Karnataka PGET Obstetrics MCQ Answer 5
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Predicting whether a premature infant will be at risk of RDS can help decide whether to proceed with delivery or wait. This requires testing amniotic fluid (which is in contact with the lining of the fetal bronchopulmonary tree) for evidence of surfactant. Lecithin is phosphatidylcholine, the phospholipid that represents the bulk of surfactant. Surfactant consists primarily of the phospholipid phosphatidylcholine (also called lecithin).Sphingomyelin is a lipid unassociated with fetal lung maturity. The L/S ratio uses sphingomyelin as an internal control
L/S ratio
- Ideal # 2/1 = mature lungs
- 1.5/1= moderate RDS
- Less than 1= severe RDS
Tags: MCQ, Obstetrics, Fetal Lung maturity
Category: Karnataka PGET 2007 MCQs
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