Implantable Pacemaker Low Power Telemetry Unit

Abstract

A low power RF wireless telemetry network in an implantable pacemaker is placed within a body. EZ430-RF2500 target board with ultra-low power processor MSP430F2274, transreceiver CC2500, and IAR workbench is used for experimentation. Due to the hacking limitations of the Internet of Things (IOT), a wireless network using self-organizing SimpliciTi protocol is used for realization. A low power design approach for wireless battery status investigation of implantable pacemaker and transmission power is estimated with respect to transmission period. Considering magnet mode, a record of beats per minute investigates battery status i.e. end of life (EOL) and beginning of life (BOL) etc. A magnet of suitable strength is placed in the closed proximity of an implanted device, thereby switching a reed switch. An RF wireless method with SimpliciTi protocol is realized for battery voltage investigation instead of reed switch. Inbuilt 10-bit ADC is used to sense and convert battery voltage into a digital signal. IOT is an effective communication medium today. Especially in a battery-operated sensor network, a signal transmission interval is a power critical factor. Basically, in an implantable pacemaker, wireless investigation of battery voltage and EGM is important in order to check battery status as well as to control various pacing parameters. Battery longevity is estimated with respect to battery voltage measurement and a review of methodology implementation for the EGM signals from endocardium and epicardium nodes is presented. Study and analysis of a low power wireless network is an innovative approach for design and development of low power telemetry systems.