Wireless and inductively powered implant for measuring electrocardiogram

Abstract

The development of an active implantable device for measuring electrocardiogram (ECG) is presented. The study is a part of a project which aims at developing implantable ECG instrumentation with wireless data and power transfer ( http://www.ele.tut.fi/tule ). The developed implant presented here has all the measurement electronics as well as power and data communication instrumentation included. The implant itself contains no battery, while power for the implant is transferred electromagnetically from an external reader device. The results of testing the implant attached on the body surface and in vitro in a water container are also presented. The developed system was also successfully tested in in vivo measurements, which were conducted on four cows with an implantation time of 24 h. The in vivo testing of implant in cows was conducted by a veterinarian in supervised conditions under approved animal experiment licence.

Barrier properties of polymer encapsulation materials for implantable microsystems

“…WVTR was calculated of the silicone and parylene C double layer (sample 3) utilizing measured relevant monolayer parameters as followed: 3 1 2…”

“…Biocompatible polymers are increasingly used as encapsulation material for implantable electronic medical devices due to their advantages in weight, space, processing, various chemical and mechanical properties and electromagnetic permeability [1][2][3]. Especially for systems, which require a wireless communication between implant and control unit outside the human body or a mechanical adaptation of the implant interface to the surrounding tissue, polymer encapsulations are preferred [4][5][6].…”

Thermal Energy Based Resonant Inductively Coupled Wireless Energization Method for Implantable Biomedical Sensor

“…Biomedical implantable electronic devices have been considered as an imperative segment to facilitate the health observation, diagnosis, and therapeutic in modern medicines for patients [1][2][3][4][5]. Nonetheless, intelligent biomedical implantable sensors are vital for decisively sick patients for spontaneous remote patient monitoring with accurate & continuous health observation to boost the quality of care and patient autonomy.…”

Accurate Localization of Passive Sensors Using Multiple Impedance Measurements

“…For example, providing a power and data link to implants using inductive coupling is a task often encountered in the medical field (see e.g. [1]). Furthermore, in the context of mobile devices, inductive near field communication is becoming an important technology for high-speed data transfer [2] and cutting-edge applications such as mobile payment [3].…”