chapter 55

Question 1

Chorionic villus sampling (CVS)

Answer 1

an ultrasound-directed biopsy of the placenta or chorionic villi (chorion frondosum)

Question 2

Chorionic villus sampling (CVS) is normally done between which weeks?

Answer 2

10 to 14 weeks

Question 3

Amniocentesis is a test offered to ______?

Answer 3

expectant patients who are at risk for a chromosomal abnormality or biochemical disorder that may be prenatally detectable

Question 4

Amniocentesis test are avaliable within ____ weeks?

Answer 4

1 to 3 weeks

Question 5

fluorescence in situ hybridization (FISH) is?

Answer 5

24 hours results for the most common chromosomal anomalies. - 18, 13, 21, x, y

Question 6

Amniocentesis for genetic reasons is ideally performed between ___?

Answer 6

15 to 20 weeks

Question 7

Alpha- fetoprotein is?

Answer 7

A major protein in fetal serum, produce by yolk sac, then by fetal liver

Question 8

AFP levels are considered abnormal when?

Answer 8

elevated or low.

Question 9

reasons for high AFP levels are?

Answer 9

Neural tube defects, such as anencephaly and open spina bifida,

Question 10

Two common abdominal wall defects?

Answer 10

omphalocele and gastroschisis

Question 11

what caused a obstructed lymph sacs lead to AFP diffusion through the hygroma into the bloodstream and amniotic fluid?

Answer 11

cystic hygroma,

Question 12

x-link disorder inherited by boys, from mother or father?

Answer 12

mother

Question 13

recessive disorder is inherited form ?

Answer 13

both mother and father

Question 14

with each pregnancy, parents have 25% chance of having a fetus with disorder?

Answer 14

recessive disorder

Question 15

with each pregnancy, parents have 50% chance of having a fetus with disorder?

Answer 15

dominant disorder

Question 16

trisomy 18 is known as

Answer 16

Edwards syndrome

Question 17

trisomy 18 is the 1st or 2nd most common?

Answer 17

2nd most common

Question 18

Trisomy 21 is associated with an increased in ____?

Answer 18

NT

Question 19

anomalies include polydactyly, talipes, rocker-bottom feet, and overlapping fingers, is associated with which trisomy?

Answer 19

trisomy 13

Question 20

Cystic hygroma is one of the most pathognomonic findings for which disorder?

Answer 20

turners syndrome