The paper is focused on a kind of portable monitor that is widely used in military hospitals. In order to study the electromagnetic radiation immunity of the monitor, the experiments of electromagnetic radiation caused by radio frequency continuous wave in reverberation chamber and by ultra wide band (UWB) electromagnetic pulse have been done. The study results show that UWB electromagnetic pulse interferes observably the operating state of the monitor. It should be paid high attention to take protective measures. The monitor tested has some electromagnetic immunity ability for radio frequency continuous wave radiation. The frequent abnormal phenomena are baseline drift and waveform distortion. The electromagnetic sensitivity of the monitor is related to the frequency of interference source. The monitor tested is most sensitive to the frequency of 390 MHz.
Electromagnetic Fields ; Electromagnetic Radiation ; Monitoring, Physiologic ; instrumentation

Electromagnetic Fields ; Electromagnetic Radiation ; Humans ; Mitochondria ; radiation effects

In order to compare the radiation immunity test level of ISO 14708 series standards and the domestic and international environmental radiation standards and then to ascertain whether the radiated immunity test level has reached the limit of the radiation strength in the relevant radiation environmental standards, this paper calculated the radiation field intensity and power density according to the radiated immunity test of ISO 14708 standards, and compared with the limit of ICNIRP 1998 and GB 8702-2014.
Electromagnetic Fields ; Electromagnetic Radiation ; Immunity ; Prostheses and Implants ; Radiation Dosage

Concerning on the safety risks caused by electromagnetic interference of patients implanted with high-risk active implantable medical devices in the environment of domestic MUs, this study evaluates and focuses on the requirements of electromagnetic compatibility in domestic and international standards for rail transit vehicles, the main mechanism of risks caused by EMI, the actual measurement of environmental data in MUs and the working performance of various active implantables in the compartment. The test results shows that all kinds of active implantable medical device samples works normally in the CRH2A EMU in China, and there is still a large margin between the measured radiation emission in MU and the limit required by the standards.
China ; Electromagnetic Fields ; Electromagnetic Radiation ; Humans ; Pacemaker, Artificial ; Prostheses and Implants

OBJECTIVETo predict the impact of MF radiation on human health.

METHODSThe vertical distribution of field intensity was estimated by analogism on the basis of measured values from simulation measurement.

RESULTSA kind of analogism on the basis of geometric proportion decay pattern is put forward in the essay. It showed that with increasing of height the field intensity increased according to geometric proportion law.

CONCLUSIONThis geometric proportion prediction model can be used to estimate the impact of MF radiation on inhabited environment, and can act as a reference pattern in predicting the environmental impact level of MF radiation.

Action of electromagnetic radiation exerting on human body has been a concerned issue for people. Because electromagnetic waves could generate an electric stress in a discontinuous medium, we used the finite difference time domain (FDTD) as calculation methods to calculate the electric stress and its distribution in human head caused by high-frequency low-power electromagnetic environment, which was generated by dual-band (900 MHz and 1 800 MHz) PIFA antennas with radiated power 1 W, and we then performed the safety evaluation of cell phone radiation from the angle whether the electric stress further reached the human hearing threshold. The result showed that there existed the electric stress at the interface of different permittivity organization caused by the two kinds of high-frequency low-power electromagnetic environment and the maximum electric stress was located at the interface between skin and air of the phone side, and the electric stress peak at skull did not reach the threshold of auditory caused by bone tissue conduction so that it can not produce auditory effects.
Auditory Threshold ; Cell Phone ; Electricity ; Electromagnetic Fields ; Electromagnetic Radiation ; Head ; radiation effects ; Humans

Blood-Brain Barrier ; radiation effects ; Capillary Permeability ; radiation effects ; Electromagnetic Radiation ; Humans

Electromagnetic Fields ; Environmental Exposure ; Humans ; Radiation Dosage ; Threshold Limit Values

Solar urticaria is an uncommon disorder characterized by rapid development of urticarial reaction in areas of skin exposed to nonizing electromagnetic radiation. Herber and Baer classified solar urticaria into eight types on the basis of action spectrum and passive or reverse passive transfer ability. We report two cases of type ]g solar urticaria which were activated by visible light and negative in both passive and reverse passive transfer test.
Electromagnetic Radiation ; Intradermal Tests ; Light ; Skin ; Transfer (Psychology) ; Urticaria*

OBJECTIVE: This study is aimed to see ultrastructural changes of pineal gland in rats exposed to microwaves. METHODS: We conducted an experiment by exposing rats at the electromagnetic wave frequency of 2.45GHz, using with an EMR(electromagnetic radiation) emitting apparatus to study the effect of electromagnetic wave on the pineal gland. Paying especial attention to measure damages to pineal gland cells in the brain, we set the levels of EMR according to the duration of electromagnetic wave exposure at 1.2 joules(20min exposure), 2.4 joules(40min exposure), 3.6 joules(60 min exposure), and 4.8 joules(80min exposure) per 1cm2. RESULTS: Compared with normal cells, main histologic changes were observed with an electron microscope included swelling of the pineal gland cells, a decrease in the electron density of interstitial tissue, an increase in the distances between pineal gland cells, an increase in number of lipid-droplets, and swelling of mitochondria. Especially in those pineal cells exposed to EMR for 80 min, severe swelling of mitochondria and a slight increase in lysosome were observed. CONCLUSION: The authors could identify the harmful effect of microwave by observing abnormal ultrastructural changes of pineal cell in rat according to the increasement of electromagnetic radiation.
Animals ; Brain ; Electromagnetic Radiation ; Lysosomes ; Microwaves* ; Mitochondria ; Pineal Gland* ; Rats*