Hyungsoo Lim;Dong Ah Shin;Jaehoon Sim;Jaeheung Park;Taegyun Kim;Kyung Su Kim;Gil Joon Suh;Jung Chan Lee
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Results: 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\n<inline-formula> <tex-math>$\\cdot $ </tex-math></inline-formula>\n s/mm to 0.511 N\n<inline-formula> <tex-math>$\\cdot $ </tex-math></inline-formula>\n 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. Conclusion: The system is capable of emulating the mechanical properties and behavior of the human chests, thereby enhancing the CPR training experience.","PeriodicalId":54255,"journal":{"name":"IEEE Journal of Translational Engineering in Health and Medicine-Jtehm","volume":"12 ","pages":"542-549"},"PeriodicalIF":3.7000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10599511","citationCount":"0","resultStr":"{\"title\":\"Variable Stiffness and Damping Mechanism for CPR Manikin to Simulate Mechanical Properties of Human Chest\",\"authors\":\"Hyungsoo Lim;Dong Ah Shin;Jaehoon Sim;Jaeheung Park;Taegyun Kim;Kyung Su Kim;Gil Joon Suh;Jung Chan Lee\",\"doi\":\"10.1109/JTEHM.2024.3429422\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Objective: 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. Methods: 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. Results: 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\\n<inline-formula> <tex-math>$\\\\cdot $ </tex-math></inline-formula>\\n s/mm to 0.511 N\\n<inline-formula> <tex-math>$\\\\cdot $ </tex-math></inline-formula>\\n 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. 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引用次数: 0
摘要
目的:本研究介绍了一种新型系统,该系统可模拟人体胸部的各种机械特性,通过反映患者胸部的真实情况来增强心肺复苏训练的体验。方法:拟议的系统由可变刚度机构(VSM)和可变阻尼器(VD)组成,分别利用拉伸硅胶带和带可控阀门的仪表盘阻尼器来调节刚度和阻尼。使用机器人机械手对系统施加循环加载。对压缩力和位移进行测量和分析,以评估系统的机械响应。同时还验证了系统的长期稳定性。结果该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,非线性力-位移曲线具有滞后性,与在患者胸部观察到的曲线相似。通过控制 VSM 和 VD,可以有意改变曲线的斜率和面积,这分别与刚度和阻尼有关。系统的刚度和阻尼是根据性能测试结果计算得出的。刚度范围为 5.34 N/mm 至 13.59 N/mm,阻尼范围为 0.127 N $\cdot $ s/mm 至 0.511 N $\cdot $ s/mm。这些特性涵盖了所报道的人体胸部机械特性的很大一部分。即使在长期压缩试验的最大刚度条件下,该系统也表现出令人满意的稳定性。结论该系统能够模拟人体胸腔的机械特性和行为,从而增强心肺复苏训练体验。
Variable Stiffness and Damping Mechanism for CPR Manikin to Simulate Mechanical Properties of Human Chest
Objective: 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. Methods: 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. Results: 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
$\cdot $
s/mm to 0.511 N
$\cdot $
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. Conclusion: The system is capable of emulating the mechanical properties and behavior of the human chests, thereby enhancing the CPR training experience.
期刊介绍:
The IEEE Journal of Translational Engineering in Health and Medicine is an open access product that bridges the engineering and clinical worlds, focusing on detailed descriptions of advanced technical solutions to a clinical need along with clinical results and healthcare relevance. The journal provides a platform for state-of-the-art technology directions in the interdisciplinary field of biomedical engineering, embracing engineering, life sciences and medicine. A unique aspect of the journal is its ability to foster a collaboration between physicians and engineers for presenting broad and compelling real world technological and engineering solutions that can be implemented in the interest of improving quality of patient care and treatment outcomes, thereby reducing costs and improving efficiency. The journal provides an active forum for clinical research and relevant state-of the-art technology for members of all the IEEE societies that have an interest in biomedical engineering as well as reaching out directly to physicians and the medical community through the American Medical Association (AMA) and other clinical societies. The scope of the journal includes, but is not limited, to topics on: Medical devices, healthcare delivery systems, global healthcare initiatives, and ICT based services; Technological relevance to healthcare cost reduction; Technology affecting healthcare management, decision-making, and policy; Advanced technical work that is applied to solving specific clinical needs.