Occupational lung disease (silicosis) in Viet Nam occupied the highest rate among occupational diseases and have an increasingly trend in a near future. The most important branches are coal mines, heavy industry, rock exploitation, construction, etc. Studies on prevalence and estimating the number of cases are important to set - up the prevention strategies for control and elimination of silicosis in Viet Nam.
Occupational Diseases ; Silicosis

The prevalence of pulmonary silicosis was investigated among 387 randomly selected underground coal-mine workers. Out of these, 37 cases diagnosed with pulmonary silicosis (9.6%). Diggers appeared to be at higher risk of developing silicosis than others, with prevalence rate ratio of 3.3 (95% CI, 1.38 - 7.92). There was a significant relationship between length of exposure and risk of pulmonary silicosis (Chi square for trend, p = 0.001). Underground coal-mine workers with more than years of exposure were found to have increased rates of silicosis than those with less than years (prevalence rate ratio = 4.0) (95% CI: 1.88-8.53). The rate of silicosis among smokers was significantly higher than among non-smokers, prevalence rate ratio = 7.9 (95% CI: 3.7 - 17). Free silica content in the coal dust was found to be high (range from 11.2 to 39.2%). This study has highlighted the problem that free silica does exist in the coalmines of ViÖt Nam and the workers, especially the diggers, are at risk of developing pulmonary silicosis. More comprehensive medical surveillance should be carried out in the future with the participation of the different ministries and coal corporations
Silicosis ; Prevalence ; Lung Diseases

Pulmonary dust (mainly silicosis) is a serious occupational disease not only severely influences people health but also cause the death. The silicosis prevention and control is not only responsibility of health sectors but also general responsibility of society. In order to strengthen the silicosis prevention and control, treatment of nursing, it should have combination of intersectors and general community to implement uniform and effective solutions proposed
Silicosis ; Prevention & control

The methods used descriptive epidemiology, investigation of working environment, clinical examination, chest X-ray, and examination of respiratory function and silicosis. The target groups are 1204 workers producing constructional materials. The finding indicated that the dust concentration with free silic is higher than that of maximum acceptance. The prevalence of silicosis is 7.8% with the categories from 1/0p to 2/1q. There are also 77 cases which suspected to be suffered of category 0/1p (6.4% of 1204 studied workers). Base on the above data it is recommended that the designing, installation of exhausting apparatus at the workplace and use of individual protecting equipment (mask...) are necessary and most effective in silicosis prevention
Silicosis ; Manufactured Materials

A prospective study was carried out on 75 patients in which there were 54 Silic-silicosis patients (BBP- Si) to investigate the change of lung artery pressure in the patients with silicosis. The participants were divided into 2 groups: control group included 21 patients who had no cardiological or respiratory diseases; BBP-Si group included 54 patients. Results: the incidence rate of p type was high: 44 cases (81.5%), q type had 8 cases (14.8%). Injuries of level 1 had the highest rate (62.9%). In the BBP-Si group, the mean value of systolic lung artery pressure and the mean value of lung artery pressure were higher than that of control group with p<0.001 and p<0.05, respectively. The mean value of diastolic lung artery pressure did not change. Systolic and average lung artery pressure increased high in the group of mass fibrosis.
Silicosis ; Pulmonary Artery

Humans ; Silicosis ; prevention & control

Silicosis ; diagnosis ; Terminology as Topic

These radiologic studies were carried out on 265 cases of silicosis which were diagnosed clinically atindustrial Accident Hospital affiliated with Catholic Medical Collage, suring the period of 3 years from 1974 to1976. 265 cases of silicosis consisted of 96 cases (35%) of coal miner, 91 cases (34%) of coal choicer and 82cases (31%) of others. The average age was 42.2 years and average working period was 9.2years. Qualitative andquantitative features in the analysis of roentgen findings were based on UICC/Cincinnati and KLO classification.The qualitative features showed 26% of "p" opacity, 46% of "q" opacity 4% of "r" opacity as rounded profusion and5% of "s" opacity, 11% of "t" opacity, 2% of "u" opacity as irregular profusion of small opacities.Large opacitiesshowed 3% of group A, 2% of group B and 1% of group C. Quantitative features revealed 25% of Type 1, 54% of Type2, 16% of Type 3 and 5% of Type 4. The qualitative and quantitative features showed significant differences as ageand working period increased with age and working period. Major complications were pulmonary emphysema,tuberculosis and pleural abnormalities.
Coal ; Miners ; Silicosis

Humans ; Pneumothorax ; therapy ; Silicosis ; therapy

Adult ; Aspergillosis ; diagnosis ; etiology ; Diagnostic Errors ; Humans ; Lung Diseases, Fungal ; diagnosis ; etiology ; Male ; Silicosis ; diagnosis ; microbiology ; Silicotuberculosis ; diagnosis ; etiology ; Tuberculosis, Pulmonary ; diagnosis ; etiology