OBGYN EOR Flashcards
(246 cards)
what is the discriminatory zone for visualization of the gestational sac?
bhcg of 1500
bHCG for GTBD
> 100,000
ddx for very low but persistent bHCG
placental site trophoblastic tumor
very malignant
vasa previa
fetal vessel lies over the cervix
Placenta accreta
superficial attachment of the placenta to uterine myometrium
placenta increta
invades myometrium
placenta percreta
invades through myometrium to uterine serosa
MCC og third trimester bleeding
placental abruption
Couvelaire Uterus
life threatening condition that occurs where there is enough blood from abruption that markedly infiltrates myometrium to reach the serosa, especially at the cornea, that gives the myometrium a bluish purple tone that can be seen on the surface of the uterus
MC maternal complication of placental abruption
Consumptive Coagulopathy (DIC) –> leads to thrombocytopenia & hypofibrinogenemia
INCREASED INR & PTT
ideal time for delivery w/ placental abruption
34-37 weeks
- normal fetal heart tracing characterized by normal baseline
- moderate variability
- NO variable or late decels
category I FHR tracing
- many variety of fetal heart tracings
- variable & late decelerations
- bradycardia/ tachycardia
- minimal variability/marked variability
- absent variability w/o decel
category II FHR tracing
- absent fetal heart variability
- recurrent late of variable decels or bradycardia
- sinusoidal pattern (c/w fetal anemia)
Category III
common tocolytic therapy
Indomethacin
Nifedipine
Mag sulfate
Terbutaline
Mag Sulfate Toxicity
Toxic levels > 10 mg/dL
Causes respiratory depression, hypoxia, cardiac arrest, decreased DTRs
therapeutic levles = 4-8 mg/dL
indomethacin
tocolytic commonly used before 32 weeks gestation for 48-72 hours
FOUR primary causes of preterm labor
- Premature activation of maternal HPA axis
- Exaggerated inflammatory response OR Infection
- Abruption (decidual hemorrhage)
- Pathological uterine distention
effects of increase ACTH during pregnancy
increased ACTH → increased cortisol → increased prostaglandins → cervical ripening/rupture of membranes
prolonged rupture of membranes
> 18 hours (RF for chorioamnionitis)
preterm rupture of membranes (pPROM) tx (before 36 weeks)
typically requires delivery by 34 weeks (avoid infection)
manage with steroids, abx (ampicillin, erythromycin), tocolysis,
erythroblastosis fetalis/fetal hydrops
Hyperdynamic state, heart failure, diffuse edema, ascites, pericardial effusion d/t serious anemia
MC RF for preeclampsia
nulliparity
Delivery threshold for women with preeclampsia
> 32 weeks