lecithin/sphingomyelin ratio

lecithin/sphingomyelin ratio
the ratio of lecithin to sphingomyelin concentration in the amniotic fluid, used to predict the degree of pulmonary maturity of the fetus and thus the risk of respiratory difficulties for the newborn. Called also L/S ratio.

Medical dictionary. 2011.

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  • lecithin — Traditional term for 1,2 diacyl sn glycero 3 phosphocholines or 3 sn phosphatidylcholines, phospholipids that on hydrolysis yield two fatty acid molecules and a molecule each of glycerophosphoric acid and choline. In some varieties of l., both… …   Medical dictionary

  • lecithin — n. one of a group of phospholipids that are important constituents of cell membranes and are involved in the metabolism of fat by the liver. An example is phosphatidylcholine. Lecithins are present in the surfactant that occurs in fetal lung… …   The new mediacal dictionary

  • ratio — An expression of the relation of one quantity to another ( e.g., of a proportion or rate). SEE ALSO: index (2), quotient. [L. r. (ration ) a reckoning, reason, fr. reor, pp. ratus, to reckon, compute] absolute terminal innervation r. the number… …   Medical dictionary

  • L/S RATIO — Lecithin/ Sphingomyelin Ratio (Medical » Laboratory) …   Abbreviations dictionary

  • L/S ratio — lecithin/sphingomyelin r …   Medical dictionary

  • L:S — lecithin:sphingomyelin [ratio] …   Medical dictionary

  • L:S — • lecithin:sphingomyelin [ratio] …   Dictionary of medical acronyms & abbreviations

  • Obstetrics — Further information: Obstetrics and gynaecology Obstetrician Occupation Names Doctor, consultant, medical specialist Activity sectors Medicine and surgery Description Education required Medical training and specialised postgr …   Wikipedia

  • Infant respiratory distress syndrome — Classification and external resources ICD 10 P22 ICD 9 769 …   Wikipedia

  • L/S — lactase/sucrase [ratio]; lecithin/sphingomyelin [ratio]; lipid/saccharide [ratio]; longitudinal section; lumbosacral …   Medical dictionary

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