Respiratory symptoms and pulmonary function among welders working with aluminum, stainless steel and railroad tracks.
研究了铝、不锈钢和铁路轨道焊接工人的呼吸道症状和肺功能，发现所有焊接组慢性支气管炎症状频率高于对照组，症状与特定金属暴露相关，但肺功能未受影响。
Sixty-four aluminum welders, 46 stainless steel welders, and 149 railroad track welders were investigated regarding respiratory symptoms and pulmonary function (forced vital capacity and forced expiratory volume in 1 s). Referents consisted of nonwelding industrial workers and railroad workers. All groups of welders showed a higher frequency of chronic bronchitis symptoms than their respective referents. Respiratory symptoms were related to ozone concentrations in welders working with aluminum. In stainless steel and railroad track welders respiratory symptoms were related to chromium exposure rather than to total particle exposure. The pulmonary function was not affected in any of the welding groups studied.