This work proposes a miniaturized wireless heating strip designed for safe wireless hyperthermia treatment against restenosis. The proposed heating strip was designed to be inserted into a stent that can be deployed in a blood vessel using a typical catheter-based delivery system. The device consists of a micromachined LC-based resonator and a microheater with a temperature regulator (MHTR). The LC-based resonator was employed to achieve wireless resonant RF heating, with the embedded MHTR serving as an electric current breaker in the resonator circuit to maintain the strip’s temperature within a desired range. An acrylate-based composite was used as the key material of the MHTR for temperature sensing and electric-current breaking. The MHTR allows smooth heating regulation in a passive manner, reducing the complexity of the device, and thus further facilitates the miniaturization of the device. The frequency responses to temperature of devices with and without an MHTR were studied. The performance of devices immersed in physiological saline solution was also examined in detail. Wireless heating tests demonstrated that the proposed MHTR effectively maintained the device temperature at around 45 °C with an output RF power of 500 mW. The results indicate that the proposed device potentially offers safe and reliable hyperthermia treatment.

这项工作提出了一种小型化的无线加热条，其设计用于针对再狭窄的安全无线高温治疗。提出的加热条设计成可插入支架，该支架可使用典型的基于导管的输送系统部署在血管中。该设备包括一个基于微机LC的谐振器和一个带有温度调节器（MHTR）的微型加热器。采用基于LC的谐振器来实现无线谐振RF加热，嵌入式MHTR用作谐振器电路中的电流断路器，以将带材的温度保持在所需范围内。丙烯酸酯基复合材料被用作MHTR的关键材料，用于温度传感和电流中断。MHTR允许以被动方式进行平稳的加热调节，从而降低了设备的复杂性，因此，进一步有助于装置的小型化。研究了有无MHTR的设备对温度的频率响应。还详细检查了浸在生理盐水溶液中的设备的性能。无线加热测试表明，建议的MHTR有效地将设备温度保持在45°C左右，输出RF功率为500 mW。结果表明，所提出的设备可能提供安全可靠的高温治疗。无线加热测试表明，拟议的MHTR有效地将设备温度保持在45°C左右，输出RF功率为500 mW。结果表明，所提出的设备可能提供安全可靠的高温治疗。无线加热测试表明，拟议的MHTR有效地将设备温度保持在45°C左右，输出RF功率为500 mW。结果表明，所提出的设备可能提供安全可靠的高温治疗。