5 Star Study Guide Flashcards
Which antibodies cause severe HDFN?
Anti-RhD; Anti-RhE; Anti-Kell (K1); Anti-Rhc
Which antibodies do not cause hemolytic disease?
LEWIS, l, Duffy (Fyb)
What is aneuploidy risk by maternal age (30, 35, 40, 45) for Down’s syndrome vs any chromosomal abnormality?
30: 1/1000 v 1/500
35: 1/365 v 1/180
40: 1/100 v 1/50
45: 1/36 v 1/18
(remember to cut the Down’s value in half)
When should you complete the nuchal translucency?
Between 11w0d and 13w6d
[CRL between 45 and 84mm]
Greater than what value for a nuchal translucency warrants further evaluation?
> 3mm
A large nuchal translucency is associated with what?
Down’s syndrome, Trisomy 18, Congenital heart disease/cardiac malformation (most commonly associated)
What crosses the placenta by simple diffusion?
Oxygen, CO2, electrolytes, ketones
What crosses the placenta by active transport?
Amino acids, calcium, phosphorous, iron
What crosses the placenta by facilitated diffusion?
Glucose, sucrose, fructose
What crosses the placenta by endocytosis?
IgG
What crosses the placenta by bulk flow?
Water
What crosses the placenta with carrier mediated transport?
Iodine
True or false: PTU crosses the placenta?
True
True or false: TRH crosses the placenta?
True
True or false: Iodine crosses the placenta?
True
True or false: Magnesium sulfate crosses the placenta?
True
True or false: long-acting thyroid stimulator crosses the placenta?
True. LATS is thought to be responsible for the hyperthyroidism in Graves disease
True or false: IgG crosses the placenta?
True
True or false: Propanalol crosses the placenta?
True
True or false: T3 crosses the placenta?
True
True or false: T4 crosses the placenta?
True
True or false: Heparin crosses the placenta?
False
True or false: Insulin crosses the placenta?
False
True or false: TSH crosses the placenta?
False