Evaluating Characteristics of Electrostatic Discharge (ESD) Events in Wearable Medical Devices: Comparison With the IEC 61000-4-2 Standard
Electrostatic discharge (ESD) malfunctions in wearable medical devices have resulted in injuries and deaths. The U.S. Food and Drug Administration (FDA) recommends medical device manufacturers to qualify the electromagnetic compatibility of their products according to the IEC 60601-1-2 collateral standard, within which the IEC 61000-4-2 standard is the recommended ESD immunity test method. This paper shows that the IEC 61000-4-2 standard does not provide adequate immunity for wearable medical devices, due to the differences between the test setup and the real usage. The peak and maximum time derivative of the ESD current and transient magnetic fields were measured during realistic discharge scenarios, where a metal piece, in lieu of a wearable device, was worn around human hand or waist. At five voltage levels from 2 to 10 kV, the peak currents and their maximum time derivatives for realistic discharge scenarios were larger than the most severe discharges obtained from the IEC 61000-4-2 test configuration. This discrepancy between the current results from the IEC 61000-4-2 standard setup and the realistic discharge scenarios indicates that the ESD immunity standard for wearable devices needs to be changed with realistic test configurations, to prevent device malfunctions that can subsequently jeopardize patient safety.
M. Kohani et al., "Evaluating Characteristics of Electrostatic Discharge (ESD) Events in Wearable Medical Devices: Comparison With the IEC 61000-4-2 Standard," IEEE Transactions on Electromagnetic Compatibility, vol. 60, no. 5, pp. 1304 - 1312, Institute of Electrical and Electronics Engineers (IEEE), Oct 2018.
The definitive version is available at https://doi.org/10.1109/TEMC.2017.2773271
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
Biomedical Equipment; Drug Products; Electric Fault Location; Electromagnetic Field Effects; Electrostatic Discharge (ESD); Electrostatics; Laser Optics; Magnetic Fields; Metals; Power Quality; Standards; Transient Analysis; Transients; Wearable Technology; Discharge Currents; IEC Standards; Medical Devices; Transient Magnetic Fields; Wearable Devices; Electrostatic Devices
International Standard Serial Number (ISSN)
Article - Journal
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01 Oct 2018