Medical Implant Applications and Medical Frequency Band

1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Medical Implant Applications and Medical Frequency Band Date Submitted: 00 July, 2013 Source: Dong-Wook Seo, Hyung Soo Lee Company: ETRI Address: 488-23 YongBong-ri, Yuga-myeon, Dalseong-gun, Daegu, 711-883, Korea Voice: +82-53-670-8056, FAX: +82-53-670-8008, E-Mail: seodongwook@etri.re.kr Re: [n/a] Abstract: Provideapplications ofmedical implant device that requires low power. And request the additional frequency band of the ULP for the implantable medical device. Purpose: Response to the IEEE802.15 TG4q call for applications Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

2. Medical Implant Applications and Medical Frequency Band of 401-406 MHz Dong-Wook Seo*, Hyung Soo Lee ETRI

3. Purpose and Contents • purpose • To provideapplications oftheimplantable medical device that requires low power • To request additional frequency bands of the ULP for the implantable medical device • contents • Requirements of the Implantable Medical Device • Implantable Continuous Glucose Monitoring System • Implantable Cardiac Arrhythmia Monitoring System • Medical Implant Frequency band • Summary

4. Implantable Medical Device • basic requirements of the Implantable medical device • application fields • patient monitoring : blood pressure, cardiac arrhythmia, glucose sensor • assistant, medical cure: cochlear implant, deep brain stimulator • and so on. • physical small size • minimum external component count • integrated sensor by MEMS technology • low power consumption • tens μW – several mW • limited power of the implant battery • stable power supply for several years • wireless power transfer system • energy harvesting • can support only several μA current deep brain stimulator/ brain liquid pressure sensor audio neuro stimulator cardiac arrhythmia monitor/recorder blood pressure monitor glucose sensor power requirements of IMDs [1]

5. Implantable Continuous Glucose Monitoring System • transmitter with the implantable glucose sensor • transmits glucose sensing data • receiver with display and inter-networking • saves, analyzes and displays data • implant position • abdomen, brachium, wrist • data rate • ~ 1 kbps • the wireless power transfer asa power supply • to last more than a month after charging • inductive coupling using the coil withhigh L and high Q implanted glucose sensor 1. abdomen 2. brachium 3. wrist Insulin pump receiver/gateway

6. Implantable Cardiac Arrhythmia Monitoring System • transition of a body-worn type to an implant type • reduce the noise caused by movement and clothes • User can not remove or forget the system. • The authorized patients only use the system. • implant position • precordium, subclavian, arm • data rate • < 10 kbps • wireless power transfer • to continuously monitor for more than one yearusing the rechargeable battery base electrode 1cm main electrode(platinum) heart call (body-worn system) [4] 2cm 1.5cm lead fixture 1cm 1cm 1. precordium 2. subclavian 3. arm implant sensor ECG sensor

7. Status of Frequency Usage of 401-406 MHz Band • spectrum for implant device inside a human body • Medical Implant Communication Service (MICS) • ITU : 401-406 MHz • USA, Europe, Korea : 402-405 MHz (core band) • spectrum for medical device worn on a human body • 401-402, 405-406 MHz (wing band) • USA : Medical Device Radiocommunication Service (MedRadio) • Europe : MEdical Data Service (MEDS) • Korea : will be allocated in 2014 402 403 401 404 405 406 MHz 401 406 401 402 405 406

8. Medical Frequency Band of 401-406 MHz • The medical device is a representative application requiring the ULP technology. • The MICS band and the adjacent frequencies are required as the ULP band. • MICS band : 402-405 MHz • MedRadio/MEDS band : 401-402 MHz, 405-406 MHz • The IEEE 802.15.6 has already completed the channel model of MICS.

9. Summary • The ULP technology is useful for applications including the implantable medical device. • The implantable medical device has essentially the characteristic of ultra low power consumption. • The ULP should support the data rate of less than 10 kbps. • Most implantable medical devices do not need the high data rate of 1 Mbps. • The additional frequency bands of the ULP are required. • MICS band (401-406 MHz) • MedRadio/MEDS band (401-402 MHz, 405-406 MHz)

10. Thank you for your attention!

11. Reference • [1] doc.: IEEE 802.15-08-0766-01-0006, “Biological Effects of WPT systems for MICS and Needs for Standardization of WPT systems” • [2] P. D. Bradley, “Wireless Medical Implant Technology,” Proceedings of the ESSCIRC, 2011. • [3] doc.: IEEE 802.15-08-0360-00-0006, “Continuous Glucose Monitoring” • [4] http://www.uheart.kr/ • [5] Charles S. Farlow, “An Overview of the Medical Device Radiocommunications Service (MedRadio) and Future Telemetry Considerations,” 1st Invitational Workshop on Body Area Network Technology and Applications, June 19-20, 2011.