What is abestos

abestos (Asbestos) is a generic name used for fibrous silicate minerals (Fibrous mineral silicates) which occur naturally. The fibers are combined into a bundle (Bundle) asbestos divided into two groups abestos Pendleton and Sir Celestine. Which is subdivided into six types.

abestos special feature is a tough, high tensile strength. Tolerate the heat well And are resistant to acids, alkalis and many chemicals as well. Asbestos has been used as an ingredient in products that need to withstand strong acid, such as heat, heat tiles. Rag Plastic containers, batteries etc.

abestos even qualify that encourages many benefits. But if this mineral into the lungs, it can cause serious disease in humans. This is harmful to human health have long known that since 1930, the disease caused by asbestos include abestos (Asbestosis), lung cancer and Mesoamerica methane Julio come. (Mesothelioma) despite being well informed about the dangers of asbestos. And efforts to control or avoid using minerals as developed countries, and some countries have tried to reduce the import ban asbestos. As well as researching other substances to substitutes.

However, the continued production and use of asbestos in a particular country is a country that has to import a large amount of asbestos.

Sources of exposure

abestos is a common mineral in the ground. In some areas there may be a substantial amount of asbestos in the mine can do this in some kind of activity associated with drilling the soil, such as iron or nickel, lead, copper mining may have asbestos dust in the air. For this reason, asbestos exposure has occurred. The environment in general and working environment with the use of this mineral in the production process.

Industry leading asbestos used as raw materials in the world, including the manufacture of cement. Industrial brake and clutch. Industrial water pipe

Health effects The accumulation in the body and eliminate the factors that made asbestos-caused disease are three reasons.

1 of asbestos into the lungs.

Two sizes of fiber (Fibers longer than 5 microns and have a diameter of less than 3 microns, with a ratio of length: width> = 3: 1).

3 durability of the fiber in the lung.

Thus, the fibers are long, thin and durable fiber that is harmful to health, however, the fibers are longer than 200 microns larger than 3 microns in diameter, and most will not have access to the alveolar lung. Often accumulates in the upper airways. And is eliminated from the body through the mucus is expelled phlegm. While the fibers are smaller than the diameter of less than 5 microns and less than 2 microns, the majority being eliminated by Alveolar macrophages.

The study Both in animals and in humans. International Agency for Research on Cancer has determined that all types of asbestos, a substance that causes cancer in humans (Class 1).

Because asbestos disease

Asbestos enters the body through the nose by inhalation. Target organ is the lung result from epidemiological studies. Especially in occupations related to asbestos. Make believe All asbestos is associated with the disease, asbestosis, lung cancer and cancer growth Allister pleura and peritoneum. (Mesothelioma)

abestos (Asbestosis) is a chronic lung disease that is specific to those exposed to asbestos only. The biological reaction between the fibers Asbestos and lung tissue Cause lung scarring The lung was destroyed and could not maintain a good has come back again.

The incubation period of this disease lasts 15-35 years, diagnosed by viewing a resume. That had been exposed to asbestos or not. Clinical signs Radiographic lung and lung function. The prognosis for patients with early stages. The disease is difficult to detect

Especially those exposed to asbestos and less than 20 years, so often found in patients with the disease when symptoms are severe. The initial symptoms of this disease is characterized by cough and wheezing with breathing out short range. And by physical examination or nails, lips and tongue may notice a dark blue and rustling sound at the base of the lungs. The radiographic lung will see a small solid dot. The performance of the lower lungs. Patients with high risk to develop a lung cancer.

Lung cancer due to asbestos

The relationship between lung cancer and asbestos exposure. Is quite complex because there are many factors involved. From an epidemiological study found. Asbestos exposure at low concentrations. (Accumulative Dose = 10-50 million fibers per cubic. Feet per year) were at risk for lung cancer.

In addition, the incidence of lung cancer was associated with fiber size. Fibers with a diameter of 0.5-2.5 microns and are 10-80 microns long be associated with cancer. While the fibers are smaller than 0.2 microns in diameter and 5-10 microns in length was not associated with cancer. The results of epidemiological studies Confirmed that smoking increases the mortality rate from the disease asbestosis grown Allister. And increase the risk of lung cancer. In people exposed to asbestos By smoking and asbestos exposure are related in a manner complementary.

(Synergistic Effect)

Julio came Mesoamerica methane (Mesothelioma) is a cancer, pleural and peritoneal. Cancer is very rare in the general population. Most are found in people exposed to asbestos. Patients with symptoms of shortness of breath, chest pain and chest pain is more severe if a deep breath. The disease spreads quickly And can be fatal within 2-3 years after symptoms appear.