Performance of cardiopulmonary resuscitation during prolonged basic life support in military medical university students: A manikin study

doi:10.5847/wjem.j.1920-8642.2015.03.003

Abstract

Abstract:

BACKGROUND: The quality of chest compressions can be significantly improved after training of rescuers according to the latest national guidelines of China. However, rescuers may be unable to maintain adequate compression or ventilation throughout a response of average emergency medical services because of increased rescuer fatigue. In the present study, we evaluated the performance of cardiopulmonary resuscitation (CPR) in training of military medical university students during a prolonged basic life support (BLS).
METHODS: A 3-hour BLS training was given to 120 military medical university students. Six months after the training, 115 students performed single rescuer BLS on a manikin for 8 minutes. The qualities of chest compressions as well as ventilations were assessed.
RESULTS: The average compression depth and rate were 53.7±5.3 mm and 135.1±15.7 compressions per minute respectively. The proportion of chest compressions with appropriate depth was 71.7%±28.4%. The average ventilation volume was 847.2±260.4 mL and the proportion of students with adequate ventilation was 63.5%. Compared with male students, significantly lower compression depth (46.7±4.8 vs. 54.6±4.8 mm, P<0.001) and adequate compression rate (35.5%±26.5% vs. 76.1%±25.1%, P<0.001) were observed in female students.
CONCLUSIONS: CPR was found to be related to gender, body weight, and body mass index of students in this study. The quality of chest compressions was well maintained in male students during 8 minutes of conventional CPR but declined rapidly in female students after 2 minutes according to the latest national guidelines. Physical fitness and rescuer fatigue did not affect the quality of ventilation.

Key words: Basic life support, Cardiopulmonary resuscitation, Chest compression, Ventilation, Military

Juan Wang, Chao-nan Zhuo, Lei Zhang, Yu-shun Gong, Chang-lin Yin, Yong-qin Li. Performance of cardiopulmonary resuscitation during prolonged basic life support in military medical university students: A manikin study[J]. World Journal of Emergency Medicine, 2015, 6(3): 179-185.

Figures/Tables 4

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Figure 2.

Table 1

Table 2

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Parameters	Male (n=103)	Female (n=12)	P value
Age (years)	23.0±0.9	22.1±1.0	0.009
Height (cm)	173.5±5.4	162.6±4.3	<0.001
Weight (km)	65.8±8.9	52.6±5.5	<0.001
BMI (kg/m²)	21.8±2.3	19.9±2.0	0.008

Parameters	2 minutes	4 minutes	6 minutes	8 minutes
Compression depth (mm)
Male	54.7±4.3	54.7±5.0	54.5±5.4	54.2±6.1
Female	49.1±5.3^#	46.1±5.3^Δ	45.9±5.4^Δ	45.7±5.4^Δ
Compression rate (CPM)
Male	135.3±15.9	135.7±15.1	136.6±16.1	138.4±16.4
Female	121.5±16.5^*	119.8±16.4^#	125.9±16.1^*	126.2±19.0
Adequate compression (%)
Male	79.4±25.9	78.1±27.6	75.1±28.1	71.7±30.2
Female	47.4±35.9^*	32.8±29.8^*	32.5±26.8^Δ	29.5±27.7^Δ
Ventilation volume (mL)
Male	740.7±377.4	781.8±335.2	814.2±354.2	827.6±386.7
Female	640.8±468.1	645.0±389.8	692.5±396.6	791.7±335.7
Adequate ventilation (%)
Male	35.4±29.5	32.9±33.6	30.1±31.0	29.6±33.8
Female	25.8±26.1	27.4±25.5	37.3±37.7	21.0±31.5
Ventilation too much (%)
Male	50.9±37.5	53.7±41.5	57.9±39.8	63.6±1.5
Female	58.0±37.2	49.8±41.4	57.0±40.8	54.0±43.5

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