Current Perspectives in Assessment of Fetal Pulmonary Surfactant Status with Ammiotic Fluid

References

• Comroe J. H. Premature science and immature lungs. I to III. Retrospectroscope, J. H. Comroe. Von Gehr Press, Menlo Park, CA 1977; 140
   Google Scholar
• Macklin C. C. The pulmonary alveolar mucoid film and the pneumocytes. Lancet 1954; 1: 1099
   Web of Science ®Google Scholar
• Pattle R. E. Properties, function, and origin of the alveolar lining layer. Nature (London) 1955; 175: 1125
   PubMed Web of Science ®Google Scholar
• Guyton A. C., Moffatt D. S., Adair T. H. Role of alveolar surface tension in transepithelial movement of fluid. Pulmonary Surfactant, B. Robertson, Golde L. M. G. Va, J. J. Batenburg. Elsevier, Amsterdam 1984; chap. 5
   Google Scholar
• Gitlin D., Craig J. M. The nature of the hyaline membrane in asphyxia of the newborn. Pediatrics 1956; 17: 64
   PubMed Web of Science ®Google Scholar
• Robertson B. Pathology of neonatal surfactant deficiency. Perspect. Pediatr. Pathol. 1987; 11: 6
   PubMedGoogle Scholar
• Robertson B. Pathology and pathophysiology of neonatal surfactant deficiency (“respiratory distress syndrome”, “hyaline membrane disease”). Pulmonary Surfactant, B. Robertson, Golde L. M. G. Va, J. J. Batenburg. Elsevier, Amsterdam 1984; chap. 13
   Google Scholar
• Clements J. A., Brown E. S., Johnson R. P. Pulmonary surface tension and the mucus lining of the lungs: some theoretical considerations. J. Appl. Physiol. 1958; 12: 262
   PubMed Web of Science ®Google Scholar
• Avery M. E., Mead J. Surface properties in relation to atelectasis and hyaline membrane disease. Am. J. Dis. Child. 1959; 97: 517
   PubMedGoogle Scholar
• Notter R. H., Taubold R., Mavis R. D. Hysteresis in saturated phospholipid films and its potential relevance for lung surfactant function in vivo. Exp. Lung Res. 1982; 3: 109
   PubMed Web of Science ®Google Scholar
• Klaus M. H., Clements J. A., Havel R. J. Composition of surface-active material isolated from beef lung. Proc. Natl. Acad. Sci. U.S.A. 1961; 47: 1858
   PubMed Web of Science ®Google Scholar
• Reynolds S. R. M. A source of amniotic fluid in the lamb: the nasopharyngeal and buccal cavities. Nature (London) 1953; 172: 307
   Google Scholar
• Scarpelli E. M. The lung, tracheal fluid, and lipid metabolism of the fetus. Pediatrics 1967; 40: 951
   PubMed Web of Science ®Google Scholar
• Biezenski J. J., Pomerance W., Goodman J. Studies on the origin of amniotic fluid lipids. I. Normal composition. Am. J. Obstet. Gynecol. 1968; 102: 853
   PubMed Web of Science ®Google Scholar
• Graven S. N. Phospholipids in human and monkey amniotic fluid. Pediatr. Res. 1968; 2: 318
   Web of Science ®Google Scholar
• Nelson G. H. Amniotic fluid phospholipid patterns in normal and abnormal pregnancies. Am. J. Obstet. Gynecol. 1969; 105: 1072
   PubMed Web of Science ®Google Scholar
• Gluck L., Kulovich M. V., Borer R. C., Brenner R. C., Anderson G. G., Spellacy W. N. Diagnosis of the respiratory distress syndrome by amniocentesis. Am. J. Obstet. Gynecol. 1971; 109: 440
   PubMed Web of Science ®Google Scholar
• Borer R. C., Gluck L., Freeman R. K., Kulovich M. V. Prenatal prediction of the respiratory distress syndrome (RDS). Pediatr. Res. 1971; 5: 655
   Web of Science ®Google Scholar
• Nelson G. H. Relationship between amniotic fluid lecithin concentration and respiratory distress syndrome. Am. J. Obstet. Gynecol. 1972; 112: 827
   PubMed Web of Science ®Google Scholar
• Bhagwanani S. G., Fahmy D., Turnbull A. C. Prediction of neonatal respiratory distress by estimation of amniotic-fluid lecithin. Lancet 1972; 1: 159
   PubMedGoogle Scholar
• Clements J. A., Platzker A. C. G., Tierney D. F., Hobel C. J., Creasy R. K., Margolis A. J., Thibeault D. W., Tooley W. H., Oh W. Assessment of the risk of the respiratory-distress syndrome by a rapid test for surfactant in amniotic fluid. N. Engl. J. Med. 1972; 286: 1077
   PubMed Web of Science ®Google Scholar
• Nelson G. H., Lawson S. W. Determination of amniotic fluid total phospholipid phosphorus as a test for fetal lung maturity. Am. J. Obstet. Gynecol. 1973; 115: 933
   PubMedGoogle Scholar
• Falconer G. F., Hodge J. S., Gadd R. L. Influence of amniotic fluid volume on lecithin estimation in prediction of respiratory distress. Br. Med. J. 1973; 2: 689
   Google Scholar
• Gluck L., Kulovich M. V. Lechithin/sphingomyeUn ratios in amniotic fluid in normal and abnormal pregnancy. Am. J. Obstet. Gynecol. 1973; 115: 539
   PubMed Web of Science ®Google Scholar
• Gluck L., Motoyama E. K., Smits H. L., Kulovich M. V. The biochemical development of surface activity in mammalian lung. I. The surface-active phospholipids: the separation and distribution of surface-active lecithin in the lung of the developing rabbit fetus. Pediatr. Res. 1967; 1: 237
   PubMedGoogle Scholar
• Gluck L., Landowne R. A., Kulovich M. V. Biochemical development of surface activity in mammalian lung. III. Structural changes in lung lecithin during development of the rabbit fetus and newborn. Pediatr. Res. 1970; 4: 352
   PubMed Web of Science ®Google Scholar
• Watkins J. C. The surface properties of pure phospholipids in relation to those of lung extracts. Biochem. Biophys. Acta 1967; 152: 293
   Google Scholar
• Roux J. F., Nakamura J., Frosolono M. Fatty acid composition and concentration of lecithin in the acetone fraction of amniotic fluid phospholipids. Am. J. Obstet. Gynecol. 1974; 119: 838
   PubMedGoogle Scholar
• Lindback T., Frantz T., Skjaeraasen J., Graven S. Phospholipids in amniotic fluid. I. Relationship of phospholipid concentrations to gestation, maternal disease, and fetal outcome. Am. J. Obstet. Gynecol. 1974; 53: 219
   Google Scholar
• Frantz T., Lindback T., Skjaeraasen J., Graven S. Phospholipids in amniotic fluid. II. Lecithin fatty acid patterns related to gestation, maternal disease, and fetal outcome. Acta Obstet. Gynecol. Scand. 1975; 54: 33
   PubMed Web of Science ®Google Scholar
• Mason R. J., Nellenbogen J., Clements J. A. Isolation of disaturated phosphatidylcholine with osmium tetroxide. J. Lipid Res. 1976; 17: 281
   PubMed Web of Science ®Google Scholar
• Kulovich M. V., Hallman M. B., Gluck L. The lung profile. I. Normal pregnancy. Am. J. Obstet. Gynecol. 1979; 135: 57
   PubMed Web of Science ®Google Scholar
• Torday J., Carson L., Lawson E. E. Saturated phosphatidylcholine in amniotic fluid and prediction of the respiratory-distress syndrome. N. Engl. J. Med. 1979; 301: 1013
   PubMed Web of Science ®Google Scholar
• Hoevet S. P., Viswanathan C. V., Lundberg W. O. Fractionation of a natural mixture of alkenyl acyl- and diacyl choline phosphatides by argentation adsorption thin-layer chromatography. J. Chromatogr. 1968; 34: 195
   Google Scholar
• Gluck L., Kulovich M. V., Borer R. C., Keidel W. N. The interpretation and significance of the lecithin/sphingomyelin ratio in amniotic fluid. Am. J. Obstet. Gynecol. 1974; 120: 142
   PubMed Web of Science ®Google Scholar
• Sarkozi L., Kovacs H. N., Fox H. A., Kerenyi T. Modified method for estimating the phos-phatidylcholine:sphingomyelin ratio in amniotic fluid, and its use in the assessment of fetal lung maturity. Clin. Chem. 1972; 18: 956
   PubMedGoogle Scholar
• Jackson R. W., Anderson G. D., Held B. Amniotic fluid phospholipids and fetal lung maturity. I. Assessment of various methods of determining lecithin and sphingomyelin. Am. J. Obstet. Gynecol. 1975; 121: 1095
   Google Scholar
• Hobson D. W., Spillman T., Cotton D. B. Effect of acetone precipitation on the clinical prediction of respiratory distress syndrome when utilizing amniotic fluid lecithin/sphingomyelin ratios. Am. J. Obstet. Gynecol. 1986; 154: 1023
   Google Scholar
• Tsai M. Y., Marshall J. G. Phosphatidylglycerol in 261 samples of amniotic fluid from normal and diabetic pregnancies, as measured by one-dimensional thin-layer chromatography. Clin. Chem. 1979; 25: 682
   PubMed Web of Science ®Google Scholar
• Kohl H. H., Telander D. H., Roberts E. C., Elliot H. C. Modified method for estimating the lecithin/sphingomyelin ratio in amniotic fluid. Clin. Chem. 1978; 24: 174
   Google Scholar
• Verder H., Clausen J. Idiopathic respiratory distress syndrome and the phospholipids in the amniotic fluid. Clin. Chem. Acta 1974; 51: 271
   PubMed Web of Science ®Google Scholar
• Mallikarjuneswara V. R. Lecithin-sphingomyelin ratio in amniotic fluid, as assessed by a modified thin-layer chromatographic method in which a commercial pre-coated plate is used. Clin. Chem. 1975; 21: 260
   Google Scholar
• Oulton M. The role of centrifugation in the measurement of surfactant in amniotic fluid. Am. J. Obstet. Gynecol. 1979; 135: 337
   PubMedGoogle Scholar
• Shelley S. A., Balis J. U., Paciga J. E., Espinoza C. G., Richman A. V. Biochemical composition of adult human lung surfactant. Lung 1982; 160: 195
   PubMed Web of Science ®Google Scholar
• Post M., Batenburg J. J., Schuurmans E. A. J. M., Laros C. D., Van Golde L. M. J. Lamellar bodies isolated from adult human lung tissue. Exp. Lung Res. 1982; 3: 17
   PubMed Web of Science ®Google Scholar
• Hallman M., Gluck L. Phosphatidylglycerol in lung surfactant. III. Possible modifier of surfactant function. J. Lipid Res. 1976; 17: 257
   PubMed Web of Science ®Google Scholar
• Hallman M., Kulovich M., Kirkpatrick E., Sugarman R. G., Gluck L. Phosphatidylinositol and phosphatidylglycerol in amniotic fluid: indices of lung maturity. Am. J. Obstet. Gynecol. 1976; 125: 613
   PubMed Web of Science ®Google Scholar
• Bangham A. D., Morley C. J., Phillips M. C. The physical properties of an effective lung surfactant. Biochem. Biophys. Acta 1979; 573: 552
   PubMed Web of Science ®Google Scholar
• Hallman M., Enhorning G., Possmayer F. Composition and surface activity of normal and phosphatidylglycerol-deficient lung surfactant. Pediatr. Res. 1985; 19: 286
   PubMed Web of Science ®Google Scholar
• Gluck L., Kulovich M. V., Borer R. C. Estimates of fetal lung maturity. Clin. Perinatol. 1974; 1: 1
   Google Scholar
• Simon R. G. Lecithin/sphingomyelin ratio in respiratory distress syndrome [letter]. Clin. Chem. 1972; 18: 315
   Google Scholar
• St Clair R. W. Lecithin/sphingomyelin ratio in respiratory distress syndrome [reply]. Clin. Chem. 1972; 18: 315
   Google Scholar
• Duck-Chong C. G., Brown L. M. Is the L/S ratio really a lecithin/sphingomyelin ratio?. Ann. Clin. Biochem. 1979; 16: 184
   Google Scholar
• Huang N. H., Besch N. F., Besch P. K., Hinkley C. M. A modified Gluck method for the lecithin/sphingomyelin ratio with increased specificity and validity. Clin. Chem. 1981; 27: 1774
   Google Scholar
• Touchstone J. C., Chen J. C., Beaver K. M. Improved separation of phospholipids in thin layer chromatography. J. Chromatogr. 1980; 15: 61
   Google Scholar
• Spillman T., Cotton D. B., Lynn S. C., Bretaudiere J.-P. Removal of a component interfering with phosphatidylglycerol estimation in the “Helena” system for amniotic fluid phosphlipids. Clin. Chem. 1984; 30: 737
   Google Scholar
• Tulley R. T., Whittington N. B., Worthy M. J. Possible interference with the Helena laboratories' method for phosphatidylglycerol. Clin. Chem. 1983; 29: 404
   Google Scholar
• Cotton D. B., Spillman T. False phosphatidylglycerol with Helena fetal-tek 200 thin-layer chromatography method for fetal lung maturity [letter]. Am. J. Obstet. Gynecol. 1985; 151: 417
   PubMedGoogle Scholar
• Spillman T., Cotton D. B., Golunski E. Detection frequency by thin-layer chromatography of phosphatidylglycerol in amniotic fluid with clinically functional pulmonary surfactant. Clin. Chem. 1988; 34: 1976
   PubMed Web of Science ®Google Scholar
• Body D. R., Gray G. M. The isolation and characterization of phosphatidylglycerol and a structural isomer from pig lung. Chem. Phys. Lipids 1967; 1: 254
   Google Scholar
• Robbins M. H., Burgess T. E., Myrtle J. F. Phospholipids in amniotic fluid: a quantitative procedure for L/S, PG/S, and PL/S by one dimensional thin layer chromatography. Clin. Chem. 1984; 30: 994
   Google Scholar
• Gebhardt D. O. E., Dubbeldam A. Relation between lecithin/sphingomyelin ratios of amniotic fluid and method of determination. Lancet 1973; 1: 726
   Google Scholar
• Spillman T., Cotton D. B., Lynn S. C., Bretaudiere J.-P. Influence of phospholipid saturation on classical thin-layer chromatographic detection methods and its effect on amniotic fluid lecithin/sphingomyelin ratio determinations. Clin. Chem. 1983; 29: 250
   Google Scholar
• Olson E. B., Graven S. N. Comparison of visualization methods used to measure the lecithin/ sphingomyelin ratio in amniotic fluid. Clin. Chem. 1974; 20: 1408
   Google Scholar
• Touchstone J. C., Levin S. S., Dobbins L. M., Beers P. C., Gabbe S. G. (3-sn-phosphatidyl)cholines (lecithins) in amniotic fluid. Clin. Chem. 1983; 29: 1951
   Google Scholar
• Farrell P. M., Engle M. J., Curet L. B., Perelman R. H., Morrison J. C. Saturated phospholipids in amniotic fluid of normal and diabetic pregnancies. Obstet. Gynecol. 1984; 64: 77
   PubMed Web of Science ®Google Scholar
• Spillman T., Cotton D. B., Gonik B. Effect of differences in saturation sensitivity of phospholipid stains on clinical predictivity of L/S ratios [short communication]. Clin. Chem. Acta 1985; 152: 199
   Google Scholar
• Painter P., Evans J., Semmer J., Traylor T., Cope J., LeMarr F. Measurement of amniotic fluid delta L/S ratio [abstract]. Clin. Chem. 1985; 31: 951
   Google Scholar
• Van Golde L. M. G. Synthesis of surfactant lipids in the adult lung. Annu. Rev. Physiol. 1985; 47: 765
   PubMed Web of Science ®Google Scholar
• Batenburg J. J., Van Golde L. M. J. Formation of pulmonary surfactant in whole lung and in isolated type II alveolar cells. Rev. Perinat. Med. 1978; 3: 73
   Google Scholar
• Ohno K., Akino T., Fujiwara T. Phospholipid metabolism in perinatal lung. Rev. Perinat. Med. 1978; 2: 227
   Google Scholar
• Fewster M. E., Burns B. J., Mead J. F. Quantitative densitometry thin-layer chromatography of lipids using copper acetate reagent. J. Chromatogr. 1969; 43: 120
   PubMed Web of Science ®Google Scholar
• Mueller R. G. Effect of charring temperature on observed L/S ratio. Clin. Chem. Acta 1982; 122: 79
   Google Scholar
• Brown L. M., Duck-Chong C. G. Methods of evaluating fetal lung maturity. Crit. Rev. Clin. Lab. Sci. 1982; 16: 85
   Google Scholar
• Painter P. C. Simultaneous measurement of lecithin, sphingomyelin, phosphatidylglycerol, phosphatidylethanolamine, and phosphatidylserine in amniotic fluid. Clin. Chem. 1980; 26: 1147
   Google Scholar
• Abrams M. E. Isolation and quantitative estimation of pulmonary surface-active lipoprotein. J. Appl. Physiol. 1966; 21: 718
   PubMed Web of Science ®Google Scholar
• Williams M. C. Conversion of lamellar body membranes into tubular myelin in alveoli of fetal rat lungs. J. Cell Biol. 1977; 72: 260
   PubMed Web of Science ®Google Scholar
• Stratton C. J. Morphology of surfactant producing cells and of the alveolar lining layer. Pulmonary Surfactant, B. Robertson, L. M. G. Van Golde, J. J. Batenburg. Elsevier, Amsterdam 1984; chap. 3
   Google Scholar
• Lynn W. S. Alveolyn-structure and source: a review. Exp. Lung Res. 1984; 6: 191
   PubMed Web of Science ®Google Scholar
• Ng V. L., Herndon V. L., Mendelson C. R., Snyder J. M. Characterization of rabbit surfactant-associated proteins. Biochem. Biophys. Acta 1983; 754: 218
   PubMed Web of Science ®Google Scholar
• Floras J., Phelps D S., Taeusch H. W. Biosynthesis and in vitro translation of the major surfactant-associated protein from human lung. J. Biol. Chem. 1985; 260: 495
   Google Scholar
• Katyal S. L., Singh G. Structural and ontogenetic relationships of rat lung surfactant apoproteins. Exp. Lung Res. 1984; 6: 175
   PubMed Web of Science ®Google Scholar
• King R. J. Lipid-apoprotein interactions in surfactant studied by reassembly. Exp. Lung Res. 1984; 6: 237
   PubMed Web of Science ®Google Scholar
• Hawgood S., Benson B. J., Schilling J., Damm D., Clements J. A., White R. T. Nucleotide and amino acid sequences of pulmonary surfactant protein SP 18 and evidence for cooperation between SP 18 and SP 28-36 in surfactant lipid adsorption. Proc. Natl. Acad. Sci. U.S.A. 1987; 84: 66
   PubMed Web of Science ®Google Scholar
• Claypool W. D., Wang D. L., Chander A., Fisher A. B. “Hydrophobic” surfactant apoproteins and augmentation of phospholipid recycling. Exp. Lung Res. 1984; 6: 215
   PubMed Web of Science ®Google Scholar
• Fujiwara T., Maeta H., Chida S., Morita T., Watabe Y., Abe T. Artificial surfactant therapy in hyaline-membrane disease. Lancet 1980; 1: 55
   PubMed Web of Science ®Google Scholar
• Notter R. H., Shapiro D. L. Lung surfactants for replacement therapy: biochemical, biophysical, and clinical aspects. Clin. Perinatal. 1987; 14: 433
   Google Scholar
• Fujiwara T. Surfactant replacement in neonatal RDS. Pulmonary Surfactant, B. Robertson, L. M. G. Van Golde, J. J. Batenburg. Elsevier, Amsterdam 1984; chap. 17
   Google Scholar
• Hallman M., Teramo K., Ylikorkala O., Merritt T. A. Natural surfactant substitution in respiratory distress syndrome. J. Perinat. Med. 1987; 15: 463
   Google Scholar
• Cherayil G. D., Wilkinson E. J., Borkowf H. I. Amniotic fluid lecitbin/sphingomyelin ratio changes related to centrifugal force. Obstet. Gynecol. 1977; 50: 682
   PubMed Web of Science ®Google Scholar
• Frosolono M. F. Surface active material in human amniotic fluid. Am. J. Obstet. Gynecol. 1978; 130: 562
   Google Scholar
• Duck-Chong C. G., Gupta J. M., Storey G. N. B., Houghton C. R. S. Lamellar body phospholipid content of amniotic fluid and L/S ratio compared in assessing fetal lung maturity. Clin. Chem. 1981; 27: 1851
   Google Scholar
• Bent A. E., Gray J. H., Luther E. R., Outon M., Peddle L. J. Phosphatidylglycerol determination on amniotic fluid 10,000Xg pellet in the prediction of fetal lung maturity. Am. J. Obstet. Gynecol. 1981; 139: 259
   Google Scholar
• Oulton M. The role of centrifugation in the measurement of surfactant in amniotic fluid. Am. J. Obstet. Gynecol. 1982; 142: 684
   PubMedGoogle Scholar
• Buhi W. C., Spellacy W. N. Effects of blood or meconium on the determination of the amniotic fluid lecithin/sphingomyelin ratio. Am. J. Obstet. Gynecol. 1975; 121: 321
   PubMedGoogle Scholar
• Badham L. P., Worth H. G. J. Critical assessment of phospholipid measurement in amniotic fluid. Clin. Chem. 1975; 21: 1441
   PubMed Web of Science ®Google Scholar
• Cotton D. B., Spillman T., Bretaudiere J.-P. Effect of blood contamination on lecithin to sphingomyelin ratio in amniotic fluid by different detection methods. Clin. Chem. Acta 1984; 137: 299
   PubMed Web of Science ®Google Scholar
• Strassner S. H., Golde S. H., Mosley G. H., Piatt L. D. Effect of blood in amniotic fluid on the detection of phosphatidylglycerol. Am. J. Obstet. Gynecol. 1980; 138: 697
   Google Scholar
• Kynast G., Heinze T., Saling E. A new test-combination for the enzymatic determination of fetal lung maturity. J. Perinat. Med. 1981; 9: 101
   PubMedGoogle Scholar
• Yambao T. J., Tawwater B., Chuachingco J., Canillo A., Schwartz D. S. Effect of meconium on the detection of phosphatidylglycerol. Am. J. Obstet. Gynecol. 1984; 150: 426
   PubMed Web of Science ®Google Scholar
• Cotton D. B., Hill L. M., Strassner H. T., Piatt L. D., Ledger W. J. Use of amniocentesis in preterm gestation with ruptured membranes. Obstet. Gynecol. 1984; 63: 38
   PubMed Web of Science ®Google Scholar
• Phillippe M., Acker D., Torday J., SchifT I., Frigoletto F. D. The effects of vaginal contamination on two pulmonary phospholipid assays. J. Reprod. Med. 1982; 27: 283
   PubMedGoogle Scholar
• Stedman C. M., Crawford S., Staten E., Cherny W. B. Management of preterm premature rupture of membranes: assessing amniotic fluid in the vagina for phosphatidylglycerol. Am. J. Obstet. Gynecol. 1981; 140: 43
   Google Scholar
• Brame R. G., MacKenna J. Vaginal pool phospholipids in the management of premature rupture of membranes. Am. J. Obstet. Gynecol. 1983; 145: 992
   Google Scholar
• Golde S. H. Use of obstetric perineal pads in collection of amniotic fluid in patients with rupture of membranes. Am. J. Obstet. Gynecol. 1983; 146: 710
   Google Scholar
• Shaver D. C., Spinnato J. A., Whybrew D., Williams W. K., Anderson G. D. Comparison of phospholipids in vaginal and amniocentesis specimens of patients with premature rupture of membranes. Am. J. Obstet. Gynecol. 1987; 156: 454
   Google Scholar
• Schumacher R. E., Parisi V. M., Steady H. M., Tsao F. H. C. Bacteria causing false positive test for phosphatidylglycerol in amniotic fluid. Am. J. Obstet. Gynecol. 1985; 151: 1067
   PubMed Web of Science ®Google Scholar
• Pastorek J. G., Letellier R. L., Gebbia K. Production of a phosphatidylglycerol-like substance by genital flora bacteria. Am. J. Obstet. Gynecol. 1988; 159: 199
   Google Scholar
• Romem Y., Golde S. H., Mosley G. M., Paul R. H. Influence of seminal ejaculate on the amniotic fluid phospholipid lung profile. Am. J. Obstet. Gynecol. 1984; 149: 89
   Google Scholar
• Freer D. E., Statland B. E. Measurement of amniotic fluid surfactant. Clin. Chem. 1981; 27: 1629
   Google Scholar
• Kriegisteiner H. P., Lohninger A., Riedl R., El Kalak H., Kaiser E. The assessment of foetal lung maturity by chemical analysis of amniotic fluid. J. Clin. Chem. Clin. Biochem. 1986; 24: 705
   Google Scholar
• Hallman M. Antenatal diagnosis of lung maturity. Pulmonary Surfactant, B. Robertson, L. M. G. Van Holde, J. J. Batenburg. Elsevier, Amsterdam 1984; chap. 14
   Google Scholar
• Batenburg J. J. Biosynthesis and secretion of pulmonary surfactant. Pulmonary Surfactant, B. Robertson, L. M. G. Van Golde, J. J. Batenburg. Elsevier, Amsterdam 1984; chap. 9
   Google Scholar
• Voelker D. R., Synder F. Subcellular site and mechanism of synthesis of disaturated phosphatidylcholine in alveolar type II cell adenomas. J. Biol. Chem. 1979; 254: 8628
   PubMed Web of Science ®Google Scholar
• Smith B. T. Pulmonary surfactant during fetal development and neonatal adaptation: hormonal control. Pulmonary Surfactant, B. Robertson, L. M. G. Van Golde, J. J. Batenburg. Elsevier, Amsterdam 1984; chap. 12
   Google Scholar
• Ballard P. L., Ballard R. A., Granberg J. P., Sniderman S., Gluckman P. D., Kaplan S. L., Gumbach M. M. Fetal sex and prenatal betamethasone therapy. J. Pediatr. 1980; 97: 451
   PubMed Web of Science ®Google Scholar
• Liggins G. C., Howie R. N. A controlled trial of antepartum glucocorticoid treatment for prevention of the respiratory distress syndrome in premature infants. Pediatrics 1972; 50: 515
   PubMed Web of Science ®Google Scholar
• Zuspan F. P., Cordero L., Semchyshyn S. Effects of hydrocortisone on lecithin-sphingomyelin ratio. Am. J. Obstet. Gynecol. 1977; 128: 571
   Google Scholar
• Arias F., Pineda J., Johnson L. W. Changes in human amniotic fluid lecithin/sphingomyelin ratio and dipalmitoyl lecithin associated with maternal betamethasone therapy. Am. J. Obstet. Gynecol. 1979; 133: 894
   Google Scholar
• Farrell P. M., Engle M. J., Zachman R. D., Curet L. B., Morrison J. C., Rao A. V., Poole W. K., Collaborative Group on Antenatal Steroid Therapy. Amniotic fluid phospholipids after maternal adminstration of dexamethasone. Am. J. Obstet. Gynecol. 1983; 145: 484
   Google Scholar
• Caritis S. N., Mueller-Heubach E., Edelstone D. I. Effect of betamethasone on analysis of amniotic fluid in the rhesus-sensitized pregnancy. Am. J. Obstet. Gynecol. 1977; 127: 529
   Google Scholar
• Beck J. C., Johnson J. W. C., Mitzner W., Lee P. A., London W. T., Sly D. L. Glucocorticoids, hyperinsuluiemia, and fetal lung maturation. Am. J. Obstet. Gynecol. 1981; 139: 465
   Google Scholar
• Whitsett J. A., Pilot T., Clark J. C., Weaver T. E. Induction of surfactant protein in fetal lung. J. Biol. Chem. 1987; 262: 5256
   PubMed Web of Science ®Google Scholar
• Hitchcook K. R. Lung development and the pulmonary surfactant system: hormonal influences. Anal. Rec. 1980; 198: 13
   Google Scholar
• Dudenhausen J. W. Alternatives to the antenatal glucocorticoid treatment for the prevention of respiratory distress syndrome. J. Perinat. Med. 1987; 15: 453
   PubMed Web of Science ®Google Scholar
• Gross I., Wilson C. M. Fetal lung in organ culture. IV. Supra-additive hormone interactions. J. Appl. Physiol. 1982; 52: 1420
   PubMed Web of Science ®Google Scholar
• Smith B. T., Giroud C. J. P., Robert M., Avery M. E. Insulin antagonism of cortisone action on lecithin synthesis by cultured fetal lung cells. J. Pediatr. 1975; 87: 953
   PubMed Web of Science ®Google Scholar
• Bourbon J. R., Farrell P. M. Fetal lung development in the diabetic pregnancy. Pediatr. Res. 1985; 19: 253
   PubMed Web of Science ®Google Scholar
• Hallman M., Wermer D., Epstein B. L., Gluck L. Effects of maternal insulin or glucose infusion on the fetus: study on lung surfactant phospholipids, plasma myoinositol, and fetal growth in the rabbit. Am. J. Obstet. Gynecol. 1982; 142: 877
   PubMedGoogle Scholar
• Miller H. C., Futrakul P. Birth weight, gestational age, and sex as determining factors in the incidence of respiratory distress syndrome of prematurely bom infants. J. Pediatr. 1968; 72: 628
   PubMed Web of Science ®Google Scholar
• Floros J., Nielsen H. C., Torday J. S. Dihydrotestosterone blocks fetal lung fibroblast-pneu-monocyte factor at a pretranslational level. J. Biol. Chem. 1987; 262: 13592
   PubMed Web of Science ®Google Scholar
• Naeye R. L., Freeman R. K., Blanc W. A. Nutrition, sex, and fetal lung maturation. Pediatr. Res. 1974; 8: 200
   PubMed Web of Science ®Google Scholar
• Torday J. S., Nielsen H. C., Fend M. D. M., Avery M. E. Sex differences in fetal lung maturation. Am. Rev. Respir. Dis. 1981; 123: 205
   PubMed Web of Science ®Google Scholar
• Goldenberg V. E., Buckingham S., Sommers S. C. Pilocarpine stimulation of granular pneu-mocyte secretion. Lab. Invest. 1969; 20: 147
   PubMed Web of Science ®Google Scholar
• Wyszogrodski I., Kyei-Aboagye K., Taeusch H. W., Avery M. E. Surfactant inactivation by hyperventilation: conservation by end-expiratory pressure. J. Appt. Physiol. 1975; 38: 468
   Google Scholar
• Oyarzun M. J., Clements J. A. Control of lung surfactant by ventilation, adrenergic mediators, and prostaglandins in the rabbit. Am. Rev. Respir. Dis. 1978; 117: 879
   PubMed Web of Science ®Google Scholar
• Corbet A. J., Kolni H. W., Perreault T., Frink J. A., Rudolph A. J. Development of beta-adrenergic co trol of phospholipid secretion in rabbit lung. J. Appl. Physiol. 1985; 58: 2011
   Google Scholar
• Enhorning G., Chamberlain D., Contreras C., Burgoyne R., Robertson B. Isoxuprine-induced release of pulmonary surfactant in the rabbit fetus. Am. J. Obstet. Gynecol. 1977; 129: 197
   PubMed Web of Science ®Google Scholar
• Kanjanapone V., Hartig-Beecken I., Epstein M. F. Effect of isoxuprine on fetal lung surfactant in rabbits. Pediatr. Res. 1980; 14: 278
   PubMed Web of Science ®Google Scholar
• Odom M. J., Snyder J. M., Mendelson C. R. Adenosine 3′, 5′-monophosphate analogs and beta-adrenergic agonists induce the synthesis of the major surfactant apoprotein in human fetal lung in vitro. Endocrinology 1987; 121: 1155
   PubMed Web of Science ®Google Scholar
• Dudenhausen J. W., Kynast G., Lange-Lindberg A. M., Saling E. Influence of long-term beta-mimetic therapy on the lecithin content of amniotic fluid. Gynecol. Obstet. Invest. 1978; 9: 205
   Google Scholar
• Boog G., Gandar R. Beta-mimetic drugs and possible prevention of respiratory distress syndrome. Br. J. Obstet. Gynecol. 1975; 82: 285
   PubMedGoogle Scholar
• Bergman B., Hedner T. Antepartum administration of terbutaline and the incidence of hyaline membrane disease in preterm infants. Acta Obstet. Gynecol. Scand. 1978; 57: 217
   PubMed Web of Science ®Google Scholar
• Curet L. B., Rao V. A., Zachman R. D., Morrison J. C., Burkett G., Poole W. K., Bauer C., Collaborative Group on Antenatal Steroid Therapy. Association between ruptured membranes, tocolytic therapy, and respiratory distress syndrome. Am. J. Obstet. Gynecol. 1984; 148: 263
   Google Scholar
• Morrison J. C., Whybrew W. D., Bucovaz E. T., Wiser W. L., Fish S. A. The lecithin/sphingomyelin ratio in cases associated with fetomaternal disease. Am. J. Obstet. Gynecol. 1977; 127: 363
   PubMed Web of Science ®Google Scholar
• Aubrey R. H., Rourke J. E., Almanza R., Cantor R. M., Van Doren J. E. The lecithin/sphingomyelin ratio in a high-risk obstetric population. Obstet. Gynecol. 1976; 47: 21
   Google Scholar
• Quintan R. W., Buhi W. C., Cruz A. C. Fetal pulmonary maturity in isoimmunized pregnancies. Am. J. Obstet. Gynecol. 1984; 148: 787
   Google Scholar
• Bustos R., Kulovich M. V., Gluck L., Gabbe S. G., Evertson L., Vargas C., Lowenberg E. Significance of phosphatidylglycerol in amniotic fluid in complicated pregnancies. Am. J. Obstet. Gynecol. 1979; 133: 899
   PubMed Web of Science ®Google Scholar
• Horenstein J., Golde S. H., Piatt L. D. Lung profiles in the isoimmunized pregnancy. Am. J. Obstet. Gynecol. 1985; 153: 443
   Google Scholar
• Skjaeraasen J., Stray-Pedersen S. Amniotic fluid phosphatidylinositol and phosphatidylglycerol. II. Diabetic and pre-eclamptic pregnancies. Acta Obstet. Gynecol. Scand. 1979; 58: 433
   Web of Science ®Google Scholar
• Dyson D., Blake M., Gassady G. Amniotic fluid lecithin/sphingomyelin ratio in complicated pregnancies. Am. J. Obstet. Gynecol. 1974; 122: 722
   Google Scholar
• Skjaeraasen J. Amniotic fluid phospholipid concentrations in pregnancies with pre-eclampsia and/or intrauterine growth-retardation of the fetus. Acta Obstet. Gynecol. Scand. 1979; 58: 191
   PubMed Web of Science ®Google Scholar
• Kulovich M. V., Gluck L. The lung profile. II. Complicated pregnancy. Am. J. Obstet. Gynecol. 1979; 135: 64
   PubMed Web of Science ®Google Scholar
• Bayer H., Bonnar J., Phizackerley P. J. R., Moore R. A., Wylie F. Amniotic fluid phospholipids in normal and abnormal pregnancy. J. Obstet. Gynaecol. Br. Commonw. 1973; 80: 333
   Google Scholar
• Dewhurst C. J., Dunham A. M., Harvey D. R., Parkinson C. E. Prediction of respiratory distress syndrome by estimation of surfactant in the amniotic fluid. Lancet 1973; 1: 1475
   Google Scholar
• Donald I. R., Freeman R. K., Goebelsmann U., Chan W. H., Nakamura R. M. Clinical experience with the amniotic fluid lecithin/sphingomyelin ratio. I. Antenatal prediction of pulmonary maturity. Am. J. Obstet. Gynecol. 1973; 115: 549
   Google Scholar
• Lindback T. Amniotic fluid lecithin concentrations in pregnancies complicated by hypertensive disorders and intrauterine growth retardation. Acta Obstet. Gynecol. Scand. 1976; 55: 355
   PubMed Web of Science ®Google Scholar
• Gross T. L., Sokol R. J., Wilson M. V., Kuhnert P. M., Hirsch V. Amniotic fluid phosphatidylglycerol: a potentially useful predictor of intrauterine growth retardation. Am. J. Obstet. Gynecol 1981; 140: 277
   Google Scholar
• Fairbrother P. F., Du Toit I. L., Cheifltz R. L. The amniotic fluid foam test and fat cell count in malnourished and well-nourished fetuses. Br. J. Obstet. Gynecol. 1975; 82: 182
   Google Scholar
• Gunston K. D., Davey D. A. Growth-retarded fetuses and pulmonary maturity. S. Afr. Med. J. 1978; 54: 493
   Google Scholar
• Richardson C. J., Pomerance J. J., Cunningham M. D., Gluck L. Acceleration of fetal lung maturation following prolonged rupture of the membranes. Am. J. Obstet. Gynecol. 1974; 118: 1115
   PubMed Web of Science ®Google Scholar
• Robert M. F., Neff R. K., Hubbell J. P., Taeusch H. W., Avery M. E. Association between maternal diabetes and the respiratory-distress syndrome in the newborn. N. Engl. J. Med. 1976; 294: 357
   PubMed Web of Science ®Google Scholar
• Whitfield C. R., Sproule W. B. The amniotic fluid lecithin:sphingomyelin area ratio (LSAR) in pregnancies complicated by diabetes. J. Obstet. Gynaecol. Br. Commonw. 1973; 80: 918
   Google Scholar
• Fadel H. F., Saad S. A., Nelson G. H., Davis H. C. Effect of matemal-fetal disorders on lung maturation. I. Diabetes mellitus. Am. J. Obstet. Gynecol. 1986; 155: 544
   Google Scholar
• Tabsb K. M. A., Brinkmann C. R., III, Bashor R. A. Lecithin:sphingomyelin ratio in regnancies complicated by insulin-dependent diabetes mellitus. Obstet. Gynecol. 1982; 59: 353
   Google Scholar
• Hallman M., Epstein B. L. Role of myo-inositol in the synthesis of phosphatidylglycerol and phosphatidylinositol in the lung. Biochem. Biophys. Res. Commun. 1980; 92: 1151
   PubMed Web of Science ®Google Scholar
• Hallman M., Teramo K. Amniotic fluid phospholipid profile as a predictor of fetal maturity in diabetic pregnancies. Obstet. Gynecol. 1979; 54: 703
   PubMed Web of Science ®Google Scholar
• Tyden O., Berne C, Eriksson U. J., Hansson U., Stangenberg M., Persson B. Fetal maturation in stricdy controlled diabetic pregnancy. Diabetes Res. 1984; 1: 131
   Google Scholar
• Amon E., Lipshitz J., Sibai B. M., Abdella T. N., Whybrew D. W., El-Nazer A. Quantitative analysis of amniotic fluid phospholipids in diabetic pregnant women. Obstet. Gynecol. 1986; 68: 373
   PubMed Web of Science ®Google Scholar
• McMahan M. J., Minouni F., Miodovnik M., Hull W. M., Whitsett J. A. Surfactant associated protein (SAP-35) in amniotic fluid from diabetic and nondiabetic pregnancies. Obstet. Gynecol. 1987; 70: 94
   PubMed Web of Science ®Google Scholar
• Lemons J. A., Jaffee R. B. Amniotic fluid lecithin/sphingomyelin ratio in the diagnosis of hyaline membrane disease. Am. J. Obstet. Gynecol. 1973; 115: 233
   Google Scholar
• Cruz A. C., Buhi W. C., Birk S. A., Spellacy W. N. Respiratory distress syndrome with mature lecithin/sphingomyelin ratios: diabetes mellitus and low Apgar scores. Am. J. Obstet. Gynecol. 1976; 126: 78
   PubMed Web of Science ®Google Scholar
• Dahlenburg G. W., Martin F. I. R., Jeffrey P. E., Horacek I. Amniotic fluid lecithin/sphingomyelin ratio in pregnancy complicated by diabetes. Br. J. Obstet. Gynecol. 1977; 84: 294
   Google Scholar
• Curet L. B., Olson R. W., Schneider J. M., Zachman R. D. Effect of diabetes mellitus on amniotic fluid lecithin/sphingomyelin ratio and respiratory distress syndrome. Am. J. Obstet. Gynecol. 1979; 135: 10
   Google Scholar
• Mashini I. S., Fadel H. E., Nelson G. D., Hadi H. Indications for and timing of delivery in diabetic pregnancies. Am. J. Obstet. Gynecol. 1985; 153: 759
   Google Scholar
• Dudley D. K. L., Black D. M. Reliability of lecithin/sphingomyelin ratios in diabetic pregnancy. Obstet. Gynecol. 1985; 66: 521
   Google Scholar
• James D. K., Chiswick M. L., Harkes A., Williams M., Tindall V. R. Maternal diabetes and neonatal respiratory distress. II. Prediction of fetal lung maturity. Br. J. Obstet. Gynecol. 1984; 91: 325
   PubMedGoogle Scholar
• Lowensohn R. I., Gabbe S. G. The value of lecithin/sphingomyelin ratios in diabetes: a critical review. Am. J. Obstet. Gynecol. 1979; 134: 702
   Google Scholar
• Usher R., McLean F., Maughan G. B. Respiratory distress syndrome in infants delivered by Cesarean section. Am. J. Obstet. Gynecol. 1964; 88: 806
   PubMed Web of Science ®Google Scholar
• Usher R. H., Allen A. C., McLean F. H. Risk of respiratory distress syndrome related to gestation age, route of delivery, and maternal diabetes. Am. J. Obstet. Gynecol. 1971; III: 826
   Google Scholar
• Mueller-Heubach E., Caritis S. N., Edelstone D. I., Turner J. H. Lecithin/sphingomyelin ratios in diabetic pregnancies. Am. J. Obstet. Gynecol. 1980; 136: 265
   Google Scholar
• Mimouni F., Miodovnik M., Whitsett J. A., Holroyde J. C., Siddiqi T. A., Tsang R. C. Obstet. Gynecol. 1987; 69: 191
   Google Scholar
• Smith B. T., Torday J. S. Factors affecting lecithin synthesis by fetal lung cells in culture. Pediatr. Res. 1974; 8: 848
   PubMed Web of Science ®Google Scholar
• Merritt T. A., Farrell P. M. Diminished pulmonary lecithin synthesis in acidosis: experimental findings as related to the respiratory distress syndrome. Pediatrics 1976; 57: 32
   PubMedGoogle Scholar
• Kenny J. D., Adams J. M., Corbet A. J. S., Rudolph A. J. The role of acidosis at birth in the development of hyaline membrane disease. Pediatrics 1976; 58: 184
   Google Scholar
• Lipshitz J., Whybrew W. D., Anderson G. D. Comparison of the Lumadex-foam stability index test, lecithin:sphingomyelin ratio, and simple shake test for fetal lung maturity. Obstet. Gynecol. 1984; 63: 349
   Google Scholar
• Sher G., Statland B. E. Asessment of fetal pulmonary maturity by the Lumadex foam stability index test. Obstet. Gynecol. 1983; 61: 444
   PubMed Web of Science ®Google Scholar
• Socol M. L., Sing E., Depp O. R. The tap test: a rapid indicator of fetal pulmonary maturity. Am. J. Obstet. Gynecol. 1984; 148: 445
   PubMed Web of Science ®Google Scholar
• Cotton D. B., Hills B. A. Pulmonary surfactant: hydrophobic nature of the mucosal surface of the human amnion. J. Physiol. 1984; 349: 411
   Google Scholar
• Blumenfeld T. A., Stork R. I., James L. S., George J. D., Dyrenfurth I., Freda V. J., Shinitzky M. Determination of fetal lung maturity by fluorescence polarization of amniotic fluid. Am. J. Obstet. Gynecol. 1978; 130: 782
   PubMed Web of Science ®Google Scholar
• Petersen L. C., Birdi K. S. The effect of fetal pulmonary surfactant production on the apparent microviscosity of amniotic fluid measured by fluorescence polarization. J. Clin. Lab. Invest. 1983; 43: 41
   Google Scholar
• Blumenfeld T. A., Cheskin H. S., Shinitzky M. Microviscosity of amniotic fluid phospholipids, and its importance in determining fetal lung maturity. Clin. Chem. 1979; 25: 64
   PubMed Web of Science ®Google Scholar
• Tait J. F., Foerder C. A., Ashwood E. R., Benedetti T. J. Prospective clinical evaluation of an improved fluorescence polarization assay for predicting fetal lung maturity. Clin. Chem. 1987; 33: 554
   Google Scholar
• Russell J. C. A calibrated fluorescence polarization assay for assessment of fetal lung maturity. Clin. Chem. 1987; 33: 1177
   PubMed Web of Science ®Google Scholar
• Elrad H., Beydoun S. N., Hagen J. H., Cabalum M. T., Aubrey R. T., Smith C. Fetal pulmonary maturity as determined by fluorescent polarization of amniotic fluid. Am. J. Obstet. Gynecol. 1978; 132: 681
   PubMed Web of Science ®Google Scholar
• Gonen R., Tal J., Oettinger M., Samberg I., Sharf M., Yechielei H., Boxer J. Assessment of fetal lung maturity by a microviscosimeter. Obstet. Gynecol. 1978; 51: 422
   Google Scholar
• Cox K. H., Ross J. B. A., Peterson A. P., Benedetti T. J. Fetal lung maturity assessed by fluorescence polarization: evaluation of predictive value, correction for endogenous fluorescence, and comparison with L/S ratio. Clin. Chem. 1983; 29: 346
   PubMed Web of Science ®Google Scholar
• Ashwood E. R., Tait J. F., Foerder C. A., Franklin R. W., Benedetti T. J. Improved fluorescence polarization. III. Retrospective clinical evaluation and comparison with the lecithin/sphingomyelin ratio. Clin. Chem. 1986; 32: 260
   PubMed Web of Science ®Google Scholar
• Robertson E. A., Zweig M. H. Use of receiver operating characteristic curves to evaluate the clinical performance of analytical systems. Clin. Chem. 1981; 27: 1569
   PubMed Web of Science ®Google Scholar
• Garite T. J., Yabusaki K. K., Moberg L. J., Symons J. L., White T., Itano M., Freeman R. K. A new rapid slide agglutination test for amniotic fluid phosphatidylglycerol: laboratory and clinical correlation. Am. J. Obstet. Gynecol 1983; 147: 681
   PubMed Web of Science ®Google Scholar
• Benoit J., Merrill S., Rundell C., Meeker C. I. Amniostat-FLM: an initial clinical trial with both vaginal pool and amniocentesis samples. Am. J. Obstet. Gynecol. 1986; 154: 65
   PubMedGoogle Scholar
• Lockitch G., Wittmann B. K., Mura S. M., Hawkley L. C. Evaluation of the Amniostat-FLM assay for assessment of fetal lung maturity. Clin. Chem. 1984; 30: 1233
   Google Scholar
• Halvorson P. R., Gross T. L. Laboratory and clinical evaluation of a rapid slide agglutination test for phosphatidylglycerol. Am. J. Obstet. Gynecol. 1985; 151: 1061
   Google Scholar
• Coapman-Hankin R. A., Klechie F. L., Epstein E., Artiss J. D., ZaK B. Three methods compared for determining phosphatidylglycerol in amniotic fluid. Clin. Chem. 1985; 31: 1374
   Google Scholar
• Pillman T., unpublished observations.
   Google Scholar
• Shelley S. A., Balis J. U., Paciga J. E., Knuppel R. A., Ruffolo E. H., Bonis P. J. Surfactant “apoproteins” in human amniotic fluid: an enzyme-linked immunosorbent assay for the prenatal assessment of lung maturity. Am. J. Obstet. Gynecol. 1982; 144: 224
   PubMed Web of Science ®Google Scholar
• Katyal S. L., Amenta J. S., Singh G., Silverman J. A. Deficient lung surfactant apoproteins in amniotic fluid with mature phospholipid profile from diabetic pregnancies. Am. J. Obstet. Gynecol. 1984; 148: 48
   PubMed Web of Science ®Google Scholar
• Hallman M., Arjomaa P., Misumoto M., Akino T. Surfactant proteins in the diagnosis of fetal lung maturity. I. Predictive accuracy of the 35 kD protein, the lecithin/sphingomyelin ration, and phosphatidylglycerol. Am. J. Obstet. Gynecol. 1988; 158: 531
   PubMed Web of Science ®Google Scholar
• Logan R. W., Farquharson J., Jameison E. C. Phosphatidylglycerol in amniotic fluid [letter]. Clin. Chem. 1986; 32: 572
   Google Scholar
• Artiss J. D., Zak B., Keichle F. L., Coapman-Hankin R. A., Epstein E. Phosphatidylglycerol in amniotic fluid [response]. Clin. Chem. 1986; 32: 572
   Google Scholar
• Egberts J. Determination of phosphatidylglycerol: which method gives the correct value [letter]. Clin. Chem. 1986; 32: 401
   Google Scholar
• Herold D. A., Reed A. E. Interference by endogenous glycerol in an enzymatic assay of phosphatidylglycerol in amniotic fluid. Clin. Chem. 1988; 34: 560
   Google Scholar
• Farquaharson J., Jameison E. C., Paton R. D., Black J., Logan R. W. Quantitative determination of phosphatidylglycerol in amniotic fluid by enzymatic assay. Clin. Chem. Acta 1985; 152: 55
   Google Scholar
• Whitfield C. R. Amniotic fluid. Scientific Basis of Obstetrics and Gynecology, R. R. Macdonald. Churchill Livingstone, London 1978; chap. 1
   Google Scholar
• Hutchinson D. L., Hunter C. B., Neslen E. D., Plentl A. A. The exchange of water and electrolytes in the mechanism of amniotic fluid formation and the relationship to hydramnios. Surg. Gynecol. Obstet. 1955; 100: 391
   Google Scholar
• Fisher P. M., Sutherland H. W., Dinwiddie R., Russell G. Shake test on amniotic fluid and the respiratory distress syndrome. Br. Med. J. 1973; 2: 423
   Google Scholar
• Tsai M. Y., Shultz E. K., Williams P. P., Bendel R., Butler J., Farb H., Wagner G., Knox E. G., Julian T., Thompson T. R. Assay of disaturated phosphatidylcholine in amniotic fluid as a test of fetal lung maturity; experience with 2000 analyses. Clin. Chem. 1987; 33: 1648
   PubMedGoogle Scholar
• Wagstaff T. I., Whyley G. A., Freedman G. Factors influencing the measurement of the lecithin/ sphingomyelin ratio in amniotic fluid. J. Obstet. Gynaecol., Br. Commonw. 1974; 81: 264
   PubMedGoogle Scholar
• Barkai G., Mashiach S., Reichman B., Modan M., Meir E., Goldman B. Effect of blood contamination on the fluorescence polarization value of amniotic fluid lamellar bodies. Obstet. Gynecol. 1986; 68: 379
   Google Scholar
• Shelley S. A., Paciga J. E., Balis J. U. Purification of surfactant from lung washings and washings contaminated with blood constituents. Lipids 1977; 12: 505
   PubMed Web of Science ®Google Scholar
• Sunderman F. W., Fan Soestbergen A. A. Probability computations for clinical interpretations of screening tests. Am. J. Clin., Pathol. 1971; 55: 105
   Google Scholar
• Galen R. S., Gambino S. R. More on prevalence and predictive value, and their relationship to medical practice. Beyond Normality. John Wiley & Sons, New York 1975; chap. 3
   Google Scholar