Korea.
authors: Juncheol
authors: J
authors: Lee
mesh_terms: D000328:Adult; D001513:Beds; D016887:Cardiopulmonary Resuscitation / Q000193:education* / Q000379:methods*; D005260:Female; D006282:Health Personnel / Q000193:education*; D006761:Hospitals; D006801:Humans; D008297:Male; D008348:Manikins; D011312:Pressure; D011446:Prospective Studies; D013337:Students, Medical; D013909:Thorax / Q000502:physiology*
keywords: Cardiopulmonary resuscitation; advanced cardiac life support; basic life support; bed; chest compression