Obstetric Complications Flashcards

1
Q

Preterm labor definiton

A

birth that occurs between 20w and 36w.
Before 20w= Miscarriage
After 36w= Full Term

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2
Q

What must be present to distinguish PTL from Intrauterine Fetal Demise (IUFD)?

A

Uterine Contractions and cervical change of 2cm and/or 80% effacement

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3
Q

4 pathways of prevention of PTL

A
  1. Prevent Infection
  2. Placental-vascular
  3. Reduce Stress/Strain
  4. Uterine stretch
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4
Q

What common bacterial infection is associated with PTL?

A

Bacterial Vaginosis (Gardnerella)

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5
Q

Other common infections to treat to prevent PTL due to link between infection and changes in cervical length

A

Gonorrhea

Chlamydia

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6
Q

How is cervical length related to risk of PTL?

A

Inverse relationship

Increased cervical length decreases PTL risk

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7
Q

Explain the link between maternal stress and PTL

A

Increased mental and physical stress induces release of cortisol and catecholamines.
This stimulates fetal CRH expression which assist in labor

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8
Q

Symptoms of PTL

A

cramping
LBP
Pelvic Pressure
bloody discharge

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9
Q

5 steps to evaluate for PTL

A
  1. Assess Cervix
  2. Look for underlying problems
  3. FHR
  4. Reevaluate Cervix hourly
  5. HYDRATE (resolves 20% of contractions)
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10
Q

What is the gestational age cutoff to administer tocolysis in order to start steroids for fetal lung development?

A

34 weeks

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11
Q

Side effects of Magnesium Sulfate

A

Flushing
NV
Respiratory Depression
Hyporeflexia

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12
Q

3 tocolytics used in management of PTL

A

MgSO4
Nifedipine
Indomethicin

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13
Q

Why does Indomethicin work as a tocolytic?

A

Prostaglandins induce myometrial contractions

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14
Q

A woman between 34w and 36w gestation at risk for PTL should be given what?

A

1 course of betamethasone

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15
Q

What is currently being studied as a preventative measure for risk of PTL?

A

Progesterone administration

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16
Q

What is PROM?

A

Premature Rupture of Membranes- rupture before labor

17
Q

Why should you not check the cervix of a suspected PROM?

A

Increases risk of infection

18
Q

Maternal Risks of PROM

A

Endomyometritis
Sepsis
Failed Induction

19
Q

In a pregnancy with PROM, when does delivery usually occur regardless of fetal lung maturity?

A

34 weeks

20
Q

Symptoms of Chorioamnionitis

A

Maternal Pyrexia
Tachycardia (fetal or maternal)
Uterine tenderness
Discharge

21
Q

In a test for Fetal Lung Maturity, L/S ratio is measured at 1.4
What does this imply?

A

L/S ratio <2 is unfavorable and implies the fetal lungs are not mature

22
Q

What is the Lamellar Body Number Density?

A

A measure of lamellar bodies that indicates fetal lung maturity.

23
Q

What is Intrauterine Growth Restriction (IUGR)?

A

Birth weight below 10% for a given gestational age

24
Q

Maternal causes of IUGR

A
Poor nutrition
Cigarette smoking
Drug Abuse 
Alcoholism 
APA

*Anything that decreases blood flow in mom i.e. vasoconstriction, atherosclerosis, etc.

25
Q

Fetal Causes of IUGR

A

Infection (TORCH)
Listeria (chorioamnionitis)
Trisomies
Multiparity

26
Q

What is the common test done in office to evaluate IUGR?

A

Uterine Fundal Height Measurement

27
Q

When should you order an US to evaluate for IUGR?

A

If Uterine Fundal Height is 3cm or more below gestational age

28
Q

What is a Non-stress Test?

A

Fetal heart rate is monitored for accelerations of 15bpm for 15sec two times in a 30m period.

29
Q

What is a normal and abnormal Biophysical Profile test score?

A

Normal: 8-10
Abnormal: <4

30
Q

What is the recommendation for delivery if US shows IUGR <3 percentile

A

deliver at 37 weeks

31
Q

Define Post-term Pregnancy

A

pregnancy past 42 weeks

32
Q

Postmaturity Syndrome

A

“Too mature, now degrading.”
Placenta begins to degenerate and the fetus begins to lose fat and skin begins to peel.

If placenta remains, at risk for macrosomia

33
Q

IUFD

A

fetal death after 20w but before onset of labor (compared to PTL)
Unknown cause mostly
The worst conversation imaginable