Occupational exposure to high frequency electromagnetic fields and its effect on human immune parameters

Area of Science:

• Biomedical Engineering
• Occupational Health
• Immunology

Background:

• Shortwave diathermy devices are used in medical treatments.
• Occupational exposure to electromagnetic fields (EMF) from these devices is a concern.
• Potential health effects, particularly on the immune system, require investigation.

Purpose of the Study:

• To assess the immune system status of physiotherapists chronically exposed to EMF from diathermy equipment.
• To determine if elevated EMF exposure levels correlate with changes in immune cell counts or function.

Main Methods:

• Measurement of electric and magnetic field strength near diathermy devices.
• Calculation of whole-body exposure for medical personnel.
• Blood sampling from exposed physiotherapists and age/sex-matched controls.
• Analysis of total leukocyte and lymphocyte counts.
• Determination of leucocytic subpopulations via flow cytometry.
• Assessment of lymphocyte activity through mitogen-stimulated proliferation assays.

Main Results:

• Considerable excess of recommended exposure limits was recorded near shortwave diathermy devices.
• No statistically significant differences were found in total leukocyte counts, lymphocyte counts, leucocytic subpopulations, or lymphocyte proliferation between exposed and control groups.
• All measured immune parameters in both groups were within established normal ranges.

Conclusions:

• Despite high occupational exposure to electromagnetic fields from diathermy devices, no adverse effects on the immune system of medical personnel were observed.
• Chronic exposure to EMF from these medical devices does not appear to compromise immune function in physiotherapists.
• Further research may be warranted to explore long-term health outcomes, but current immune status appears unaffected.