[PF] Electronic fetal monitoring definitions

Question 1

The mean FHR rounded to increments of 5 bpm during a 10-min segment excluding:

1. Periodic or episodic changes
2. Periods of marked FHR variability
3. Segments of baseline that differ by more than 25 bpm

Answer 1

Baseline

Question 2

Fluctuations in the baseline FHR that are irregular in amplitude and frequency

Answer 2

Baseline variability

Question 3

A visually apparent abrupt increase (onset to peak in less than 30 seconds) in the FHR

Answer 3

Acceleration

Question 4

The nadir of the deceleration occurs at the same time as the peak of contraction.

Answer 4

Early deceleration

Question 5

The deceleration is delayed in timing, with the nadir of the deceleration occurring after the peak of the contraction.

Answer 5

Late deceleration

Question 6

Visually apparent abrupt decrease in FHR

Answer 6

Variable deceleration

Question 7

Visually apparent decrease in the FHR below the baseline

Answer 7

Prolonged deceleration

Question 8

Visually apparent, smooth, sine wave-line undulating pattern in FHR baseline with a cycle frequency of 3-5 per minute which persists for 20 minutes or more

Answer 8

Sinusoidal pattern

Question 9

The baseline must be for a minimum of 2 min in any 10-min segment or the baseline for that time period is indeterminate. In this case, one may refer to the prior 10-min window for determination of baseline.

Answer 9

Baseline

Question 10

Variability is visually quantified as the amplitude of peak-to-trough in beats per minute.

Answer 10

Baseline variability

Question 11

Amplitude range undetectable

Answer 11

Absent

Question 12

Amplitude range detectable but 5 beats per minutes or fever

Answer 12

Minimal

Question 13

amplitude range 6-25 beats per minute

Answer 13

Moderate (normal)

Question 14

amplitude range greater than 25 beats per minute

Answer 14

Marked

Question 15

At 32 weeks of gestation and beyond, it has a peak of 15 bpm or more above baseline, with a duration of 15 sec or more but less than 2 minutes from onset to return.

Answer 15

Acceleration

Question 16

In most cases the onset, nadir and recovery of the deceleration are coincident with the beginning, peak and ending of the contraction respectively.

Answer 16

Early deceleration

Question 17

In most cases the onset, nadir and recovery of the deceleration occur after the beginning, peak and ending of the contraction respectively.

Answer 17

Late deceleration

Question 18

An abrupt FHR decrease is defined as from the onset of the deceleration to the beginning of the FHR nadir of less than 30 seconds.

Answer 18

Variable deceleration

Question 19

Decrease in FHR from the baseline that is 15 beats per minute or more, and less than 2 minutes in duration.

Answer 19

Prolonged deceleration

Question 20

Normal FHR baseline

Answer 20

110-160 bppm

Question 21

FHR baseline is greater than 160 bpm

Answer 21

Tachycardia

Question 22

FHR baselines is less than 110 bpm

Answer 22

Bradycardia

Question 23

Before 32 weeks, it has a peak of 10 bpm or more above baseline with a duration of 10 seconds or more but less than 2 minutes from onset to return.

Answer 23

Acceleration

Question 24

The decrease in FHR is calculated from the onset to the nadir of the deceleration.

Answer 24

Variable deceleration

Question 25

Lasts 2 minutes or more but less than 10 minutes in duration

Answer 25

Prolonged acceleration

Question 26

If an acceleration lasts 10 minutes or longer, it is a __________

Answer 26

Baseline change

Question 27

The decrease in FHR is 15 beats per minute or greater, lasting 15 seconds or greater and less than 2 minutes in duration.

Answer 27

Variable deceleration

Question 28

When associated with uterine contraction, their onset, depth and duration commonly vary with successive uterine contraction.

Answer 28

Variable deceleration