title: Comparison of chest compressions in the standing position beside a bed at knee level and the kneeling position: a non-randomised, single-blind, cross-over trial.
abstract: BACKGROUND
  When rescuers perform cardiopulmonary resuscitation (CPR) from a standing position, the height at which chest compressions are carried out is raised.
  
  
  OBJECTIVE
  To determine whether chest compressions delivered on a bed adjusted to rescuer's knee height are as effective as those delivered on the floor.
  
  
  METHODS
  A total of 20 fourth-year medical students participated in the study. The students performed chest compressions for 2 min each on a manikin lying on the floor (test 1) and on a manikin lying on a bed (test 2). The average compression rate (ACR) and the average compression depth (ACD) were compared between the two tests.
  
  
  RESULTS
  The ACR was not significantly different between tests 1 and 2 (120.1 to 132.9  vs 115.7 to 131.2 numbers/min, 95% CI, p=0.324). The ACD was also not significantly different between tests 1 and 2 (51.2 to 56.6 vs 49.4 to 55.7 mm, 95% CI, p=0.058).
  
  
  CONCLUSIONS
  The results suggest that there may be no significant differences in compression rate and depth between CPR performed on manikins placed on the floor and those placed at a rescuer's knee height.
authors.affiliation: Department of Emergency Medicine, National Police Hospital, Seoul, Republic of Korea.
authors.forename: Je Hyeok
authors.initials: JH
authors.lastname: Oh
authors.affiliation: Department of Emergency Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea.
authors.forename: Chan Woong
authors.initials: CW
authors.lastname: Kim
authors.affiliation: Department of Emergency Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea.
authors.forename: Sung Eun
authors.initials: SE
authors.lastname: Kim
authors.affiliation: Department of Emergency Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea.
authors.forename: Sang Jin
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Department of Emergency Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea.
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Lee
mesh_terms: D000328:Adult; D001513:Beds; D016887:Cardiopulmonary Resuscitation / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008348:Manikins; D011187:Posture
keywords: cardiac arrest; resuscitation