A dangerously low oxygen level—usually below 92%—can cause shortness of breath, confusion, chest pain, or fainting. It’s often triggered by lung or heart conditions like COPD, asthma, or heart ...

Chronic obstructive pulmonary disease (COPD), a condition that affects more than 14 million U.S. adults, is marked by damage to the airways. It typically refers to emphysema and chronic bronchitis.

Scientists have discovered that people with COPD have lung cells that contain over three times as much soot-like carbon as those of smokers without the disease. These overloaded cells are larger and ...

Cells taken from the lungs of people with chronic obstructive pulmonary disease (COPD) have a larger accumulation of soot-like carbon deposits compared to cells taken from people who smoke but do not ...

Alveolar macrophages under the microscope showing deposits of black carbon. L - smaller deposits in cells from a smoker, R - larger deposits in cells from COPD patient. Cells taken from the lungs of ...