How is AATD diagnosed?
Alpha-1 antitrypsin deficiency (AATD) is diagnosed through testing of a blood sample, when a person is suspected of having AATD. For example, AATD may be suspected when a physical examination reveals a barrel-shaped chest, or, when listening to the chest with a stethoscope, wheezing, crackles or decreased breath sounds are heard.
Testing for AATD, using a blood sample from the individual, is simple, quick and highly accurate.. Three types of tests are usually done on the blood sample:
Individuals who have symptoms that suggest AATD or who have a family history of AATD should consider being tested.(3)
* µM result can be derived from mg/dl by multiplying mg by .1923
protective level concept based on epidemiologic assessment of AAT levels and the risk for the development of emphysema
* Based on a study of 127 Pi*ZZ children identified in a Swedish Neonatal Screening Study (4)
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