Nair Sarath S, Nagesh D S, Shenoy Sachin J, Harikrishnan S
Department of Medical Devices Engineering, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Government of India, Thiruvananthapuram, Kerala, India.
Department of Applied Biology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Government of India, Thiruvananthapuram, Kerala, India.
Artif Organs. 2025 Mar;49(3):390-400. doi: 10.1111/aor.14892. Epub 2024 Oct 22.
The survival rate of LVAD recipients may be improved by eliminating the infection failure mode at the percutaneous lead entry site. Wireless powering through a Transcutaneous Energy Transfer System (TETS) is a promising solution for achieving this. However, automatic controls need to be employed to compensate for the variations in efficiency and power transfer due to changes in load and coil-to-coil gaps.
This article discusses the results of in vitro and animal models performance evaluation of an automatically controlled TETS for powering a Left Ventricular Assist Device.
It was found that power up to 20 W could be transferred at an axial gap of 30 mm. A 5% variation in speed and a 2% change in flow rate are observed with the change in tissue thickness, in porcine carcass model.
The LVAD could be operated at the required RPM irrespective of the change in axial positions.
通过消除经皮导线进入部位的感染失败模式，可提高左心室辅助装置（LVAD）接受者的存活率。通过经皮能量传输系统（TETS）进行无线供电是实现这一目标的一个有前景的解决方案。然而，需要采用自动控制来补偿由于负载和线圈间间隙变化而导致的效率和功率传输的变化。
本文讨论了一种用于为左心室辅助装置供电的自动控制TETS的体外和动物模型性能评估结果。
发现在30毫米的轴向间隙下可传输高达20瓦的功率。在猪尸体模型中，随着组织厚度的变化，观察到速度有5%的变化，流速有2%的变化。
无论轴向位置如何变化，LVAD都可以在所需的每分钟转速下运行。
