The lecithin/sphingomyelin (L/S) ratio is measured for assessing maturity of:
Correct Answer: Lung
Description: The lecithin/sphingomyelin (L/S) ratio for assessment of fetal pulmonary maturity. The test depends on outward flow of pulmonary secretions from the lungs into the amniotic fluid, thereby changing the phospholipid composition of the latter and permitting measurement of the L/S ratio in a sample of amniotic fluid. In the absence of complications, the ratio of these 2 components reaches 2.0 at approximately 35 weeks. The presence of blood or meconium may interfere with test interpretation. Ref: Mehta S.H., Sokol R.J. (2013). Chapter 12. Assessment of At-Risk Pregnancy. In A.H. DeCherney, L. Nathan, N. Laufer, A.S. Roman (Eds), CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 11e.
Category:
Gynaecology & Obstetrics
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now