Week 2 FHR Interpretation (everything)- not presented Flashcards Preview

SUM'20 - Advanced Principles > Week 2 FHR Interpretation (everything)- not presented > Flashcards

Flashcards in Week 2 FHR Interpretation (everything)- not presented Deck (48)
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1

Fetal HR Monitoring =

Fetal brain monitoring

2

Brain monitors and responds to what :

1. extrinsic Influences
2. Intrinsic influences
3. Homeostatic interactions b/w the fetus and the environment

3

The Goal of FHR Monitoring is to

maintain optimal blood flow (oxygenation) of the brain w/o compromising other organs

4

Strip Review / Essential characteristics for tracing interpretation:

Clinical Setting -

provides the background risk

5

Strip Review / Essential characteristics for tracing interpretation:

Baseline -

Important to determine all other freatures

6

Strip Review / Essential characteristics for tracing interpretation:

Variability-

a marker of normal pH

7

Strip Review / Essential characteristics for tracing interpretation:

Decelerations -

A marker of ongoing O2 deprivation

8

Strip Review / Essential characteristics for tracing interpretation:

Contractions -

potential cause of O2 deprivation

9

Strip Review / Essential characteristics for tracing interpretation:

Accelerations -

a marker of normal pH

10

Strip Review / Essential characteristics for tracing interpretation:

Change over time -

evidence of an evolving process and marker of time course

11

Order of Oxygen transfer from Environment to fetus:

Environment
Lungs
Heart
vasculature
Placenta
Cord
Fetus

12

The subsequent fetal response if oxygen transfer is disrupted (fetal response); in order:

Hypoxemia
Hypoxia
Metabolic Acidosis
Hypotension
Potential Injury

13

Types of decelerations

Early, Late, Variable (videos)

PPT:
variable
late
prolonged

14

Significant FHR decelerations (variable, late, prolonged) represent

interruptions in fetal oxygen transfer

15

Interruptions in fetal oxygen transfer are represented by

decelerations

16

Disrupted oxygen transfer does not cause injury unless

there is progression to metabolic acidemia

17

Metabolic acidemia + disrupted oxygen transfer =

injury potential

18

the presence of FHR variability and/or accelerations predict

the ABSENCE of metabolic acidosis

*** the converse is not always true***

19

The absence of metabolic acidosis is seen by

the presence of FHR variability and/or accelerations

20

Three Tier System:

Describe Category 1 -

- "Go to" definition of normal.

Baseline: 110-160 bpm
Variability: moderate (6-25 bpm)
Accelerations: present or absent
Decelerations: No late/variable/prolonged

21

Baseline: 110-160 bpm

Category 1

22

Variability: moderate (6-25 bpm)

Category 1

23

Decelerations: No late/variable/prolonged

Category 1

24

Accelerations: present or absent

Category 1

25

Three Tier System:

Describe Category 3

Absent variability WITH any one of the following:
- recurrent late decelerations
- recurrent variable decelerations
- bradycardia

Sinusoidal Pattern
-cycle frequency 3-5/min last at least 20"
*If persists, likely evidence that you are "in deep doo doo"

26

Absent variability WITH any one of the following:
- bradycardia

Category?

Category 3

27

Absent variability WITH any one of the following:
- recurrent late decelerations

Category?

Category 3

28

Sinusoidal Pattern
-cycle frequency 3-5/min last at least 20"

Category?

Category 3

29

Three Tier System:

Describe Category 2

Baseline:
-Bradycardia (<110bpm) with preserved variability
-Tachycardia (>160bpm)
Variability
-Minimal (< or = to 5bpm but detectable)
-Absent (undetectable) *But NOT accompanied by recurrent decelerations
-Marked (>25bpm)
Accelerations
-Absence of acceleration with scalp stimulation
Decelerations:
-Late/Variable/recurrent/Prolonged

30

Three Tier System:

Describe Category 2 BASE LINE (brady and tachy)

-Bradycardia (<110bpm) with preserved variability
-Tachycardia (>160bpm)