FHS, Labor Support, Induction Flashcards
What is Frequency?
How often contractions occur?
Normal: <= 5 contractions in 10 mins, and averaged over a 30 minute period
Tachysystole: [More] lack of uterine rest
What is Duration?
How long the contractions are
Normal: <90seconds
Tachysysole: [Longer] baby not oxygenated
What is Strength?
How strong the contractions are
Weak, Moderate, Strong
What is Resting tone?
Uterine Relaxation
Re-oxygenation for Fetus
Normal: >= 30 seconds
What is Tachysystole?
- Frequency, Duration, Resting Tone
Frequency: >5 in 10 mins
Duration: >90seconds
Resting Tone: <30 seconds
Benefits and Limitation EFM
- External, Internal
External:
- benefits: Less invasive
- limitations: with positioning, not assessing radial pulse
Internal:
- benefits: extremely accurate, can move around
- limitations: invasive, dilated, and ROM
[EFM] Acceleration?
Abrupt increase in FHR (Onset to peak <30 secs)
[Baseline] >= 15 bpm x >= 15 seconds
Increase strength of cardiac contractions
Can be reaction to stimuli
Is OK
[EFM] Early Deceleration?
Gradual (>= 30 s from baseline to nadir)
Mirror image of contraction
Fetal Head compression
Is Normal (consider clinical picture)
[EFM] Late Deceleration?
Gradual (>=30s from baseline to nadir)
Nadir at the end of contraction
Decreased Uteroplacental Blood flow & hypoxia
Can be associated with hypotension
Placenta getting old
[EFM] Variable Deceleration?
Abrupt (< 30s from baseline to nadir)[
[Baseline] 15bpm x >= 15s
Similar to Acceleration but flipped, U shaped
Altered umbilical blood flow/Cord compression
Left Lateral, reposition
[EFM] Variability?
Fluctuation in baseline
Indicates mature CNS, oxygenated brainstem, and intact medulla
Absent: no range
Minimal: <=5 bpm
Moderate: 6-25 bpm
Marked: >25bpm
What is a Non Stress Test?
Looking at Fetal Wellbeing
20 min strip
Need 2 accelerations in 20 minutes
If not, reposition, or give some sugar
What are the goals for Intrauterine Resuscitation?
Improve uterine blood flow
Improve Umbilical Circulation
Improve maternal oxygenation
What are the actions in Intrauterine Resuscitation?
- Confirm FHR and MHR
- Position Change (left, right, then all 4s)
- Remove/Stop IOL
- Modify or pause pushing
- Maternal hydration
- Vaginal Exam
- Tocolysis
- Supportive Care
- Oxygen by mask
- Communicate/Document
What are the reasons to induce?
- Post Dates (41^3+)
- PROM
- Maternal Morbidity
- Fetal distress/IUFD
- Fetal Size