OB Flashcards
the yolk sac generally disappears by week __?
12
the term threatened abortion/miscarriage refers to
vaginal bleeding before 20 weeks
empty GS with a MSD of ____ on TV indicates ____
25mm, blighted ovum/anembryonic pregnancy
with a beta of _______ the IUP should be seen on TV ultrasound
1500-2500
with a beta of _______ the IUP should be seen on TA ultrasound
6500
normal cephalic index
80
____ results in a lower cephalic index, ____ results in a greater cephalic index
dolicocephaly, brachycephaly
a Breus mole referes to..
a massive subchorionic thrombosis
a short umbilical cord is associated with
limb-body wall complex
body stalk anomaly describes
complete absence of the umbilical cord
most specific sign for true knot in umbilical cord is
hanging noose sign
describe the “halo sign”
with fetal demise, edema surrounding skull
which clefting combination is most likely the result of a chromosomal abnormality
Cleft lip and cleft palate (cleft lip can often be independant of chromosomal abn)
the fleshy protrusion in the face associated with holoprosencephaly is called
proboscis
SF absent ACC
teardrop ventricles (colpocephaly), high riding 3rd ventricle, sunburst appearance of sulci and gyri,
teardrop ventricles, banada cerebellum, lemon head, small 3rd ventricle - are all SF of which malformation?
arnold chiari 2
describe the measurements of normal, mild and severe ventriculomegaly
10mm, 10-15mm, >15mm
aqueduct of sylvius connects..
the 3rd and 4th ventricle
_____ is the m/c cause of ventriculomegaly/hydrocephaly
aqueduct stenosis
the risk of caudal regression syndrome is highly increased with
maternal diabetes
a highly active fetus is probably associated with..?
meroanencephaly
which side is most common for congenital diaphragmatic hernia
left
why does gastroscisis have a better prognosis than omphalocele?
because it is rarely associated with other abnormalities (other than bowl malformations)
the most common form of cyanotic heart disease
tetralogy of fallot
hyperthyroidism increases the risk of which abnormality?
craniosynostosis
cephaloceles are a common finding with which syndrome?
meckel gruber
m/c intracranial tumour
teratomas
a finding of vein of galen aneurysm indicates the probable finding of?
hydrops
m/c cause of hypertelorism
front cephalocele
m/c cause of hypotelorism
holoprosencephaly and Tri 13
micrognathia can be seen with
Tri 13, 18
cystic hygroma m/c found with
turner’s
the dominant form of achondroplasia
heterozygous
rhizomelia is
short proximal limbs
a compressible skull is seen with
osteogenesis imperfecta
telephone receiver bones are seen with
thanatophoric dysplasia
shortening of the entire limb is called
micromelia
shortening of the distal limb is
acromelia
another word for club foot
talipe equinovarus
lung maturity indicator
distal femoral epiphysis (secondary ossification site) measures >/=3mm and the proximal tibial epiphysis is visible
most skeletal dysplasias are mainly associated with micromelia, except ____ which is associated with rhizomelia
achondroplasia
difference between achondrogenesis and thanatophoric dysplasia
achondrogenesis has short trunk, thanatophoric dysplasia has normal trunk
to rule out all forms of holoprosencephaly
see the CSP
parents of normal stature result in
thanatophoric dysplasia
compressible skull can be seen with
OI 2, and hypophosphatasia
difference between OI 2, and hypophosphatasia
hypophos - rarely fractures
campomelic dysplasia is usually lethal with
tracheomalacia
persistent hand clenching is seen with
T18
polydactyly next to the thumb
preaxial
polydactyly next to the pinky
post axial
lobster claw hand
ectrodactyly
m/c pathology of lower limb
club foot
rockerbottom foot ax with
T18
hypoplastic left heart
ax with turners in females, the most common cause of cardiac death in a neonate
tricuspid regurgitation is seen with
ebsteins anomaly
tetralogy of fallot
overriding aorta, VSD, pulmonary stenosis, right ventricle hypertrophy
CCAMs get their blood from
pulmonary circulation
omphaloceles are ax with which disorders?
beckwith wiedmeann, turners, tri 13, 18
cloacal extrophy
OEIS complex: omphalocele, extrophy bladder, imperforate ANUS, spina bifida
meckel gruber associated with
microcephaly, occipital cephalocele, polycystic kidneys, polydactyly (think MOPP)
week range for amniocentesis
14-20
week range for CVS
9-12
tricuspid and pulmonary trunk atresia is found with
hypoplastic right heart
mitral valve and aorta atresia is found with
hypoplastic left heart
