simtics - Fetal Anomalies Flashcards
fetal brain is smooth until what gestational age
22 weeks
a small banana shaped cerebellum is associated with
spina bifida
most common fetal complication of maternal diabetes
macrosomia
The most common fetal cranial abnormality, often associated with hydrocephaly and spinal disorders
ventriculomegaly
a nuchal fold of 7 mm is considered
abnormally thick
The nuchal fold thickness is considered normal if under ___ mm between what weeks
5mm between 16 and 18 weeks
Nuchal translucency is measured between what weeks
11 and 13 weeks 6 days
Which urinary tract anomaly only occurs in males
posterior urethral valve obstruction
keyhole sign
seen in boys with posterior urethral valves. It refers to the appearance of the proximal urethra (which is dilated) and an associated thick-walled distended bladder
The fetus starts producing urine between
8 and 10 weeks of gestation
Physiological midgut herniation takes place between:
8 and 12 weeks gestational age
common cause of fetal liver enlargement
untreated isoimmunization
When scanning a fetus of 12 weeks, the bladder diameter is measured in the sagittal plane to be 35 mm. This finding can be described as
megacystitis
megacystitis once bladder exceeds ___ mm
7 mm
A congenital diaphragmatic hernia can cause
bilateral pulmonary hypoplasia
compression and reduction of the space available for the lungs
absence of an X chromosome in females causes what syndrome
turners syndrome
with down syndrome you will see ____ hCG and ____ inhibin A levels
higher hCG and low inhibin A
In the triple maternal serum screening test, the maternal blood levels of the following proteins are measured:
alpha fetoprotein, human chorionic gonadotrophin, estriol
sonographer observes the heart in the right chest, with the apex pointing to the right
dextrocardia
