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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
  1. Je Hyeok Oh1,
  2. Chan Woong Kim2,
  3. Sung Eun Kim2,
  4. Sang Jin Lee2,
  5. Dong Hoon Lee2
  1. 1Department of Emergency Medicine, National Police Hospital, Seoul, Republic of Korea
  2. 2Department of Emergency Medicine, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
  1. Correspondence to Professor Sung Eun Kim, Department of Emergency Medicine, Chung-Ang University, College of Medicine, 84 Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea156-755; emkse{at}


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.

Materials and 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.

  • cardiac arrest
  • resuscitation

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