04 - PRENATAL LAB TESTS

Question 1

First Trimester: Routine (11)

Answer 1

1. Blood-type and Rh Factor screen
2. CBC
3. Hb or Hct
4. Rapid Plasma Reagin (RPR)
5. Rubella
6. Tb screening
7. Hep B
8. HIV
9. Urinalysis and Culture
10. Pap test
11. Vaginal culture

Question 2

Blood-type and Rh Factor screen determines risk for

Answer 2

maternal-fetal blood incompatibility

Question 3

CBC dectects (3)

Answer 3

1. Anemia
2. Infection
3. Cell abnormalities

Question 4

Hemoglobin or Hematocrit tests detect

Answer 4

anemia

Question 5

Syphilis screen (mandated by law)

Answer 5

Rapid Plasma Reagin (RPR)

Question 6

Rubella titer determines

Answer 6

Immunity to Rubella

Question 7

Tuberculosis screening is done via (2)

Answer 7

1. PPD skin test

2. Serum blood test

Question 8

Hepatitis B screen identifies

Answer 8

carriers of Hep B

Question 9

HIV screen detects

Answer 9

HIV infection

Question 10

HIV screen is required by __

Answer 10

some states

Question 11

Urinalysis and Culture tests detects (3)

Answer 11

1. Infection
2. Renal disease
3. Diabetes

Question 12

Urinalysis and Culture tests are recommended for __ __

Answer 12

asymptomatic bacteruria

Question 13

Papanicolaou (Pap) test screens for

Answer 13

cervical cancer

Question 14

Papanicolaou (Pap) test is done if it was NOT done within ___ before conception

Answer 14

6 months

Question 15

Vaginal culture detects (2)

Answer 15

1. group B streptococci, or

2. STIs

Question 16

First Trimester: If indicated (2)

Answer 16

1. Hb Electrophoresis

2. Endovaginal US

Question 17

First Trimester: The Endovaginal US is performed when ___ is suspected

Answer 17

high risk of fetal loss

Question 18

The Hemoglobin Electrophoresis test identifies

Answer 18

presence of SICKLE CELL trait or disease

Question 19

Second Trimester: Routine (3)

Answer 19

1. Blood GLUCOSE screen
2. Alpha-fetoprotein
3. Ultrasonography

Question 20

Blood Glucose screen: When is the sample drawn?

Answer 20

1 hour after 50 g of liquid glucose is ingested

Question 21

Blood Glucose screen: Routine test done at ___ of gestation

Answer 21

24 - 28 weeks

Question 22

Blood Glucose screen: Identifies __

Answer 22

gestational diabetes (GDM)

Question 23

Blood Glucose screen: Results above __ necessitate medical follow up

Answer 23

135 mg/dL

Question 24

Second Trimester: Optional routine test to identify *neural tube, or *chromosomal defect in fetus

Answer 24

Serum Alpha-fetoprotein

Question 25

Second Trimester: Optional, noninvasive routine test to identify some anomalies, and confirm EDD

Answer 25

Ultrasonography

Question 26

Third Trimester: If indicated (2)

Answer 26

1. Real-time Ultrasonography

2. Cervical Fibronectin Assay

Question 27

Third Trimester: Determines risk of preterm labor when problem is suspected

Answer 27

Cervical Fibronectin Assay

Question 28

Third Trimester: Real-time Ultrasonography is performed when problem is suspected. It detects (2), determines (1), confirms (3)

Answer 28

• Detects:
  1. Reduced amniotic fluid
  2. Excess amniotic fluid
• Confirms:
  1. Gestational age
  2. Cephalopelvic disproportion
  3. Presence of anomaly
• Determines:
  1. Fetal lung maturity (tandem with amniocentesis)

Question 29

Excess amniotic fluid would indicate __ __ or __ __

Answer 29

fetal anomaly, or maternal problem

Question 30

Reduced amniotic fluid can result in a __ __

Answer 30

fetal problem

Question 31

Real-time ultrasonography: This test may confirm the presence of anomaly that may necessitate ______

Answer 31

fetal or neonatal surgery