OB lecture 3: Complications of Labor Flashcards

1
Q

How many weeks gestation is considered a “term” pregnancy?

A

for a singleton prenancy: 37-40 weeks

The mean duration of pregnancy is 40 weeks from first day of LMP.

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2
Q

Preterm Labor is defined as:

A

regular uterine contractions occurring at least q10 min resulting in cervical change (dilation) prior to 37 weeks.

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3
Q

preterm birth = ___-___% of deliveries in the USA and accounts for >80% of perinatal morbidity and mortality

A

7-12%

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4
Q

Low birth weight (LBW) is considered:

A

any infant less than 2,500g at birth. (5.5 lbs)

very low birth weight (VLBW) is considered ANY INFANT < 1500g

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5
Q

Mortality rate approaches 90% for infants born less than ___ weeks.

A

24

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6
Q

Survival exceeds 90% when greater than ___ weeks and is greater than 98% by ___ weeks

A

30

34

Survival can increase by about 5% each day between 25-26 weeks.

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7
Q

Preterm Labor is associated with genital tract colonization with ______, ______, and _______.

A

Group B Strep

Gonorrhea

Bacterial Vaginosis

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8
Q

Risks to infant associated with PreTerm Labor:

A
  • Respiratory distress syndrome (most infants less than 27 weeks)
  • sepsis
  • necrotizing enterocolitis
  • Ischemia cerebral damage (cerebral palsy)
  • intracranial hemorrhage (uncontrolled delivery/neonatal HTN)
  • Immature metabolism (prolonged drug effects)
  • hyperbilirubinemia
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9
Q

Tocolytic therapy aims to do what?

A

Attempts to stop or slow contractions to avoid preterm delivery.

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10
Q

Tocolytic therapy has not been proven to prolong gestation or reduce neonatal morbidity in long-term therapy. Tocolytic therapy is used as a short term therapy for less than ___ hours to permit ____ treatment to aid fetal lung maturation.

A

<48 hours

Corticosteroid treatment

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11
Q

_____Inhibits the release of antidiuretic hormone (ADH) and oxytocin.

A

Ethanol

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