When might a false-negative result of PAMG-1 If the specimen is collected 12 or more hours occur? after a rupture that is subsequently obstructed by the fetus. What is presence of bilirubin in amniotic fluid Fetal erythroblastosis an indicator of? Why is it important to know the gestational age Because the amount of bilirubin present in the of the fetus when detecting bilirubin in amniotic amniotic fluid changes with gestational age. fluid? How is bilirubin measured in amniotic fluid? By a direct spectrophotometric method referred to as test When are some indications that a test for before repeat cesarean delivery when the age of evaluating fetal lung maturity should be gestation is uncertain performed? preterm labor premature rupture of membranes worsening maternal hypertension severe renal disease intrauterine growth retardation fetal distress What is the counting of Lamellar bodies used Assessing lung maturity. for? How are Lamellar bodies counted? Lamellar bodies have been counted directly using the platelet channel of whole blood cell counters (lamellar body count) What are Lamellar bodies produced by? Type II alveolar Does the quantity of Lamellar bodies increase Increase or decrease as gestation advances? What are Lamellar bodies counted on? Electronic cell counters. During the counting of Lamellar Bodies, what Greater than 50,000 counts/microliter Lamellar Body Count (LBC) indicates fetal lung maturity? What does the contamination with blood do It decreases Lamellar Body Count to the lamellar body count? What will contamination of the smallest amount It dramatically increases Lamellar Body of meconium do to lamellar body count? How does one perform a lamellar body count? With hematology analyzers using the platelet count channel. What lamellar body count is necessary to Lamellar Body Count of 35,000 per microliter. correspond to adequate fetal lung surfactant levels? What LBC indicates immature lung 0-15,000 counts/microliter development? What LBC indicates intermediate fetal lung 15,000- 50,000 counts/microliter development? What represents 85% of surfactants in the body? Lecithin
When might a false-negative result of PAMG-1 occur? If the specimen is collected 12 or more hours after a rupture that is subsequently obstructed by the fetus. What is presence of bilirubin in amniotic fluid an indicator of? Fetal erythroblastosis Why is it important to know the gestational age of the fetus when detecting bilirubin in amniotic fluid? Because the amount of bilirubin present in the amniotic fluid changes with gestational age. How is bilirubin measured in amniotic fluid? By a direct spectrophotometric method referred to as test When are some indications that a test for evaluating fetal lung maturity should be performed? before repeat cesarean delivery when the age of gestation is uncertain preterm labor premature rupture of membranes worsening maternal hypertension severe renal disease intrauterine growth retardation fetal distress What is the counting of Lamellar bodies used for? Assessing lung maturity. How are Lamellar bodies counted? Lamellar bodies have been counted directly using the platelet channel of whole blood cell counters (lamellar body count) What are Lamellar bodies produced by? Type II alveolar Does the quantity of Lamellar bodies increase or decrease as gestation advances? Increase What are Lamellar bodies counted on? Electronic cell counters. During the counting of Lamellar Bodies, what Lamellar Body Count (LBC) indicates fetal lung maturity? Greater than 50,000 counts/microliter What does the contamination with blood do to the lamellar body count? It decreases Lamellar Body Count What will contamination of the smallest amount of meconium do to lamellar body count? It dramatically increases Lamellar Body How does one perform a lamellar body count? With hematology analyzers using the platelet count channel. What lamellar body count is necessary to correspond to adequate fetal lung surfactant levels? Lamellar Body Count of 35,000 per microliter. What LBC indicates immature lung development? 0-15,000 counts/microliter What LBC indicates intermediate fetal lung development? 15,000- 50,000 counts/microliter What represents 85% of surfactants in the body? Lecithin
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