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18 Cards in this Set
- Front
- Back
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what is amniotic fluid produced by?
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fetal kidneys, skin and lungs, umbilical cord, membranes
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in 2nd and 3rd trimesters, what accounts for 2/3 of AFI?
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fetal urination
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what are the functions of the amniotic fluid?
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-cushion the fetus
-allow for fetal movement and activity -prevents embryo from adhering to amnion -promote lung growth -regulate temperature |
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when the fetus is less than 15 weeks, what is the AFI from?
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amnion
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at 15-30 weeks, what is AFI from?
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fetal kidneys and skin diffucsion
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greater than 30 weeks, what is AFI from?
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renal function and urine output
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what are the normal levels of amniotic fluid at 10 weeks GA?
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30mL
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what are the normal levels of amniotic fluid at 20 weeks GA?
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300mL
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what are the normal levels of amniotic fluid at 30 weeks GA?
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600mL
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what are the normal levels of amniotic fluid at 36 weeks GA?
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1000mL
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what are the normal levels of amniotic fluid at 38-42 weeks GA?
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600mL
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what is subjective observation?
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sonographer eyeballs the amount of AFI
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what is the maximum vertical pocket?
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largest pocket found
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how do you measure MVP?
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anterior to posterior
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an MVP of 8cm or greater is considered _____________
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polyhydramnios
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what is the pocket method?
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amount of fluid correlated with fetal and placental weight
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a small-for-age fetus: _____ AFI
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low
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large-for-dates fetus: _____ AFI
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high
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