Laboratory Measurement of Hazardous Fumes and Gases at a Point Corresponding to Breathing Zone of Welder during a CO2 Arc Welding.

Saito, Hiroyuki; Ojima, Jun; Takaya, Mitsutoshi; Iwasaki, Takeshi; Hisanaga, Naomi; Tanaka, Shigeru; Arito, Heihachiro

doi:10.2486/indhealth.38.69

Cited by 23 publications

(11 citation statements)

References 27 publications

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“…These results indicate an obstructive rather than a restrictive ventilatory defect. Small airways were found to be significantly affected in welders (based on the values of FEF 25 , FEF 50 , FEF 75 ,FEF ), although no statistically significant difference was found with FEV 1 and PEF values, showing central airway activity was decreased in welders compared to controls. However the decrease in the FEV 1 /FVC ratio was statistically significant (p<0.05).…”

Section: Discussionmentioning

confidence: 91%

“…In welders, FEV 1 and PEF values were found to be decreased 5% and 9%, respectively, but this decrease was not statistically significant (p>0.05). Also FVC values were similar in both controls and welders (p>0.05).…”

Section: Discussionmentioning

confidence: 96%

“…The fumes are chemically very complex and arise primarily from filler metals, electrode coating or cores. It is obvious that, during the welding process, workers are exposed to all of these agents 1) . Most welding materials are alloy mixtures of metals that contain iron, manganese, silica, chromium, nickel, and others.…”

mentioning

confidence: 99%

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Oxidant‐Antioxidant Status and Pulmonary Function in Welding Workers

Fidan¹,

Ünlü²,

Köken³

et al. 2005

Journal of Occupational Health

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Oxidant-Antioxidant Status and Pulmonary Function in Welding Workers: Fatma FIDAN, et al. Department of Pulmonary Diseases, Turkey-Welding is a process during which fumes, gases, electromagnetic radiation and noise are emitted as by-products. Metal oxide particles are particularly hazardous components of welding fumes. Welding has been found to be associated with respiratory symptoms and our objective in the present study was to study the effects of welding on pulmonary function and serum oxidant-antioxidant status. Fifty-one welding workers and 31 control subjects were recruited. Face to face interviews were conducted using the respiratory illness questionnaire adapted from the American Thoracic S o c i e t y w i t h t h e a d d i t i o n o f d e m o g r a p h i c characteristics, work history and working conditions. Additionally physical examinations and spirometric measurements were performed at workplaces. Thiobarbituric acid reactive substances (TBARS), protein carbonyls, protein sulfhydryls (SH) and erythrocyte reduced glutathione (GSH) levels were measured to evaluate oxidant-antioxidant status in 34 welding workers and in 20 control subjects. No statistically significant differences were observed in age, height, weight, body mass index (BMI), smoking status and annual working durations between welding workers and controls. Coughing, sputing and wheezing were significantly higher in welding workers (p<0.05). When adjusted for age, BMI and smoking status in logistic regression, welding work showed a significant risk for chronic bronchitis (OR: 4.78, 95%CI: 1.30-17.54). Forced expiratory volume in one second (FEV 1 )/forced vital capacity (FVC) and four parameters of forced expiratory flow (FEF: FEF 25 , FEF 50 , FEF 75 , FEF 25-75 ) levels measured in the welding workers were significantly lower than those in the control group (p<0.05). Serum TBARS and protein carbonyl levels were higher in welding workers than those in controls (p<0.001, p<0.05, respectively). On the other hand, total protein SH groups and GSH levels were significantly lower in welders than those in controls (p<0.05, p<0.001, respectively). Pulmonary function tests and oxidant-antioxidant status were found to be negatively affected in welding workers chronically exposed to welding fumes and gases. Preventive measures should be taken to improve the health status of these workers. (J Occup Health 2005; 47: 286-292)

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 96%

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Oxidant‐Antioxidant Status and Pulmonary Function in Welding Workers

Fidan¹,

Ünlü²,

Köken³

et al. 2005

Journal of Occupational Health

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“…1-C) was operated for "bead-on-plate" welding with a solid wire on a mild steel plate (MG-50T, JIS Z 3312 YGW12, Kobe Steel Co., Ltd., Japan). The other conditions of welding operation were the same as those described in the previous paper 2) . The welding robot and the working table were enclosed into 1450 × 1450 × 1400 mm in size with aluminum sheet (Fig.…”

mentioning

confidence: 99%

“…CO concentration was found to range from 16 to 21 ppm which lay below the occupational exposure limit value of 50 ppm set by JSOH. The present exposure system can not afford mimicking exposure of welders to CO, because welders were exposed to much higher CO concentration during the CO 2 arc welding operation 2) . Figure 2 shows time-course changes in relative breathing frequency and tidal volume of 5 rats immediately after a single exposure to welding fumes and gases.…”

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confidence: 99%

Construction of an Exposure Chamber for Animals and Its Use for Inhalation Exposure to Welding Fumes and Gases.

et al. 2000

Self Cite

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An inhalation exposure system, consisting of an inhalation chamber and an generating and feeding device for welding fumes and gases with a welding robot, was constructed and examined for its application to experimental toxicology for ventilatory responses of conscious rats to welding fumes and gases. The exposure system allowed an inhalation of fresh welding fumes and gases, and could supply airflow containing stable concentrations of fumes and ozone even the levels exceeding those corresponding occupational exposure limit values were supplied into the exposure chamber. The air temperature in the chamber was kept constant under rat's physiological conditions. Rats were exposed to fresh welding fumes and gases and examined for their ventilatory responses with a body plethysmograph in the chamber. A transient increase in breathing frequency with a concomitant decrease in the tidal volume was observed within several minutes immediately after the start of welding operation. The rapid, shallow breathing response disappears after repeated exposures, indicating rapid adaptation of this ventilatory response to inhalation of welding fumes and gases.

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Capture Efficiency of Integral Fume Extraction Torches for GMA Welding — Part 1

Marconi¹,

Bravaccini²

2010

Weld World

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Laboratory Measurement of Hazardous Fumes and Gases at a Point Corresponding to Breathing Zone of Welder during a CO2 Arc Welding.

Cited by 23 publications

References 27 publications

Oxidant‐Antioxidant Status and Pulmonary Function in Welding Workers

Oxidant‐Antioxidant Status and Pulmonary Function in Welding Workers

Construction of an Exposure Chamber for Animals and Its Use for Inhalation Exposure to Welding Fumes and Gases.

Capture Efficiency of Integral Fume Extraction Torches for GMA Welding — Part 1

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