Asbestosis
DEFINITION
Asbestosis (as-bes-TOE-sis) is a chronic lung disease caused by inhaling asbestos fibers. Prolonged exposure to these fibers can cause lung tissue scarring and shortness of breath. Asbestosis symptoms can range from mild to severe, and usually don’t appear until many years after continued exposure.
Asbestos is a natural mineral product that’s resistant to heat and corrosion. It was used extensively in the past in products such as insulation, cement and some floor tiles.
Most people with asbestosis acquired it on the job before the federal government began regulating the use of asbestos and asbestos products in the 1970s. Today, its handling is strictly regulated. Acquiring asbestosis is extremely unlikely if you follow your employer’s safety procedures. Treatment focuses on relieving your symptoms.
CAUSES
If you are exposed to high levels of asbestos dust over a long period of time, some of the airborne fibers can become lodged within your alveoli — the tiny sacs inside your lungs where oxygen is exchanged for carbon dioxide in your blood. The asbestos fibers irritate and scar lung tissue, causing the lungs to become stiff. This makes it difficult to breathe.
As asbestosis progresses, more and more lung tissue becomes scarred. Eventually, your lung tissue becomes so stiff that it can’t contract and expand normally.
Smoking cigarettes appears to increase the retention of asbestos fibers in the lungs, and often results in a faster progression of the disease.
SYMPTOMS
The effects of long-term exposure to asbestos typically don’t show up for 10 to 40 years after initial exposure. Asbestosis signs and symptoms can include:
- Shortness of breath
- A persistent, dry cough
- Loss of appetite with weight loss
- Fingertips and toes that appear wider and rounder than normal (clubbing)
- Chest tightness or pain
When to see a doctor
If you have a history of exposure to asbestos and you’re experiencing increasing shortness of breath, talk to your doctor about the possibility of asbestosis.
