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6 Cards in this Set
- Front
- Back
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In what cases can you do an Amnio without having a non-invasive prenatal screening test done?
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1. Ultrasound findings highly suggestive of aneuploidy
2. IVF with ICSI 3. Previous history of aneuploidy or a known carrier of aneuploidy |
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What are the requirements of a FIRST TRIMESTER prenatal screening test in canada?
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75% Detection Rate (Sensitivity
3 % False Positive Rate |
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What are the requirements of a SECOND TRIMESTER prenatal screening test?
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75% Detection RATE
5% False positive rAte |
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If you do first trimester screening only WHAT ELSE needs to be done in the second trimester to rule out open neural tube defects?
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a second trimester AFP and/or Detailed US
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In what way do we use soft markers or other findings from second trimester US to assess our overall risk?
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You can look at the a priori risk (ie. 1 in 1000)...and use the likelihood ratio of the soft marker to divide and get a modified risk calculation
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what parameters can influence the test that we need to put on the requisition?
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Gestational age (dating accuracy)
Maternal weight Ethnicity Insulin-Dependent DM Use of Assisted Reproductive technologies |
