CTG analysis

Question 1

What is the acronym for interpreting FHR tracings?

Answer 1

DR - define risk (low or high)
C - Contractions
Bra - Baseline Rate
V - Variability
A - Accelerations
D - decelerations
O - overall (reassuring or non-reassuring)

Question 2

What is normal baseline rate on CTG?

Answer 2

110-160 bpm

Question 3

What does variability mean on CTG?

Answer 3

at least 10-15bpm

• persistent reduced variability is a particularly ominous sign
• 5 or more for 30-90mins is reassuring

Question 4

What are accelerations on CTG?

Answer 4

• present or absent

- at least greater than or equal to a 15 beat change from baseline lasting greater than or equal to 15sec

Question 5

What are decelerations on CTG?

Answer 5

• early (before contraction): physiological
• variable
• late

non or early is reassuring
variable is non-reassuring

Question 6

What 4 features should be documented when reviewing CTG?

Answer 6

ν baseline fetal heart rate
ν baseline variability
ν presence or absence of decelerations
ν presence of accelerations