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Fetal lung development can be tested by sampling the amount of surfactant in the amniotic fluid obtained via amniocentesis. [9] Several tests are available, including the lecithin-sphingomyelin ratio (" L/S ratio "), the presence of phosphatidylglycerol (PG), and the surfactant/albumin (S/A) ratio . [ 9 ]
An amniocentesis is a procedure in which a sample of amniotic fluid is aspirated using a needle that is inserted into the abdomen guided by ultrasound. [1] The sample is then tested, and can help doctors diagnose genetic disorders, birth defects, or other fetal health problems.
In order to listen to the lungs from the back the patient is asked to move their arms forward to prevent the scapulae (shoulder blades) from obstructing the upper lung fields. These fields are intended to correlate with the lung lobes and are thus tested on the anterior (front) and posterior (back) chest walls.
Pulmonary function testing (PFT) is a complete evaluation of the respiratory system including patient history, physical examinations, and tests of pulmonary function. The primary purpose of pulmonary function testing is to identify the severity of pulmonary impairment. [1]
Amniotic fluid is removed from the mother by an amniocentesis procedure, where a long needle is inserted through the abdomen into the amniotic sac, using ultrasound guidance such that the fetus is not harmed. Amniocentesis is a low risk procedure, with risk of pregnancy loss between 1 in 1,500 – 1 in 700 procedures.
Expand on indications for amniocentesis for genetic diagnosis purposes; Elaborate on who the procedure is offered to and why and the different scenarios a pregnant person may receive the procedure; Compare and contrast alternatives to amniocentesis for genetic diagnosis and pros/cons of each in relation to amniocentesis; Lung development
PUBS provides a means of rapid chromosome analysis and is useful when information cannot be obtained through amniocentesis, chorionic villus sampling, or ultrasound (or if the results of these tests were inconclusive); this test carries a significant risk of complication and is typically reserved for pregnancies determined to be at high risk ...
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