advance prenatal evaluation

Question 1

when can we use ultrasound

Answer 1

any gestational age

Question 2

what is the risk for ultrasound

Answer 2

No risk

Question 3

what are the sensitivities for ultrasound prediction of GA at 1, 2, 3 trimesters

Answer 3

1st +/- 1 week
2nd +/- 2 weeks
3rd +/- 3 weeks

Question 4

when do we use transcranial doppler and what are the risks

Answer 4

> 20 wks and there are no risks

Question 5

is transcranial doppler sensitive and fro what

Answer 5

Yes, highly sensitive and for fetal anemia

Question 6

what is transcranial doppler measuring

Answer 6

fetal blood velocity

Question 7

when can we use amniocentesis

Answer 7

only reliable at >16wks to term

Question 8

what is the amniocentesis used for

Answer 8

genetic screening and fetal anemia

Question 9

what are the risks of amniocentesis

Answer 9

needle insertion 1:300 fetal loss

Question 10

chorionic villus sampling is used when and for what

Answer 10

> 10 wks, genetic testing and karyotyping

Question 11

what are the risks?

Answer 11

fetal loss is 1:500

Question 12

why is CVS any better?

Answer 12

early detection/termination

Question 13

what is percutaneous umbilical cord blood sampling used for and when do we use it?

Answer 13

to confirm and treat fetal anemia

>20 wks, <34 wks