University of Oulu

M. Särestöniemi et al., "Comprehensive Study on the Impact of Sternotomy Wires on UWB WBAN Channel Characteristics on the Human Chest Area," in IEEE Access, vol. 7, pp. 74670-74682, 2019. doi: 10.1109/ACCESS.2019.2920067

Comprehensive study on the impact of sternotomy wires on UWB WBAN channel characteristics on the human chest area

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Author: Särestöniemi, Mariella1; Pomalaza-ráez, Carlos2; Bi, Zhuming3;
Organizations: 1Centre for Wireless Communications, Faculty of Information Technology and Electrical Engineering, University of Oulu, FI-90014 Oulu, Finland
2Department of Electrical and Computer Engineering, Purdue University, Fort Wayne, IN 47907, USA
3Department of Civil and Mechanical Engineering, Purdue University, Fort Wayne, IN 47907, USA
4Electronics and Telecommunication System Research Group, National School of Applied Sciences (ENSA), Ibn Tofail University, Kenitra 14010, Morocco
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 18.3 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2019
Publish Date: 2019-10-16


This paper presents a comprehensive study on the impact of the sternotomy wires on the characteristics of ultra wideband (UWB) radio propagation channel in the human chest area. The study is conducted using two simulation models: a planar layer model and a three-dimensional elliptical layer model. The study includes antennas designed for on-body and in-body communications. Furthermore, the measured data and propagation path calculations are presented to verify the simulation results. The main purpose is to show how the steel wires affect the on-body channel characteristics and in-body propagation within the tissues when the monitoring antennas are located in close vicinity of the human body. The study is conducted by evaluating: 1) channel characteristics in both frequency and time domains; 2) 2D power flow figures; and 3) Poynting vector values. Furthermore, the impact of the fat layer thickness on the visibility of sternotomy wires is studied. Moreover, the impact of sternotomy wires is studied for the case of the recently operated patient, for which the sternotomy wires are on the sternum bone surface, as well as for the case where the sternotomy wires are embedded into the sternum bone. It is found that sternotomy wires have a clear impact on the channel. The strength of the impact depends on the antenna types used by the monitoring devices, the thickness of the fat layer in the sternum area, and whether the sternotomy wires are on the sternum surface or whether they have already been embedded on the sternum as it happens with time.

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Series: IEEE access
ISSN: 2169-3536
ISSN-E: 2169-3536
ISSN-L: 2169-3536
Volume: 7
Pages: 74670 - 74682
DOI: 10.1109/ACCESS.2019.2920067
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported in part by the project WBAN Communications in the Congested Environments, and in part by the Academy of Finland 6Genesis Flagship under Grant 318927.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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