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Paper Abstract and Keywords
Presentation 2025-07-24 16:40
[Tutorial Lecture] FDTD Analysis of Spatial Propagation Characteristics of Wireless Medical Telemeters -- A Comprehensive Evaluation of Hospitals, Ambulances, and Helicopter Emergency Medical Services --
Isao Kayano, Aya Takayama, Naoko Tanaka (Kawasaki Univ. of Medical Welfare), Tetsuya Motoishi (Kawasaki Medical School Hospital), Seiichi Mochiduki (Kawasaki Univ. of Medical Welfare) AP2025-53
Abstract (in Japanese) (See Japanese page) 
(in English) Wireless medical telemeters are classified as specific low-power radio stations and enable the transmission of various patient vital signs without requiring a license. Due to their high convenience, their use has been rapidly expanding in recent years. Although wireless medical telemeters utilize a dedicated frequency band (420–450 MHz), issues such as radio interference and reception failure have been increasingly reported. Preventing such communication problems is a significant challenge from the perspective of medical safety. This tutorial introduces a method focusing on the electric field strength radiated from wireless medical telemeter transmitters. The spatial propagation characteristics, considering reflections and absorptions caused by hospital structures such as walls and floors, were simulated using the FDTD method. The validity and effectiveness of the simulation were evaluated by comparison with actual measurement results. In addition, we examine the leakage of electromagnetic fields outside of emergency vehicles such as ambulances and helicopter emergency medical services when patients are transported while wearing wireless medical telemeters. Based on these findings, a comprehensive explanation of a risk assessment method for potential interference with telemeters in other medical facilities is provided.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless Medical Telemeter / Electromagnetic Field Propagation / FDTD / Interference Risk Assessment / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 125, AP2025-53, pp. 111-116, July 2025.
Paper # AP2025-53 
Date of Issue 2025-07-16 (AP) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF AP2025-53

Conference Information
Committee AP SANE SAT  
Conference Date 2025-07-23 - 2025-07-25 
Place (in Japanese) (See Japanese page) 
Place (in English) hakodate arena 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Remote sensing, Subsurface Electromagnetic Measurements, Sattelite Communication, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2025-07-AP-SANE-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) FDTD Analysis of Spatial Propagation Characteristics of Wireless Medical Telemeters 
Sub Title (in English) A Comprehensive Evaluation of Hospitals, Ambulances, and Helicopter Emergency Medical Services 
Keyword(1) Wireless Medical Telemeter  
Keyword(2) Electromagnetic Field Propagation  
Keyword(3) FDTD  
Keyword(4) Interference Risk Assessment  
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1st Author's Name Isao Kayano  
1st Author's Affiliation Kawasaki University of Medical Welfare (Kawasaki Univ. of Medical Welfare)
2nd Author's Name Aya Takayama  
2nd Author's Affiliation Kawasaki University of Medical Welfare (Kawasaki Univ. of Medical Welfare)
3rd Author's Name Naoko Tanaka  
3rd Author's Affiliation Kawasaki University of Medical Welfare (Kawasaki Univ. of Medical Welfare)
4th Author's Name Tetsuya Motoishi  
4th Author's Affiliation Kawasaki Medical School Hospital (Kawasaki Medical School Hospital)
5th Author's Name Seiichi Mochiduki  
5th Author's Affiliation Kawasaki University of Medical Welfare (Kawasaki Univ. of Medical Welfare)
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Speaker Author-1 
Date Time 2025-07-24 16:40:00 
Presentation Time 50 minutes 
Registration for AP 
Paper # AP2025-53 
Volume (vol) vol.125 
Number (no) no.125 
Page pp.111-116 
#Pages 6 
Date of Issue 2025-07-16 (AP) 

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