Format

Send to

Choose Destination
Med Pr. 2017 Jun 27;68(4):469-477. doi: 10.13075/mp.5893.00399. Epub 2017 Jun 27.

[Evaluation of hazards caused by magnetic field emitted from magnetotherapy applicator to the users of bone conduction hearing prostheses].

[Article in Polish; Abstract available in Polish from the publisher]

Author information

1
Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy / Central Institute for Labour Protection - National Research Institute, Warszawa, Poland (Pracownia Zagrożeń Elektromagnetycznych / Laboratory of Electromagnetic Hazards). pazra@ciop.pl.
2
Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy / Central Institute for Labour Protection - National Research Institute, Warszawa, Poland (Pracownia Zagrożeń Elektromagnetycznych / Laboratory of Electromagnetic Hazards). jokar@ciop.pl.
3
Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy / Central Institute for Labour Protection - National Research Institute, Warszawa, Poland (Pracownia Zagrożeń Elektromagnetycznych / Laboratory of Electromagnetic Hazards). krgry@ciop.pl.
4
Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy / Central Institute for Labour Protection - National Research Institute, Warszawa, Poland (Pracownia Zagrożeń Elektromagnetycznych / Laboratory of Electromagnetic Hazards).

Abstract

in English, Polish

BACKGROUND:

Low frequency magnetic field, inducing electrical field (E<sub>in</sub>) inside conductive structures may directly affect the human body, e.g., by electrostimulation in the nervous system. In addition, the spatial distribution and level of E<sub>in</sub> are disturbed in tissues neighbouring the medical implant.

MATERIAL AND METHODS:

Numerical models of magneto-therapeutic applicator (emitting sinusoidal magnetic field of frequency 100 Hz) and the user of hearing implant (based on bone conduction: Bonebridge type - IS-BB or BAHA (bone anchorde hearing aid) type - IS-BAHA) were worked out. Values of E<sub>in</sub> were analyzed in the model of the implant user's head, e.g., physiotherapist, placed next to the applicator.

RESULTS:

It was demonstrated that the use of IS-BB or IS-BAHA makes electromagnetic hazards significantly higher (up to 4-fold) compared to the person without implant exposed to magnetic field heterogeneous in space. Hazards for IS-BAHA users are higher than those for IS-BB users. It was found that applying the principles of directive 2013/35/EU, at exposure to magnetic field below exposure limits the direct biophysical effects of exposure in hearing prosthesis users may exceed relevant limits. Whereas applying principles and limits set up by Polish labor law or the International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines, the compliance with the exposure limits also ensures the compliance with relevant limits of electric field induced in the body of hearing implant user.

CONCLUSIONS:

It is necessary to assess individually electromagnetic hazard concerning hearing implant users bearing in mind significantly higher hazards to them compared to person without implant or differences between levels of hazards faced by users of implants of various structural or technological solutions. Med Pr 2017;68(4):469-477.

KEYWORDS:

Directive 2013/35/EU; bone conduction; electromagnetic fields; hearing implants; induced electric field; numerical simulations

PMID:
28655937
DOI:
10.13075/mp.5893.00399
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Nofer Institute of Occupational Medicine
Loading ...
Support Center