Yonsei Med J.  2016 Mar;57(2):505-511. 10.3349/ymj.2016.57.2.505.

Training a Chest Compression of 6-7 cm Depth for High Quality Cardiopulmonary Resuscitation in Hospital Setting: A Randomised Controlled Trial

• Oh J
• Lim TH
• Cho Y
• Kang H
• Kim W
• Chee Y
• Song Y
• Kim IY
• Lee J

• KMID: 2374060
• DOI: http://doi.org/10.3349/ymj.2016.57.2.505

Abstract

PURPOSE
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.
MATERIALS AND 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).
CONCLUSION
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.

Keyword

Cardiopulmonary resuscitation; chest compression; basic life support; advanced cardiac life support; bed

MeSH Terms

Adult
Beds
Cardiopulmonary Resuscitation/*education/*methods
Female
Health Personnel/*education
Hospitals
Humans
Male
*Manikins
Pressure
Prospective Studies
*Students, Medical
Thorax/*physiology

Figure

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  Fig. 1 Configuration of experimental setting. BT-CPEA® manikin system could measure a CC depth from 0.0 to 80.0 mm. CC, chest compression.

• 

  Fig. 2 Flow chart of study design. CC, chest compression; G 5–6, group trained to use a CC depth of 5–6 cm; G 6–7, group trained to use a CC depth of 6–7 cm; CPR, cardiopulmonary resuscitation.

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  Fig. 3 Comparison of chest compression quality parameters (manikin placed on bed). A p-value of <0.05 was considered statistically significant. CC, chest compression; CCD, CC depth; CCR, CC rate; G 5–6, group trained to use a CC depth of 5–6 cm; G 6–7, group trained to use a CC depth of 6–7 cm.

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  Fig. 4 Subgroup analysis (stratified by sex) for the comparison of the quality of CC parameters. A p-value of <0.05 was considered statistically significant. F, female; M, male; G 5–6, group trained to use a CC depth of 5–6 cm; G 6–7, group trained to use a CC depth of 6–7 cm; CC, chest compression.

• 

  Fig. 5 Subgroup analysis (stratified by body mass index) for the comparison of the quality of CC parameters. LBW, low body weight; N-LBW, no low body weight; G 5–6, group trained to use a CC depth of 5–6 cm; G 6–7, group trained to use a CC depth of 6–7 cm; CC, chest compression.

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