MFM Flashcards
Surveillance for monochorionic twins
Fetal echocardiogram indicated due to increased risk of congenital heart defects
Growth ultrasonography and fluid assessment should be performed every 4 weeks, and antenatal testing should commence at 32 weeks
Screening for twin-to-twin transfusion syndrome is initiated at 16 weeks then every 2 weeks thereafter
MOST commonly reported infectious cause of non-immune hydrops fetalis
Parvo
Hx indicated cerclage indications
History of ≥ 1 pregnancy loss in the second trimester related to painless cervical dilation without placental abruption or labor
Prior cerclage due to painless cervical dilation in the second trimester
Physical exam indicated cerclage criteria
Painless cervical dilation in the second trimester
US indicated cerclage criteria
Current singleton pregnancy
Prior spontaneous preterm birth < 34 weeks
Short cervical length < 25 mm prior to 24 weeks’ gestation
Characteristics of fetal alcohol syndrome
Growth restriction
Central nervous system abnormalities:
Abnormal reflexes and tone
Poor coordination and balance
Facial dysmorphisms:
Short palpebral fissures
Thin vermillion border
Smooth philtrum
How to dx antenatal fetal CMV infection
CMV DNA detection in amniotic fluid
risk factors for acute fatty liver
- fetal lnog-chain 3-hydroxyacyl CoA dehydrogenase deficiency (20%)
- hx AFLP
- multiple gestation
- preeclampsia or HELLP
- male fetus
- low BMI <20
when do you typically see acute fatty liver
3rd TM (rare PP)
lab findings of acute fatty liver: pathognomonic
low glucose
lab findings of acute fatty liver: elevated
bilirubin, SCr, WBC, ammonia, uric acid, PT INR, aPTT
- can have proteinuria
lab findings of acute fatty liver: LOW
glucose, coag inhibitors (ex/ antithrombin), Plt, fibrinogen
Swansea criteria is for
acute fatty liver
AFLP management
deliver within 24hrs
crit care support
treat hypoglycemia, coagulopathy
- most resolve after delivery 7-10d
- can have long term liver effects
vasa previa associated with *** placenta
abnormal placentation
> 90% previa, low-lying, bi-lobed, or succenturiate or PCI
What is the Apt test
test for fetal blood in maternal system
- looking for color change of blood when exposed to base (maternal dark, fetal minimally changed)
- fetal hemoglobin resistant to basic denaturation but adult is susceptible
diagnostic cervical CA procedures to do in preg
DO NOT doe endocervical curettage
DO:
Pap
Colpo
colpo with bx
Diagnostic conization indicated if confirmation of invasive dz will alter timing or mode of delivery
- if not, postpone until postpartum
cervical CA in preg management: pre-invasive CA
definitive tx PP
cervical CA in preg management: invasive CA + LN mets
immediate definitive tx, regardless of GA, including delivery
cervical CA in preg management: middle severity
depends on maternal preference and willingness to terminate pregnancy
cervical CA in preg management: microinvasive dz (stage 1A1)
diagnostic conization
- neg margins done
- pos margins, delivery by CD, repeat cone 6-8w
cervical CA in preg management: delivery mode - vaginal
Stage 1A1 and 1A2 with neg margins
- avoid epis
- everyone else CS
normal umbilcal artery pH
7.25-7.45
normal umbilical vein pH
preterm mean pH and BE
7.28, -2.5
umbilical artery pH for pathologic fetal acidemia
<7.00
more negative base deficit
associated with metabolic component
fetal blood gas: metabolic
low pH, low bicarb (higher base deficit (or more negative excess))
- long term
fetal blood gas: respiratory
low pH, normal bicarb (no deficit)
- acute