Fetal Soft Markers (lesson 28) Flashcards
What are the most common risks of Aneuploidy?
Increased nuchal thickness (>6mm)
Fetal ventriculomegaly (>10mm)
Hypoplastic/absent nasal bone
EIF
Choroid plexus cyst
Echogenic bowel
Shortened femur (femur/foot ratio)
What are the increased risk of non-chromosomal abnormalities?
Fetal pyelectasis/fetal renal pelvic dilatation
Single umbilical artery
Enlarged cisterna magna
What are the undefined soft markers?
Clenched fists
Rocker bottom feet
Sandal gap
Strawberry shaped skull
What is the measurement for nuchal fold thickness significance at 18-24 wks and 16-18 wks?
18-24 wks = 6mm or greater
16-18 wks = 5mm or greater
What is the nuchal index equation?
Nuchal thickness (mm) / BPD (mm)
What types of echogenic bowel are the worst?
Grade III is super bad, grade II is worth a note
What are the measurements to fall in the category of Mild Ventriculomegaly?
10-15mm
At what weeks gestation can CP cysts be found?
14 - 24 wks
How can an enlarged cisterna magna be falsely exaggereated?
A steep scan angle through the posterior fossa or dolichocephaly
What are the measurements that indicate a Mild Fetal Pyelectasis?
5mm - 10mm
What are normal measurements for Fetal Pyelectasis, and should it be reported?
Less than 5mm, and it should not be reported
What is the femur/foot ratio?
Ratio = femur/foot
What is a foot indicator of Aneuploidy and is often associated with Down Syndrome?
Sandal Toe/Gap
If a babe has absent nasal bone OR increased nuchal thickness OR echogenic bowel, what is the referral best suggested?
Medical Genetics Vancouver or Victoria
What is the referral pathway to Ventricuolomegaly?
DFS or Victoria MFM
