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KMID : 0895520140180030007
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Journal of the Korean Society of Emergency Medical Technology
2014 Volume.18 No. 3 p.7 ~ p.18
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Analysis of trunk angle and muscle activation during chest compression in 119 EMTs
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Shin Dong-Min
Lee Chang-Sub
Kim Seung-Yong
Kim Chang-Kook
Hong Eun-Jeong
Lee Young-Chul
Choi Ga-Ram
Kim Gyoung-Yong
Jang Mun-Sun
Kim Jeong-Hee
Han Boong-Ki
Lee Jong-Kun
Tak Yang-Ju
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Abstract
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Purpose: We aimed to investigate trunk angle and muscle activation of the extremity and back to evaluate the effect of chest compression on work-related musculoskeletal disorders in 119 emergency medical technicians (EMTs).
Methods: Eighteen 119 EMTs performed 2-minute chest compression without interruption on a cardiopulmonary resuscitation manikin, during which we measured changes in the trunk and shoulder joint angles, muscle activation (triceps brachii, biceps brachii, erector spinae, gluteus maximus, pectoralis major, rectus abdominis, and rectus femoris) and chest compression accuracy.
Results: The decrease in trunk angle by trunk muscle activation was the highest in event 2, the major direction of chest compression. Both shoulder joint angles had no significant difference. Muscle activation of the triceps brachii (p < .01), biceps brachii (p < .05), rectus abdominis (p < .05) and rectus femoris (p < .01) significantly increased during the compression phase compared with the decompression phase, with the rectus femoris showing an increase of 19%. Muscle activation of the erector spinae significantly increased in the decompression phase compared with the compression phase (p < .01).
Conclusion: 119 EMTs mainly use the triceps brachii, biceps brachii and pectoralis major muscles during chest compression.
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KEYWORD
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Chest compression, Emergency medical technician, Work-related musculoskeletal disorders
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