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25 Cards in this Set
- Front
- Back
What produces amniotic fluid |
Fetal kidneys Skin Tissues Membranes are |
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What fetal structures help remove amniotic fluid |
GI/GU tract Lungs Membranes Cord |
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Functions of amniotic fluid |
Protects Regulates pressure and temperature Essential for fetal developement such as lung development Reservour for metabolites Prevents adherent to membranes |
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What can AF echogenic foci be |
Vernix caseosa Cellular debris |
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AFI increases up to |
28 wks |
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AFI slowly decreses after |
28 wks |
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AFI peaks at |
24-28 wks |
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Normal AFI range |
5-22 cm |
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What is MVP AFI |
Maximum vertical pocket Measure the deepest pocket in AP |
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Normal MVP AFI |
2-8 cm |
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Oligo is associated with |
DRIPPP |
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DRIPPP |
Demise Renal issues IUGR Post dates PROM Pre-eclampsia /eclamsia |
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Poly is when |
AFI >22 MVP AFI> 8 |
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Oligo is when |
AFI <5 cm MVP AFI <2 cm |
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Causes of poly |
Fetal Maternal |
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Fetal causes for poly |
CNS anomalies GI anomalies Facial clefts masses Fetal hydrops TTTS Sacrococcygeal teratoma Skeletal dysplasia |
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Maternal causes for poly |
Gestational diabetes Rh incompatibility |
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Rate of complication from amniocentesis |
.5% |
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When is amnio performed |
16 wks |
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Why is amnio done late in the 2nd and 3rd trimester |
To check for lung maturity |
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What is LS ratio |
Lecithin/ sphingomyelin ratio To asses lung maturity through amnio |
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Normal LS ratio- lung maturity |
>2:1 |
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What is PG |
Phosphatidylglycerol Appears at 35 wks - shows lung maturity |
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Presence of PG in amniotic fluid shows |
Lung maturity Good finding |
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What is the most accurate method to check for lung maturity? |
LS ratio |