This video was designed to educate parents and caregivers by showing actual patients receiving treatment. Our intent with this video is to help you, and your child if you chose to show it to them, understand what will happen with your child has this procedure.
The machine that performs the PFT is sometimes a confined space with clear walls and a seat inside. Your child will be asked wear a nose plug and blow into a plastic mouthpiece connected to the machine. The machine measures the amount of air breathed in and the force of the air breathed out. Normal values are based on your age, height, ethnicity, and sex. Normal results are expressed as a percentage. Normal value ranges may vary slightly among different laboratories, based on slightly different ways to determine normal values.
Talk to your provider about the meaning of your specific test results. Some lung diseases such as emphysema, asthma, chronic bronchitis, and infections can make the lungs contain too much air and take longer to empty. These lung diseases are called obstructive lung disorders. Other lung diseases make the lungs scarred and smaller so that they contain too little air and are poor at transferring oxygen into the blood.
Examples of these types of illnesses include:. Muscular weakness can also cause abnormal test results, even if the lungs are normal, that is, similar to the diseases that cause smaller lungs. There is a small risk of collapsed lung pneumothorax in people with a certain type of lung disease. The test should not be given to a person who has experienced a recent heart attack, has certain other types of heart disease, or has had a recent collapsed lung.
Pulmonary function testing. Murray and Nadel's Textbook of Respiratory Medicine. Philadelphia, PA: Elsevier Saunders; chap Putnam JB. Lung, chest wall, pleura, and mediastinum. Philadelphia, PA: Elsevier; chap Scanlon PD. Respiratory function: mechanisms and testing. Goldman-Cecil Medicine. Harron Jr. The tests are repeated several times to make sure the results are accurate. When performing the test, keep the following in mind:. The exercise test will be performed on a bike or treadmill and you should plan to wear loose fitting, comfortable clothing and athletic shoes.
You will be attached to a heart monitor and blood pressure machine to monitor your vital signs during the test. You will be given additional instructions about how to prepare for this test at the time it is ordered. After the test, you can return to your normal daily activities. Normal values are calculated based on age, height and gender.
If a value is abnormal, a lung problem may be present. Sometimes a patient with normal lungs may have a breathing test value that is abnormal. Your doctor will explain what your test results mean. You need to understand and follow directions to perform a lung function test. Exercise testing should not be done in those who have had:.
Special steps are taken to avoid spreading germs between patients who use the same lung function equipment. The technician will change mouthpieces and other equipment between patients. Special filters are also used to prevent the spread of germs. Be sure to ask questions before the test is started. This November your donation goes even further to improve lung health and defeat lung cancer.
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