Preliminary studies on thyroid function in welders

Abstract

During welding operation, workers are exposed to welding fumes containing various toxic metals and their oxides, certain gases, radiation, and high temperature1,2). Health hazards and biological effects associated to these exposures have been extensively studied1-3), however, thyroid function has received very little attention. There are a few reports available, which indicate that some metals including aluminium, cadmium, lead, and mercury can alter thyroid function4,5). In addition, exposure to radiation, and high temperature are also known to have their impact on thyroid function. Studies reported6) earlier from this Institute indicated that metals like manganese, iron, and zinc form the main constituents of welding fumes while chromium, nickel, copper, cadmium, and lead were found in trace amounts; significantly higher levels of these metals including chromium, nickel, copper, and cadmium were also found in blood of welders. Keeping in view the above facts, we have conducted a pilot study to assess thyroid function in welders working in small-scale industrial settings.