Mark A. Rasmus MD


Arterial Blood Gas (ABG) Test

An arterial blood gas (ABG) test measures the levels of oxygen and carbon dioxide in the blood to find out how well the lungs are working. An ABG test checks how well the lungs can move oxygen into the blood and remove carbon dioxide from the blood. As blood passes through the lungs, oxygen moves into the blood while…

Lung Function Tests

Lung function tests (also called pulmonary function tests) are done to check how well your lungs are working. The test may be done to find the cause of breathing problems, diagnose lung diseases, or find out how well treatment for a lung problem is working. There are many types of lung function tests. Spirometry…

Residual Volume (RV)

Residual volume is the amount of air that remains in a person’s lungs after fully exhaling. Doctors use tests to measure a person’s residual air volume to help check how well the lungs are functioning. It is normal to have some air remain after exhaling to keep the lungs from collapsing. Residual volume is measured by…

Lung Function Tests

Lung function tests (also called pulmonary function tests) are done to check how well your lungs are working. The test may be done to find the cause of breathing problems, diagnose lung diseases, or find out how well treatment for a lung problem is working. There are many types of lung function tests. Spirometry…

Oxygen Saturation

Oxygen saturation refers to the amount of oxygen being carried in the red blood cells, which load up with oxygen in the lungs and then transport it to the rest of the body. People who have medical conditions, such as lung disease, may not have enough oxygen in their red blood cells. Oxygen saturation can be measured by…