OB lecture 3: Complications of Labor Flashcards
How many weeks gestation is considered a “term” pregnancy?
for a singleton prenancy: 37-40 weeks
The mean duration of pregnancy is 40 weeks from first day of LMP.
Preterm Labor is defined as:
regular uterine contractions occurring at least q10 min resulting in cervical change (dilation) prior to 37 weeks.
preterm birth = ___-___% of deliveries in the USA and accounts for >80% of perinatal morbidity and mortality
7-12%
Low birth weight (LBW) is considered:
any infant less than 2,500g at birth. (5.5 lbs)
very low birth weight (VLBW) is considered ANY INFANT < 1500g
Mortality rate approaches 90% for infants born less than ___ weeks.
24
Survival exceeds 90% when greater than ___ weeks and is greater than 98% by ___ weeks
30
34
Survival can increase by about 5% each day between 25-26 weeks.
Preterm Labor is associated with genital tract colonization with ______, ______, and _______.
Group B Strep
Gonorrhea
Bacterial Vaginosis
Risks to infant associated with PreTerm Labor:
- 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
Tocolytic therapy aims to do what?
Attempts to stop or slow contractions to avoid preterm delivery.
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.
<48 hours
Corticosteroid treatment
_____Inhibits the release of antidiuretic hormone (ADH) and oxytocin.
Ethanol