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Proceedings Paper

Immunity of medical electrical equipment to radiated RF disturbances
Author(s): Jan Mocha; Dariusz Wójcik; Maciej Surma
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Paper Abstract

Immunity of medical equipment to radiated radio frequency (RF) electromagnetic (EM) fields is a priority issue owing to the functions that the equipment is intended to perform. This is reflected in increasingly stringent normative requirements that medical electrical equipment has to conform to. A new version of the standard concerning electromagnetic compatibility of medical electrical equipment IEC 60601-1-2:2014 has recently been published. The paper discusses major changes introduced in this edition of the standard. The changes comprise more rigorous immunity requirements for medical equipment as regards radiated RF EM fields and a new requirement for testing the immunity of medical electrical equipment to disturbances coming from digital radio communication systems. Further on, the paper presents two typical designs of the input block: involving a multi-level filtering and amplification circuit and including a solution which integrates an input amplifier and an analog-to-digital converter in one circuit. Regardless of the applied solution, presence of electromagnetic disturbances in the input block leads to demodulation of the disturbance signal envelope. The article elaborates on mechanisms of amplitude detection occurring in such cases. Electromagnetic interferences penetration from the amplifier’s input to the output is also described in the paper. If the aforementioned phenomena are taken into account, engineers will be able to develop a more conscious approach towards the issue of immunity to RF EM fields in the process of designing input circuits in medical electrical equipment.

Paper Details

Date Published: 19 April 2018
PDF: 6 pages
Proc. SPIE 10715, 2017 Radioelectronic Systems Conference, 1071507 (19 April 2018); doi: 10.1117/12.2317672
Show Author Affiliations
Jan Mocha, Institute of Medical Technology and Equipment ITAM (Poland)
Dariusz Wójcik, Silesian Univ. of Technology (Poland)
Maciej Surma, Silesian Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 10715:
2017 Radioelectronic Systems Conference
Adam Kawalec; ANDRZEJ WITCZAK, Editor(s)

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