Diagnostic Tests

Question 1

What are Maternity Diagnostic Tests ?

Answer 1

• Non-stress test (NST)
• Biophysical Profile test (BPP)
• Contraction stress test (CST)

Question 2

What do you want to see in a Non-stress test ?

Answer 2

Two or more accelerations of 15 beats/minute (or more) with or without fetal movement

Question 3

What is Acceleration defined as ?

Answer 3

Acceleration is when the fetal heart rate has an abrupt increase from the baseline.

• this is visualized on the Fetal heart monitor
• The increase is greater than or equal to 15 beats/minute above the baseline and lasts at least 15 seconds, but the HR should come back to baseline within 2 minutes

Question 4

With a Non-stress test, each increase should last for _______ seconds and recorded for _______ minutes ?

Answer 4

15 seconds

20 minutes

Question 5

Do you want a Non-stress test to be reactive or non-reactive ?

Answer 5

Reactive (means accelerations present)

• Variability in FHR is good like adults-

Question 6

What diagnostic test is commonly done in the last trimester ?

Answer 6

Biophysical Profile Test (BPP)

Question 7

Biophysical Profile Test can also be done when and why ?

Answer 7

At 28 weeks in a high-risk pregnancy

Question 8

High risk pregnancy’s may have a ________ every week or even twice a week in the 3rd trimester ?

Answer 8

Biophysical Profile Test (BPP)

Question 9

In a Biophysical Profile Test the measurements are obtained how ?

Answer 9

By ultrasound

Question 10

Each parameter in a Biophysical Profile Test counts as how many points ?

Answer 10

2 points

a 10/10 is a perfect score

Question 11

what are Parameters of a Biophysical Profile Test ?

Answer 11

• Heart Rate
• Muscle tone
• Movement
• Breathing
• The amount of Amniotic Fluid around the baby

Question 12

What is the observation timer a BPP Test ?

Answer 12

30 minutes by Sonogram

Question 13

How are the results of a BPP Test evaluated ?

Answer 13

• 8-10 = good
• 6 = worrisome (consider repeating the test in 24 hours)
• 4 = ominous (consider immediate delivery)

Question 14

With a BPP of 6 or lower the PCP may want to do what ?

Answer 14

Deliver the baby

Question 15

A Contraction Stress Test (CST) is also known as what ?

Answer 15

An Oxytocin Challenge Test

Question 16

When are Contraction Stress Tests performed ?

Answer 16

On high risk pregnancies, such as…

• Preeclampsia
• Maternal Diabetes
• And any condition which placental insufficiency is suspected

Question 17

Contraction Stress Test (CST) are generally done if what ?

Answer 17

If Non-stress test (NST) is not reactive

Question 18

What does a Contraction Stress test (CST) determine ?

Answer 18

Determines if the baby can handle the stress of a uterine contraction

Question 19

What do uterine contractions do ?

Answer 19

They decrease blood flow to the uterus and the placenta

Question 20

If blood flow decreases enough to cause hypoxia in the fetus, what will happen ?

Answer 20

The fetal heart rate will decrease from the baseline

(this is called deceleration)

Question 21

What do you Not want to see in a Contraction Stress Test (CST)

Answer 21

Late decelerations

• this means uteroplacental insufficiency, which means the placenta is wearing out

Question 22

Do you want a positive or negative Contraction Stress Test (CST) ?

Answer 22

Negative!

means no late decelerations

Question 23

A Contraction Stress Test (CST) is rarely performed before how many weeks ?

Answer 23

28 weeks

don’t want to result in delivery before 28 weeks

Question 24

Results of a Contraction Stress Test (CST) are only good for how long ?

Answer 24

One week

Question 25

What are 3 types of Decelerations ?

Answer 25

• Early decelerations (Not bad)
• Late decelerations (bad)
• Variable decelerations (bad)

Question 26

What are Early decelerations caused by ?

Answer 26

Benign - and caused by physiological hypoxia from fetal head compression

Question 27

What are Late Decelerations caused by ?

Answer 27

BAD! - Caused by uteroplacental insufficiency (UPI)

Question 28

What are Variable Decelerations caused by ?

Answer 28

Bad! - Caused by umbilical cord compression (CC)