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15 Cards in this Set
- Front
- Back
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During what trimester is ultrasound measurement of Gestational Age (GA) most reliable?
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first trimester
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What measures are used to approximate Gestational Age?
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crown-rump length (CRL) 5-12 weeks
biparietal diameter (BPD) from 13 weeks femur length (FL) " abdominal circumfered (AC) " |
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During what week(s) does quickening - appreciation of fetal movement - occur?
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17-18 weeks
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How is fundal height used in determining Gestational Age?
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at 20 weeks, the uterus is at the umbilicus and grows approximately 1 cm/wk
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When can fetal heart tones be appreciated by Doppler?
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10-12 weeks
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Nagele's rule
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Due Date = LMP + 9mo + 7d
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How us renal function changed in the setting of pregnancy?
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25-50% increase in renal flow
GFR increases early, then plateaus |
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β-hCG is the standard for diagnosing pregnancy. When and at what level does it peak?
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peaks at 100,000 mIU/mL by 10 weeks of gestation
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How do β-hCG levels change early in pregnancy?
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β-hCG levels double approximately every 48 hours during early pregnancy
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For what reasons might a quantitative β-hCG be needed?
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To diagnose and follow ectopic pregnancy
To monitor trophoblastic disease To screen for fetal aneuploidy |
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What is the relationship between gestational age and quad screening?
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Quad screen results depend on accurate gestational age!
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What is the quad screen?
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Uses AFP, estriol, β-hCG, and inhibin A to predict fetal abormality
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What do variations in MSAFP levels indicate?
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Elevated = open neural tube defects, abdominal wall defects, multiple gestation, incorrect gestational dating, fetal death, placental abnormality
Decreased = trisomy 18, trisomy 21, fetal demise, inaccurate gestational dating |
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What symptoms should be screened for in a pregnant patient with increased BP?
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headache
scotoma RUQ pain |
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Five pertinent questions for pregnant patients.
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contractions
leakage of fluid vaginal bleeding fetal movement dilation at last exam |
