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Effect of thoracic stiffness on chest compression performance - A prospective randomized crossover observational
Chia-Lung Kao1, Jui-Yi Tsou2, Ming-Yuan Hong1
1Department of Emergency Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Heliyon
|October 20, 2022
Summary
Thoracic stiffness significantly impacts external chest compression (ECC) performance. Softer springs improve compression depth and quality but reduce recoil, while harder springs increase recoil but compromise depth and can cause fatigue.
Area of Science:
- Cardiology
- Emergency Medicine
- Biomedical Engineering
Background:
- Human thoracic stiffness varies, potentially influencing external chest compression (ECC) effectiveness.
- High-fidelity manikins, like the Resusci® QCPR Anne with Extra Compression Spring, are crucial for simulating varying thoracic stiffness during ECC training.
Purpose of the Study:
- To investigate the biomechanical effects and quality of ECC under different thoracic stiffness conditions.
- To utilize a specialized manikin to simulate and analyze variations in thoracic stiffness during CPR training.
Main Methods:
- Fifty-two participants performed standard ECC on a manikin with adjustable thoracic springs to simulate stiffness variations.
- The MatScan Pressure Measurement system was employed to analyze ECC pressure and force distribution.
Main Results:
- Harder springs improved complete recoil ratio but reduced ECC depth, corrected depth ratio, and overall quality compared to standard and soft springs.
- Softer springs enhanced ECC depth, corrected depth ratio, and overall quality, but showed inferior recoil and increased risk of unbalanced pressure.
- The hard spring group exhibited more symmetrical pressure application, indicated by a smaller radial-ulnar peak pressure difference.
Conclusions:
- Thoracic stiffness is a critical factor influencing ECC performance and quality.
- Findings offer insights for optimizing ECC techniques and training protocols to account for thoracic stiffness variations.
- Balancing compression depth, recoil, and pressure distribution is essential for effective and safe ECC.
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