Safety Enhancement by Optimizing Frequency of Implantable Cardiac Pacemaker Wireless Charging System

Xiao, Chunyan; Hao, Sihui; Cheng, Dingning; Liao, Chunmao

doi:10.1109/tbcas.2022.3170575

Cited by 15 publications

(5 citation statements)

References 33 publications

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“…The performance of the WPT system using the internally integrated dual-coupled structure proposed in this study is compared with the performance of WPT systems using different structures in previous cardiac pacemaker research, as shown in Table 6. The results demonstrate that, compared to non-integrated structures as found in references, 12,17 the proposed internally integrated dual-coupled structure in this study can achieve similar transmission efficiency with smaller coil dimensions. In comparison to the conventional integrated structure used in Chen Weihua et al, 28 the proposed internally integrated dual-coupled structure can achieve higher system transmission efficiency while maintaining similar coil dimensions.…”

Section: Analysis Of Experimental Resultssupporting

confidence: 56%

“…The results indicated that the system achieves a higher safe transmission distance when operating at lower frequencies. Furthermore, Xiao C and others, 17 utilizing anatomical models with charging systems and pacemaker boxes, comprehensively assessed human safety factors, including SAR, electric field, efficiency, temperature rise, and electromagnetic interference (EMI), across the frequency range of 100 kHz to 1 MHz. Their findings determined that the optimal safe frequency for cardiac pacemakers falls within the range of 200 to 300 kHz.…”

Section: Introductionmentioning

confidence: 99%

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Research on dual‐coupled wireless power transfer system for cardiac pacemaker based on integrated coils

Chen,

Ge,

Yan

et al. 2023

Circuit Theory & Apps

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SummaryIn order to reduce the implantation volume and improve the transmission efficiency of the magnetically coupled resonant wireless power transfer system for cardiac pacemakers, a dual‐coupled wireless power transfer system for cardiac pacemakers that integrates a compensation coil into the main coil was designed. First, the mutual inductance equivalent model of the dual‐coupled wireless power transfer system was established and the impedance matching parameters were solved. The double‐sided inductor–capacitor–inductor (DS‐LCL) circuit simulation model considering the equivalent series resistance was established with MATLAB. The influence of different inductance ratios on the output power and transfer efficiency of the system was analyzed in the range of 200–300 kHz, and the system parameters for optimal transfer efficiency were determined. Second, the compensation coil on the same side was naturally decoupled by changing the aspect ratio of the compensation coil. The magnetic field distribution between the internally integrated dual‐coupled structure proposed in this paper and the conventional integrated structure was compared using COMSOL, and the safety assessment of the system was conducted, considering parameters such as temperature rise and specific absorption rate. Finally, an experimental platform was established to verify the system's output performance and safety. The results showed that compared with conventional integrated structures, the proposed integrated structure increased the output power by 0.229 W and transmission efficiency by 10.08% at a transmission distance of 8 mm. The maximum temperature rise is 1.9°C.

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Section: Analysis Of Experimental Resultssupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Research on dual‐coupled wireless power transfer system for cardiac pacemaker based on integrated coils

Chen,

Ge,

Yan

et al. 2023

Circuit Theory & Apps

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“…Tissue absorption and electric field distribution vary according to quality, impacting SAR. Because the human body is so complex, various methods exist to build and make in vitro models [169].…”

Section: )mentioning

confidence: 99%

Survey of near-field wireless communication and power transfer for biomedical implants

Abduljaleel,

Mutashar,

Gharghan

2024

ETJ

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 Review of wireless power transfer techniques and their classifications in biomedical applications.  Comparison of WPT methods for biomedical devices based on performance metrics.  Introduction to major near-field wireless power transfer topologies and related mathematical models.  Comparison of data transmission schemes in WPT-based modulation techniques.  Investigation of the main applications of biomedical devices, then discussion of the challenges and solutions.Bio-implanted medical devices with electronic components play a crucial role due to their effectiveness in monitoring and diagnosing diseases, enhancing patient comfort, and ensuring safety. Recently, significant efforts have been conducted to develop implantable and wireless telemetric biomedical systems. Topics such as appropriate near-field wireless communication design, power use, monitoring devices, high power transfer efficiency from external to internal parts (implanted), high communication rates, and the need for low energy consumption all significantly influence the advancement of implantable systems. In this survey, a comprehensive examination is undertaken on diverse subjects associated with near-field wireless power transfer (WPT)-based biomedical applications. The scope of this study encompasses various aspects, including WPT types, a comparative analysis of WPT types and techniques for medical devices, data transmission methods employing WPT-based modulation approaches, and the integration of WPT into biomedical implantable systems. Furthermore, the study investigates the extraction of research concerning WPT topologies and corresponding mathematical models, such as power transfer, transfer efficiency, mutual inductance, quality factor, and coupling coefficient, sourced from existing literature. The article also delves into the impact of the specific absorption rate on patient tissue. It sheds light on WPT's challenges in biomedical implants while offering potential solutions.

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“…Xiao et al proposed a detailed study on the pacemaker WPT system's safety and determined the optimal working frequency band based on inductor/capacitor/capacitor/series (LCC-C) topology. However, the research did not consider the volume issue of the compensating inductors [17]. Mahmood et al presented a wireless power transmission system based on spider web-coil (SWC-MRC), which successfully achieved a 5 V DC voltage output when charging biomedical implant (BMI) devices.…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer System for Cardiac Pacemakers Based on Multi-coil Series Magnetic Integration

Yan,

Yao,

Chen

et al. 2024

PIER C

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We proposed a wireless power transfer system for cardiac pacemakers utilizing a multi-coil series magnetic integrated inductor-capacitor-capacitor/none (LCC-N) circuit topology operating at 50 kHz to reduce the volume of wireless power transfer systems for implanted pacemakers. Firstly, we established a mathematical model of LCC-N compensation topology and analyzed the relationship between the mutual inductance of the compensation and receiving coil and the system's transmission efficiency. The conclusion that the anti-offset performance of the system can be improved by using the change of the mutual inductance value was obtained. Secondly, the optimal coil structure was obtained via parameterized scanning, and a wireless power transfer system model for LCC-N was established for finite element simulation. The comparison of magnetic field strength was made between integrated and traditional non-integrated structures under aligned and offset conditions. Finally, the finite element simulation software ANSYS was adopted to establish a human body model, analyze the electromagnetic interference of the system to the human body, and evaluate the system's safety. Experimental results validated that the transmission efficiency of the system can reach 68.37%, and the output power was 1.47 W under multicoil series magnetic integrated structure when the transmission distance was 8 mm. The transmission efficiency remained 57.87% even with a horizontal offset of 8 mm, which is 13% higher than the traditional non-integrated structure.

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Safety Enhancement by Optimizing Frequency of Implantable Cardiac Pacemaker Wireless Charging System

Cited by 15 publications

References 33 publications

Research on dual‐coupled wireless power transfer system for cardiac pacemaker based on integrated coils

Research on dual‐coupled wireless power transfer system for cardiac pacemaker based on integrated coils

Survey of near-field wireless communication and power transfer for biomedical implants

Wireless Power Transfer System for Cardiac Pacemakers Based on Multi-coil Series Magnetic Integration

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