Skip to Content
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.
This test is not used very often because it can be
difficult to do and because it is not available in many places.
ByHealthwise StaffPrimary Medical ReviewerJohn Pope, MD - PediatricsSpecialist Medical ReviewerSusanna McColley, MD - Pediatric Pulmonology
Current as ofAugust 21, 2015
Current as of:
August 21, 2015
John Pope, MD - Pediatrics & Susanna McColley, MD - Pediatric Pulmonology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
© Copyright 2016 Rush-Copley Medical Center • 2000 Ogden Avenue; Aurora, IL 60504
Main: 630-978-6200 • Physician Referral & Information: 630-978-6700 or 866-4COPLEY (866-426-7539)