Nasal Potential Difference Test for Cystic Fibrosis
The nasal potential difference test (nasal PD test) measures how well
salts (sodium and chloride) flow across the mucous membranes in the nose. This
type of test can be helpful when the results of a sweat test or a genetic test
are not clear.
In this test, electrodes are placed inside the nose and liquids are
run through the nose. There is also a needle placed in the forearm that
connects to a machine. Because this test can be uncomfortable, your child may
need medicine to help him or her relax before having the test.
Recommended Related to Lung Disease/Respiratory Problems
The symptoms of viral pneumonia usually are:
Enlarged lymph nodes in the neck
Coughing that usually brings up only a small amount of mucus
Bacterial pneumonia usually has these symptoms:
Cough with thick greenish or rust-colored mucus
Shortness of breath
Sharp chest pain that is worse with deep breaths
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