medical notes

Apr 16th, 2015
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ASSESSMENT OF FETAL LUNG MATURITYIndications The American College of Obstetricians and Gynecologists (ACOG) recommended that fetal pulmonary maturity should be confirmed before elective delivery at less than 39 weeks of gestation unless fetal maturity can be inferred from any of the following criteria: Fetal heart tones have been documented for 20 weeks by nonelectronic fetoscope or for 30 weeks by Doppler. Thirty-six weeks have elapsed since a serum or urine human chorionic gonadotropin (hCG) based pregnancy test was reported to be positive. Ultrasound measurement of the crown-rump length at 6 to 11 weeks of gestation or other ultrasound measurements (e.g. biparietal diameter, femur length) at 12 to 20 weeks of gestation support a clinically determined gestational age equal to or greater than 39 weeks.Fetal maturity tests Two types of tests are used to determine pulmonary maturity: (1) biochemical tests measure the concentration of particular components of pulmonary surfactant and (2) biophysical tests evaluate the surface-active effects of these phospholipidsBiochemical tests Lecithin/sphingomyelin ratioIt is based upon the observation that there is outward flow

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