Pneumokonióza ze svařování a jiná respirační onemocnění elektrosvářečů

Pneumoconiosis from Welding and Other Respiratory Diseases in Electro-Welders

The author has been engaged in a long-term observation of the group of 111 electro-welders whose average duration of work atrisk lasted 25 years. The x-ray picture of the subjects was dominated by opacities, p, q, frequency 1, 2 according to the ILOclassification. Following the 11 years of observation there was a partial regression of the X-ray changes. Forty two persons werecompletely shelved from the work, regression of their X-ray changes developed in 36% during the observation of about nine yearson the average. In 11 men the open pulmonary biopsy was performed, showing iron deposits in all cases. In seven of them a minornon-collagen reaction of the lung tissue to the dust was detected, the finding being evaluated as pneumoconiosis from welding. Thefibrosis of uncertain etiology was diagnosed in six per cent on the average, bronchogenic cancer in nine per cent of the observedindividuals. Chronic bronchitis was present in 48% of the cohort at the end of the period of observation. Twenty five persons died,60% of them as a result of lung disease (bronchogenic cancer developed in 32%, cor pulmonale in 28% as a consequence ofchronic lung disease or lung fibrosis). The mean age at the time of death was 59 years. These findings draws attention toa potential risk of welder occupation.

Key words:
welders, X-ray picture, development of the disease, histology, chronic bronchitis, interstitial lung fibrosis, bronchoge-nic cancer, cause of death