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Fetal lung maturity ratio

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The lecithin—sphingomyelin ratio a.

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This is especially important for premature babies trying Fetal lung maturity ratio expand their lungs after birth. Surfactant is a mixture of lipids, proteins, and glycoproteinslecithin and sphingomyelin being two of them.

Lecithin makes the surfactant mixture more effective. The lecithin—sphingomyelin ratio is a marker of fetal lung maturity.

The outward flow of pulmonary secretions from the fetal lungs into the amniotic fluid maintains the level of lecithin and sphingomyelin equally until 32—33 weeks gestation, when the lecithin concentration begins to increase significantly while sphingomyelin remains nearly the same.

As Fetal lung maturity ratio, if a sample of amniotic fluid has a higher ratio, it indicates that there is more surfactant in the lungs and the baby will have less difficulty breathing at birth. An L—S ratio of 2.

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If preterm delivery is necessary as evaluated by a biophysical profile or other tests and the L—S ratio is low, the mother may need to receive steroids such as betamethasone to hasten the fetus' surfactant production in the lungs.

An amniotic fluid sample is collected via amniocentesis and the sample is spun down in a centrifuge at rpm for 3—5 Fetal lung maturity ratio. Thin layer chromatography TLC is performed on the supernatant, which separates Fetal lung maturity ratio the components.

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Lecithin and sphingomyelin are relatively easy to identify on TLC and the predictive value of the test is good. From Wikipedia, the free encyclopedia. Cardiotocography Fetoscopy Fetal scalp blood testing Fetal scalp stimulation test.

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Fetal tissue Chorionic villus sampling Amniocentesis Blood Triple test Quad test Percutaneous umbilical cord blood sampling Apt test Kleihauer—Betke test Lung maturity Lecithin—sphingomyelin Fetal lung maturity ratio Lamellar body count Fetal fibronectin test. Nuchal scan Anomaly scan.

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Fetal movement counting Contraction stress test Nonstress test Vibroacoustic stimulation Biophysical profile Amniotic fluid index Umbilical Artery Dopplers. Fetal surgery Fetendo Podalic version External cephalic version Amnioinfusion. Artificial rupture of membranes Episiotomy Symphysiotomy Forceps in childbirth Ventouse in childbirth Odon device.

McRoberts maneuver Woods' screw maneuver Zavanelli maneuver. Hysterectomy B-Lynch suture Sengstaken—Blakemore tube. Retrieved from " https: Views Read Edit View history.

This page was last edited on 26 Januaryat By using this site, you agree to the Terms of Use and Privacy Policy. Vaginal delivery Induction Artificial rupture of membranes Episiotomy Symphysiotomy Forceps in childbirth Ventouse in childbirth Odon device. Marketed as Fetal Lung Maturity II by Abbott Laboratories (immature).

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S/A ratio. 99%. 71%.

99%. 28%. Lamellar body count.


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