quiz 5 Flashcards
incidence in gen pop of: twinning?
monozygotic twins?
1 in 90;
1 in 250;
the perinatal morbidity in multifetal gestation is how many times higher than for a comparable singleton preg?
3-4
avg time of delivery of twin preg?
35wks
Dx of multiple gestation is usually made by?
U/S
in multiple gestation, periodic U/S are done approx every 4wks begining at about?
16wks
in what percent of twin gestations is each member of the twin pair in cephalic presentation at the beginning of labor
40
chorionicity can first be determined at what gestational age
9-10wks
bronchial asthma is encountered in what percent of preg pts
4-8
severe asthma is assoc w less than what percent FEV1 or peak flow?
60
pts w which cardiac disease is it best advised not to become preg?
uncorrected TOF
in nml pts, CO increases in preg by approx
40%
Sxs of NYHA class 1 ?
no cardiac decompensation or limitation of physical activity
Sxs of NYHA class 2?
no Sxs of cardiac decompensation at rest, minor limitations of physical activity
Sxs of NYHA class 3?
no Sxs of cardiac decompensation at rest, marked limitations of physical activity
Sxs of NYHA class 4?
Sxs of cardiac decompensation at rest, increased discomfort w any physical activity
fetuses of pts w fxnlly sign cardiac disease are at increased risk for ?
low birth weight
OB pts w cardiac disease are most likely to die in what period?
postpartum
characteristic of pts at increased risk for peripartum cardiomyopathy
Hx of preeclampsia
what percent of offspring of pts w Marfans will inherit the disease?
50
about this percent of pts w rheumatic HD have mitral stenosis
90
MOA of thiazides
decreased plasma vol and CO
MOA of methyldopa
false neurotransmission, CNS effect
MOA of nefedipine
Ca channel blocker
MOA of hydralazine
direct peripheral vasodilation
