Abstract
Welders inhale gases and respirable particles. To investigate the relationship between fluoride exposure and respiratory symptoms in welders using basic electrodes containing calcium fluoride, 63 railroad track welders were interviewed. Fluoride was measured in post-shift urine samples. Seventeen welders reported respiratory symptoms related to welding fume exposures. Respiratory symptoms were somewhat more common with increasing concentrations of fluoride in urine. The association between welding fume exposure and respiratory symptoms seems related more to fluorides than to other particles among welders using basic electrodes.
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[Acute respiratory distress syndrome induced by hydrogen fluoride gas inhalation].
A 21-year old man was referred to our hospital with severe respiratory distress and diffuse infiltrative shadows on chest radiograph. He had been exposed to irritant gas when polishing the inside of a stainless tank using a chemical cleaner containing hydrofluoric acid and nitric acid. He felt sick immediately after
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Chronic broncopneumopathy and pneumoconiosis in workers employed in phosphoric acid production.
Thirty-five subjects employed in a phosphoric acid producing plant were studied by the authors. The investigation included: history, according to the C.E.C.A. questionnaire for chronic bronchitis and emphysema; physical examination, chest X-ray spirometry and lung diffusing capacity for carbon monoxide by the steady state method (DLCOSS). High prevalence of chronic
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Nonmalignant mortality among workers in six Norwegian aluminum plants
OBJECTIVES: This study investigated the associations between exposure to fluorides and polycyclic aromatic hydrocarbons (PAH) and mortality from nonmalignant diseases among workers in the Norwegian primary aluminum industry. METHODS: Mortality among 10,857 men, employed for more than 3 years in 1 of 6 aluminum plants, was investigated from 1962 to 1996,
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Mortality and cancer morbidity after heavy occupational fluoride exposure
A cohort of 431 male cryolite workers employed for at least six months between 1924 and 1961 was identified from personnel records at the Copenhagen cryolite factory. During this period, heavy fluoride exposure resulted in at least 74 cases of skeletal fluorosis. All workmen in the cohort were followed up
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Royal jelly regulates the caspase, Bax and COX-2, TNF-a protein pathways in the fluoride exposed lung damage in rats
Highlights Royal jelly (RJ) has antiinflammatory and antioxidant activity. RJ protects lung tissue against fluoride damage. RJ up-regulates the expression of caspase-3, caspase-6, caspase-9, Bax and BDNF proteins. RJ down-regulates the expression of bcl-2, COX-2, TNF-a and GSK3 proteins. The study was carried out on 42 male rats divided into
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Fluoride Enhances Toxicity of Beryllium
Occupational exposure to beryllium is well-documented to put workers' health at risk. The two principal targets of beryllium poisoning are the respiratory system and the skin. Of all beryllium compounds, beryllium fluoride complexes (including beryllium fluoride and beryllium oxyfluoride) appear to be the most toxic. As shown below, studies dating back
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Respiratory Risks from Occupational Fluoride Exposure
Starting in the 1930s, scientists have observed that workers exposed to airborne fluorides suffer from an elevated rate of respiratory disorders. For over 50 years, however, US government and industry scientists made repeated assurances that the allowable level of fluoride dusts and gases in industrial workplaces would not cause any
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