The impact of overhead lines for employees with stents

Syrek, P.; Skowron, Mikołaj

doi:10.1088/1757-899x/200/1/012013

Cited by 11 publications

(3 citation statements)

References 12 publications

(9 reference statements)

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“…Study [4] has shown that short-term exposure to a high voltage power and low frequency environment poses a threat to kidneys of rats. In [5], the authors have shown that if there is a safe distance for employees with stents implanted in the body, the interaction of the line on the stent is negligible. Paper [6] assessed the safety of pectus patients with a concave Nuss bar-implant exposed to a plane wave with a frequency of 64 MHz, using the finite-difference time-domain (FDTD) method.…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Yang

2021

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To evaluate the occupational safety of a high signal operator exposed to the electric field induced by contact wires with a frequency of 50 Hz and a voltage of 27.5 kV, this study established a model of a high signal operator working in the vicinity of singleand double-track railways. The electric field distribution in the operator's body and his head were calculated and analyzed during the operation using the finite element method (FEM). The calculated results were compared with the international standard occupational exposure limits formulated by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) and action levels (ALs), exposure limit values (ELVs) in Directive 2013/35/EU (EU Directive). In the case of a single-track railway exposure, the maximum electric field strength in the worker's body, in the scalp layer, and inside the brain are 227 mV/m, 2.76 kV/m, and 0.14 mV/m, respectively. For a double-track railway exposure, the maximum internal electric field strength of the operator is 310 mV/m, which is 37.85% of the occupational exposure basic restriction limit. The maximum electric field strength in the head layers is 3.42 kV/m, which is 34.2% of the occupational exposure reference level and 34.2% of the low ALs. The maximum electric field strength of the brain is 0.19 mV/m, which is 0.19% of the occupational basic restriction limit and 0.135% of the sensory effects ELVs. Results show that the electric field exposure of the high signal operator to contact wires in single-and double-track railways is lower than the occupational exposure limits provided by the ICNIRP and EU Directive standards and is thus regarded as safe for workers.

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Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Yang

2021

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“…This is mainly due to the induction of eddy currents in metal implantable devices under RF fields [Sawicki et al, 2006;Ye et al, 2015]. Both the passive implants, such as vascular stents [Syrek et al, 2017], metal bar-implants [Miaskowski et al, 2016], hip and orthopedic implants [Kozlov et al, 2015;Miaskowski et al, 2012], prosthetic and dental implants [Safari et al, 2016], as well as the active implants like pacemakers and cardiac implantable devices [Gniadek-Olejniczak et al, 2018;Smondrk et al, 2018], deep brain stimulators [Guerin et al, 2019], etc., interact with the external EMFs produced by communication systems [Mat et al, 2017;Ye et al, 2015] or strong magnetic gradients generated by modern medical diagnostic tools such as magnetic resonance imaging (MRI) devices [Gniadek-Olejniczak et al, 2018;Yao et al, 2019]. Metal implants often prevent their patients from enjoying the benefits of modern civilization including MRI due to severe interactions with active implantable medical devices (AIMD) or discomfort feeling, pain and burning sensations [Zradzinski et al, 2019].…”

Section: Introductionmentioning

confidence: 99%

Implant Safety Tool Application to Assist the Assessment of Radio-Frequency Radiation Exposure

Gas¹,

Miaskowski²

2019

J. Ecol. Eng.

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This paper discusses a new Implant Safety Tool, used to assess the safety of patients with metal implants exposed to radio-frequency (RF) fields. This specialist tool is discussed on the example of pectus patients with titanium bar-implant inserted during the minimally invasive Nuss procedure. The authors created a 3D realistic model of a 34-year-old male patient with a Nuss bar-implant. A numerical analysis based on the finite-difference time-domain (FDTD) method was performed for a far field source in the form of a plane wave with the frequency of 64 MHz, which corresponds to the RF exposure generated by MRI devices at 1.5 T. The obtained results allow concluding that the concave Nuss bar-implant poses no risk during environmental and occupational RF field exposures.

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“…Even if numerous studies have been published over the last 25 years related to human exposure to low-frequency electric and magnetic fields [2][3][4][5][6], the possible connection between the magnetic field generated by appliances and the current consumption has not been investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the influence of the current drawn by the appliance on the close magnetic field

et al. 2019

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<p class="Abstract">The development of technology and the corresponding increase in living standards imply the generalized use of the most diversified and sophisticated equipment, a distinct, significant category being household appliances. The frequent presence of these devices close to a person’s heart, eyes, or brain naturally gives rise to concerns about the level of the associated (low-frequency) magnetic fields. The main objective of our paper is to study the possible correspondence between the low-frequency magnetic field generated by some household appliances and their current consumption. The proposed measurement system consists of the hand-held triple axis 480826 EMF Tester manufactured by Extech Instruments and the 80i-400 Fluke clamp meter. The performed measurement methodology takes into account the operating principles of the appliance. We perform measurements for a large selection of devices (47). The measuring point for the magnetic field is set at 30 cm from the source. Finally, by applying the Biot-Savart law to the previously determined drawn current, we calculate the magnetic field. We also compare the corresponding, directly measured values and analyze them.</p>

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The impact of overhead lines for employees with stents

Cited by 11 publications

References 12 publications

Archives of Electrical Engineering

Archives of Electrical Engineering

Implant Safety Tool Application to Assist the Assessment of Radio-Frequency Radiation Exposure

Analysis of the influence of the current drawn by the appliance on the close magnetic field

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