Amniotic Fluid

Subdecks (2)

Cards (65)

  • Where is amniotic fluid produced?
    placenta
  • Amniotic fluid surrounds the what during what?
    Fetus during gestation
  • Amniotic fluid can be found inside the what?
    amniotic sac
  • Amniotic fluid provides a protective what?
    cushion
  • Amniotic fluid allows for fetal what?
    movement
  • Amniotic fluid stabilizes what?
    temperature
  • Amniotic fluid permits what?
    proper lung development
  • What trimester of pregnancy are genders and genetic disorders detectable?
    2nd trimester
  • Amniotic fluid testing is done for the antenatal diagnosis of what?
    genetic and congenital disorders
  • Amniotic fluid assesses what?
    fetal lung maturity
  • Amniotic fluid testing assessing the degree of what?
    fetal distress
  • What are the 3 composition of amniotic fluid?
    Fetal urine, lung fluid, and fetal swallowing
  • During the 1st trimester, the composition of the amniotic fluid is similar to what? and with what?
    maternal plasma with sloughed off fetal cells
  • During the 2nd trimester, the major contributor to the amniotic fluid is what?
    fetal urine
  • During the 2nd trimester, what regulates the increase in volume caused by fetal urine production?
    fetal swallowing
  • When fetal urine production begins, what components increases?
    Creatinine, urea, and uric acid
  • When fetal urine production begins, what components decreases?
    glucose and protein
  • What analyte is used to determine the FETAL AGE?
    Creatinine
  • What analytes are used to differentiate MATERNAL URINE from AMNIOTIC FLUID?
    Creatinine, Urea, Glucose, and protein
  • What analytes are HIGHER IN AMNIOTIC FLUID than in maternal urine?
    Glucose and Protein
  • What test is performed to differentiate AMNIOTIC FLUID from other body fluids?
    Fern test
  • Before 36 WEEKS of gestation, what is the normal amount of creatinine in the amniotic sac?
    1.5mg/dL to 2mg/dL
  • A fetal age of MORE THAN 36 WEEKS should contain how much creatinine in the amniotic fluid?
    greater than 2mg/dL
  • What is the amount of UREA in maternal urine?
    300mg/dL
  • What is the amount of UREA in amniotic fluid?
    less than 30mg/dL
  • What is the amount of CREATININE in maternal urine?
    10mg/dL
  • What is the amount of CREATININE in AMNIOTIC FLUID?
    less than 3.5mg/dL
  • What analytes may or may not be present during pregnancy, making them an unreliable indicators?
    glucose and proteins
  • What amniotic fluid test requires a REFRIGERATED or FROZEN specimen?
    Fecal lung maturity test
  • Maternal urine vs. amniotic fluid tests are done to determine possible rupture in where?
    amniotic sac
  • Maternal urine vs. amniotic fluid tests are done to determine accidental puncture of the what during amniocentesis?
    maternal bladder
  • What is a positive result of the Fern Test indicating the sample is an amniotic fluid?
    fern-like crystals
  • Positive fern test is also indicative of the presence of what?
    sodium chloride and protein
  • What is the peak volume of amniotic fluid?
    800-1200 ml
  • Polyhydramnios: Abnormally large volume of amniotic fluid during pregnancy (<1200mL)
  • Polyhydramnios can be due to the absence/decreased of FETAL SWALLOWING or NEUTRAL TUBE DISORDERS
  • Oligohydramnios: decreased amniotic fluid volume (<800mL)
  • Oligohydramnios can be caused by increased FETAL SWALLOWING, URINARY TRACT deformities, and membrane LEAKAGE