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ALL ABOUT EMPHYSEMA

Chart shows damaging life threatening negative changes to lung air sacs casued by smoking smog or air pollution  

Emphysema and Smoking

Emphysema is a chronic lung disease involving damage to the lungs air sacs which happens in stages to effect breathing. There is progressive destruction in stages of alveoli and the surrounding lung tissues. With advanced emphysema the large air cysts develop where normal lung tissue used to be. Air is trapped in the lungs due to a lack of supportive tissue, which in-turn decreases blood oxygenation.

Smoking accounts for 85% of all people who pass-away attributable to emphysema, lung disease and lung cancer. Far and away cigarette smoking is the number-one cause of emphysema, lung cancer and lung failure. When exposed to cigarette smoke, the air sacs of the lungs produce defensive cells, called macrophages, which "eat" the inhaled particles. But macrophages are stimulated to release materials which can destroy the proteins that let the lungs expand and contract, called elastin and collagen.

Quitting smoking and avoiding second-hand smoke can prevent the occurrence of emphysema and at least slow the lung disease down if it's already underway. Other changes to your environment, such as avoiding smog and air pollution, may also help prevent the development of emphysema, or at least keep it from getting worse.

By now, most people are well aware that smoking causes lung cancer. Cigarettes, pipes, cigars, and chewing tobacco end-up causing more than 500,000 Americans each year to pass-away accounting for one out of every five premature demises in this country.

Lung cancer is just the first in a long list of tobacco related serious (too often they are fatal) health issues and illnesses, which include "emphysema" a very serious and often chronic medical condition. Even the skin can be damaged by smoking. Most people don't realize long-term cigarette smoking causes premature aging of skin. Many of the 4,000 chemicals in tobacco smoke also damage collagen and elastin, which are fibers giving skin its strength and elasticity. As a result, skin begins to sag and wrinkle prematurely due to smoking.

It's also widely believed smoking contributes significantly to arteriosclerosis and heart disease. There is also considerable and much researched evidence of other medical conditions attributable to smoking, which medical research and the gathering of doctors evidence is ongoing. Emphysema and Lung Cancer are being researched heavily with the latest nano-technology research but until now there are unfortunately no verified major medical break thru's to report at this time.

Emphysema & Lung Disease - Medical Overview

An emphysema related condition is Chronic Obstructive Pulmonary Disease (also known as COPD), a general term for a group of diseases which cause progressive damage to your lungs. These diseases include chronic bronchitis, asthma and emphysema. Of the approximate 20-million plus Americans with C.O.P.D. it is estimated more than 3-million have symptomatic emphysema and millions more are in the early stages of the chronic lung disease before easily recognized signs and lung disease symptoms appear.

Unlike asthma, which occurs when the muscles in your airways tighten, emphysema causes a loss of elasticity in the walls of the small air sacs in your lungs. Eventually, the walls stretch and break, creating larger, less efficient lung air sacs that aren't able to handle the normal exchange of oxygen and carbon dioxide.

When emphysema is advanced, you must work so hard to expel air from your lungs that breathing becomes difficult and breathing can consume as much as 20 percent or more of your resting energy.

Xray of lung patients lungs Unfortunately, because emphysema develops gradually in stages over the years, you may not experience typical emphysema symptoms such as shortness of breath until irreversible lung damage has already occurred. Instead of an emphysema cure, emphysema treatment focuses more on relieving emphysema symptoms and avoiding serious complications.

Signs and Symptoms

The main symptoms of emphysema are shortness of breath, breathing difficulty and reduced capacity for physical activity, both of which are likely to become worse as the disease progresses. In time, you may have trouble breathing even when lying down, and it may be especially hard to breathe during and after respiratory infections, such as the common cold, or the flu.

May 31 is world-wide no smoking day

Other signs and symptoms of emphysema include:

When you inhale, air travels to your lungs through two major airways called bronchi. Inside your lungs, the bronchi subdivide like the roots of a tree into a million smaller airways (bronchioles) that finally end in clusters of tiny air sacs (alveoli). You have about 300 million air sacs in each lung. Within the walls of the air sacs are tiny blood vessels (capillaries) where oxygen is added to your blood and carbon dioxide — a waste product of metabolism — is removed. The air sac walls also contain elastic fibers that help them expand and contract like small balloons when you breathe.

Effects of emphysema - What happens?
In emphysema, lung inflammation destroys these fragile walls of the air sacs, causing them to lose their elasticity. As a result, the bronchioles collapse, and air becomes trapped in the air sacs, which over stretches them and interferes with your ability to exhale (hyperinflation).

In time, this overstretching may cause several air sacs to rupture, forming one larger air space instead of many small ones. Because the larger, less-elastic sacs aren't able to force air completely out of your lungs when you exhale, you have to breathe harder to take in enough oxygen and to eliminate carbon dioxide.

The process works something like this: Normally, you exhale in two ways, actively and passively. When you exert yourself and need more oxygen, your chest muscles contract, forcing air out rapidly. On the other hand, when you sit quietly, your diaphragm contracts and your chest muscles expand to take air in, but your muscles don't actively contract to let the air out. Instead, the elastic tissue around your air sacs contracts, and your lungs passively shrink.

But if you have emphysema, many of these elastic fibers have been destroyed, and you must consciously force air out of your lungs. The forced exhalation compresses many of your small airways, making breathing and expelling air even more difficult.

Most common cause is smoking
Cigarette smoke is by far the most common cause of emphysema. The damage begins when tobacco smoke temporarily paralyzes the microscopic hairs (cilia) that line your bronchial tubes.

Inhaler's help emphysema patient breathing Normally, these hairs sweep irritants and germs out of your airways. But when smoke interferes with this sweeping movement, irritants remain in your bronchial tubes and infiltrate the alveoli, inflaming the tissue and eventually breaking down elastic fibers.

Protein deficiency plays a role
In a small percentage of people, emphysema results from low levels of a protein called alpha-1-antitrypsin (AAt), which protects the elastic structures in your lungs from the destructive effects of certain enzymes. A lack of AAt can lead to progressive lung damage that eventually results in emphysema.

AAt deficiency is a hereditary condition that occurs when you inherit two defective genes, one from each parent. Although severe AAt deficiency is rare, millions of people carry a single defective AAt gene. Some of these people have mild to moderate symptoms; others have no symptoms at all. Carriers are at increased risk of lung and liver problems and can pass the defect to their children.

People with two defective genes have a high likelihood of developing emphysema, usually between the ages of 30 and 40. The progression and severity of the disease are greatly exacerbated by smoking.

Experts recommend that people with early-onset emphysema — especially those who don't smoke or have other risk factors for the disease or who have a family history of AAt deficiency — be tested for the defective gene. People who are found to have a genetic predisposition for AAt deficiency may want to consider having close family members tested as well.

Screening and Diagnosis

To determine if you have emphysema, your doctor is likely to recommend certain tests, including:

When to Seek Medical Advice

See your doctor if any of the following apply to you:

These signs and symptoms don't necessarily mean you have emphysema, but they do indicate that your lungs aren't working properly and should be evaluated by your doctor as soon as possible.

Prevention

Most cases of emphysema are due to smoking. If you smoke — cigarettes, cigars or a pipe — your chance of developing emphysema is much greater than for nonsmokers. The best way to prevent emphysema is to not smoke or to stop-smoking. In addition, try to limit your exposure to secondhand smoke.

Although smoking is the most common cause of emphysema, occupational exposure to chemical fumes and dust also is a risk factor. Try wearing a dust mask for protection if you work in such an environment.

Emphysema: Does Cold Weather Make it Worse?

It may. Breathing cold, dry air causes narrowing (constriction) of the airways in some people with emphysema. This restricts airflow into and out of the lungs and makes breathing more difficult. To reduce the effects of cold air on your breathing:

Before making a permanent move from a warm climate, your doctor may suggest that you spend some time in a cold climate to see how it affects your breathing and emphysema disease.

Reprinted by StagesOfEmphysema.com with permission of The Mayo Clinic Mayo Foundation for Medical Education and Research © 1998-2008






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