MO‐F‐CAMPUS‐J‐02: Human Implanted Micro Bio Chip for Real‐Time Atrial Fibrillation Monitoring with Wireless Power Transmission

Abstract

Purpose:There are numerous medical problems whose treatment requires the constant monitoring of vital signs from several body organs. In this study, a micro‐sized implantable electrocardiogram (ECG) sensor for personal heart disease monitoring was developed, as such devices generally provide a high diagnostic yield.Methods:An op‐amp amplifies an input electrical potential to the level desired by the user and produces an output potential augmented to this intended level. For this study an instrumentation amplifier was fabricated using op‐amps and configured to amplify micro‐fine ECG signals by a factor of about 100 using a band‐pass filter (BPF). The proposed ECG sensor has a current consumption of about 11 mA and a noise generation inversely proportional to the length of the wireless communication antenna inside the sensor. The packaging materials selected must be biocompatible to avoid causing inflammation or necrosis of human tissues. In addition, a near‐field wireless power transmission system and the medical Implant Communication Service (MICS) was used as a communications and power protocol. MICS operates in the frequency range of 402–405 MHz and is normally used for communication between body‐worn monitoring systems and implants.Results:A pig was used as a sensor‐implanted animal model because the animal's physiological characteristics are similar to those of humans. An incision was made between the left 5th–7th ribs and separated using blunt dissection to a depth of 4 mm under the skin. From the experiments, we successfully monitor the ECG with wireless communication and wireless power transmission.Conclusion:This study demonstrated that the use of a quasi‐permanentECG employing a double loop coil‐shaped magnetic resonance‐type wireless power transmission system sensor eliminates the need for surgical replacement.