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The spirometry and plethysmography test measures flows and lung volumes. Both tests require a level of cooperation that is usually achievable in children 6 years and older. However, new techniques and equipment are available to perform these tests in infants and toddlers. The testing is done under sedation to ensure passive cooperation. Testing takes approximately 90–120 minutes, but can give results with similar accuracy as in older children.
Learn more about the Infant Pulmonary Function Testing Patient Procedure.
In many cases, a patient is diagnosed with asthma using his or her symptoms and response to medication. Usually, lung function is normal when the patient is asymptomatic. A provocation test is designed to induce asthma symptoms, using either an inhaled chemical, such as methacholine, or other stimuli, such as cold air and exercise. The stimulus is usually provided in increasing amounts, with spirometry performed after each step. If a significant decrease in lung function occurs, the patient is then given a bronchodilator medicine. This testing frequently lasts up to 2 hours and requires the patient to perform spirometry consistently and repeatedly.
Commercial airplanes are usually pressurized to approximately 8,000 feet while flying at 30,000 feet. The barometric pressure results in a lower amount of oxygen and can cause decreased oxygen levels in the blood. Patients with lung disease may require additional oxygen while flying. The High Altitude Simulation Test can determine the amount of extra oxygen needed during air travel. The patient breathes a gas mixture with a decreased amount of oxygen to simulate the amount that would be present while flying. Additional oxygen is administered during the test to determine the amount necessary to maintain normal blood oxygen levels. Testing takes approximately one hour.
Some diseases that affect very small airways are difficult to detect because they may be “patchy” or affect different airways to different degrees. For the single breath oxygen test, patients inhale one big breath of 100% oxygen, and then slowly exhale. The amount of nitrogen (which is 80% of air in the environment) is measured, which determines of how evenly the smaller airways empty. This testing requires cooperation that is usually achievable in children 6 years and older. Testing takes approximately 20 minutes.
Children's Hospital's main campus is located in the Lawrenceville neighborhood. Our main hospital address is:
UPMC Children’s Hospital of Pittsburgh
One Children’s Hospital Way
4401 Penn Ave.
Pittsburgh, PA 15224
In addition to the main hospital, Children's has many convenient locations in other neighborhoods throughout the greater Pittsburgh region.
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Interested in giving to Children's Hospital? Visit Children's Hospital of Pittsburgh Foundation's website to make a donation online.