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Lung Disease & Respiratory Health Center

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Obstructive and Restrictive Lung Disease

Doctors may classify lung conditions as obstructive lung disease or restrictive lung disease. Obstructive lung diseases include conditions that make it hard to exhale all the air in the lungs. People with restrictive lung disease have difficulty fully expanding their lungs with air.

Obstructive and restrictive lung disease share the same main symptom: shortness of breath with exertion.

Recommended Related to Lung Disease/Respiratory Problems

LAM Lung Disease (Lymphangioleiomyomatosis)

LAM lung disease (lymphangioleiomyomatosis) is a rare lung disease that tends to affect women of childbearing age. In LAM lung disease, muscle cells that line the lungs' airways and blood vessels begin to multiply abnormally. These muscle cells spread into areas of the lung where they don't belong. The air sacs in the lung also swell and form small pockets called cysts. As the cysts develop throughout the lungs, LAM causes breathing problems similar to emphysema. The muscle cells can spread...

Read the LAM Lung Disease (Lymphangioleiomyomatosis) article > >

What Is Obstructive Lung Disease?

People with obstructive lung disease have shortness of breath due to difficulty exhaling all the air from the lungs. Because of damage to the lungs or narrowing of the airways inside the lungs, exhaled air comes out more slowly than normal. At the end of a full exhalation, an abnormally high amount of air may still linger in the lungs.

The most common causes of obstructive lung disease are:

Obstructive lung disease makes it harder to breathe, especially during increased activity or exertion. As the rate of breathing increases, there is less time to breathe all the air out before the next inhalation.

What Is Restrictive Lung Disease?

People with restrictive lung disease cannot fully fill their lungs with air. Their lungs are restricted from fully expanding.

Restrictive lung disease most often results from a condition causing stiffness in the lungs themselves. In other cases, stiffness of the chest wall, weak muscles, or damaged nerves may cause the restriction in lung expansion.

Some conditions causing restrictive lung disease are:

 

Diagnosis of Obstructive Lung Disease and Restrictive Lung Disease

Most commonly, people with obstructive or restrictive lung disease seek a doctor because they feel short of breath.

Restrictive and obstructive lung diseases are identified using pulmonary function tests. In pulmonary function testing, a person blows air forcefully through a mouthpiece. As the person performs various breathing maneuvers, a machine records the volume and flow of air through the lungs. Pulmonary function testing can identify the presence of obstructive lung disease or restrictive lung disease, as well as their severity.

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