Interdisciplinary Program in BioengineeringSeoul National University Graduate School Seoul 08826 South Korea.
Integrated Major in Innovative Medical ScienceSeoul National University Graduate School Seoul 08826 South Korea.
IEEE J Transl Eng Health Med. 2024 Jul 16;12:542-549. doi: 10.1109/JTEHM.2024.3429422. eCollection 2024.
This study introduces a novel system that can simulate diverse mechanical properties of the human chest to enhance the experience of CPR training by reflecting realistic chest conditions of patients.
The proposed system consists of Variable stiffness mechanisms (VSMs) and Variable damper (VD) utilizing stretching silicone bands and dashpot dampers with controllable valves to modulate stiffness and damping, respectively. Cyclic loading was applied with a robot manipulator to the system. Compression force and displacement were measured and analyzed to evaluate the system's mechanical response. Long-term stability of the system was also validated.
A non-linear response of the human chest under compression is realized through this design. Test results indicated non-linear force-displacement curves with hysteresis, similar to those observed in the chest of patients. Controlling the VSM and VD allowed for intentional changes in the slope and area of curves that are related to stiffness and damping, respectively. Stiffness and damping of the system were computed using performance test results. The stiffness ranged from 5.34 N/mm to 13.59 N/mm and the damping ranges from 0.127 N[Formula: see text] s/mm to 0.511 N[Formula: see text] s/mm. These properties cover a significant portion of the reported mechanical properties of the human chests. The system demonstrated satisfactory stability even when it was subjected to maximum stiffness conditions of the long-term compression test.
The system is capable of emulating the mechanical properties and behavior of the human chests, thereby enhancing the CPR training experience.
本研究引入了一种新型系统，该系统可以模拟人体胸部的多种机械特性，通过反映患者真实的胸部状况来增强 CPR 培训的体验。
所提出的系统由利用拉伸硅橡胶带和带有可控阀的粘性阻尼器的可变刚度机构（VSM）和可变阻尼器（VD）组成，分别用于调节刚度和阻尼。机器人操纵器对系统施加循环载荷。测量和分析压缩力和位移，以评估系统的机械响应。还验证了系统的长期稳定性。
通过这种设计实现了人体胸部在压缩下的非线性响应。测试结果表明，存在具有滞后的非线性力-位移曲线，类似于在患者胸部观察到的情况。控制 VSM 和 VD 可以故意改变与刚度和阻尼分别相关的曲线斜率和面积。使用性能测试结果计算系统的刚度和阻尼。系统的刚度范围为 5.34 N/mm 至 13.59 N/mm，阻尼范围为 0.127 N[Formula: see text] s/mm 至 0.511 N[Formula: see text] s/mm。这些特性涵盖了人体胸部报告的机械特性的很大一部分。即使在长期压缩测试的最大刚度条件下，该系统也表现出令人满意的稳定性。
该系统能够模拟人体胸部的机械特性和行为，从而增强 CPR 培训的体验。
