Fetal Monitoring Flashcards

1
Q

What is a non-reassuring fetal status?

A

Fetal distress due to insufficient oxygen (variable / late declarations)

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2
Q

What pattern is shown?

A

Variable decelerations

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3
Q

Describe variable decelerations

A

Abrupt decrease in FHR

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4
Q

What is the cause of variable decelerations?

A

Cord compression

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5
Q

Describe the nursing interventions associated with variable decelerations (5)

A
  • Discontinue pitocin
  • Trendelenburg / knee-chest position position
  • Administer O2 via non-rebreather (8 - 10 L / min)
  • Amnioinfusion
  • Notify provider
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6
Q

What assessment should take place in the case of variable decelerations?

A

Vaginal exam to assess for cord prolapse

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7
Q

What pattern is shown?

A

Early decelerations

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8
Q

Describe early decelerations

A

Gradual decrease in FHR (mirror contractions)

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9
Q

What is the cause of early decelerations?

A

Head compression (normal)

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10
Q

Describe the nursing interventions associated with early decelerations (2)

A
  • Maintain O2
  • Monitor labor progress
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11
Q

What pattern is shown?

A

Accelerations

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12
Q

Describe accelerations

A

Abrupt increase in FHR

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13
Q

Accelerations indicate ______

A

Fetal movement

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14
Q

What is the cause of accelerations?

A

Oxygenation (normal)

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15
Q

Describe the nursing interventions associated with accelerations (2)

A
  • Maintain O2
  • Monitor labor progress
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16
Q

What pattern is shown?

A

Late decelerations

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17
Q

Describe late decelerations

A

Gradual decrease in FHR occurring AFTER onset of a contraction

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18
Q

What is the cause of late decelerations?

A

Placental insufficiency

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19
Q

Describe the nursing interventions associated with late decelerations (6)

A
  • Discontinue pitocin
  • Left lateral position
  • Administer O2 via non-rebreather (8 - 10 L / min)
  • Correct maternal hypotension
  • Increase IV rate
  • Notify provider
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20
Q

What assessment should take place in the case of late decelerations?

A

Palpate uterus to assess for tachysystole

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21
Q

What information is provided by FHR monitoring? (2)

A
  • Fetal response to stress of labor
  • Fetal nervous system intactness
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22
Q

When providing nursing interventions / resuscitation for non-reassuring fetal status, ______ is contraindicated

A

Systemic analgesia (fetal respiratory depression)

23
Q

Stimulation of the ______ nervous system increases FHR

A

Sympathetic

24
Q

Stimulation of the ______ nervous system decreases FHR

A

Parasympathetic

25
Q

______ respond to changes in BP

A

Baroreceptors

26
Q

______ respond to changes in O2 and CO2

A

Chemoreceptors

27
Q

How do uterine contractions affect blood flow to the fetus? (2)

A
  • During a contraction, blood flow is decreased - normally tolerated by fetus
  • In a high risk-pregnancy, FHR may be affected
28
Q

How is external monitoring of uterine activity conducted?

A

Tocotransducer

29
Q

How is external monitoring of FHR conducted?

A

Ultrasound / doppler

30
Q

How is internal monitoring of uterine activity conducted?

A

Intrauterine pressure catheter (IUPC)

31
Q

How is internal monitoring of FHR conducted?

A

Spiral / scalp electrode

32
Q

What is required for internal monitoring or uterine activity / FHR? (2)

A
  • Cervical dilation
  • ROM
33
Q

How can contraction frequency be measured?

A

Tocotransducer / IUPC

34
Q

How can contraction duration be measured?

A

Tocotransducer / IUPC

35
Q

How can contraction intensity be measured?

36
Q

What is baseline rate variation?

A

Rate between accelerations and decelerations (interaction between sympathetic and parasympathetic nervous system)

37
Q

Baseline rate variation is measured over ______

A

10 minutes

38
Q

Minimum section of interpretable baseline duration must be ______

A

≥ 2 minutes

39
Q

What is a normal baseline FHR?

A

110 - 160 BPM

40
Q

What is moderate (normal) FHR variability?

A

5 - 15 BPM

41
Q

What does moderate (normal) FHR variability indicate?

A

Intact fetal nervous system

42
Q

What is minimal FHR variability?

43
Q

Describe fetal tachycardia

A

> 160 BPM for at least 10 minutes

44
Q

What are the common causes of fetal tachycardia? (3)

A
  • Fetal hypoxia
  • Maternal fever
  • Drug use
45
Q

Describe fetal bradycardia

A

< 110 BPM for at least 10 minutes

46
Q

What are the common causes of fetal bradycardia? (3)

A
  • Fetal hypoxia
  • Maternal hypotension
  • Anesthetics
47
Q

______ is the key indicator of danger associated with fetal bradycardia

A

Variability

48
Q

What pattern is shown?

A

Variable decelerations

49
Q

What pattern is shown?

A

Late decelerations

50
Q

What pattern is shown?

A

Normal FHR

51
Q

What pattern is shown?

A

Late decelerations

52
Q

What pattern is shown?

A

Accelerations

53
Q

What pattern is shown?

A

Variable decelerations

54
Q
A

Early decelerations