HDN maternal Flashcards
List tests ran on mother postpartum
- blood type
- Ab screen
- Ab ID
- FMH screen
KB
indication for FMH
Rh neg mom delivers Rh pos infant
indication for KB
pos FMH screen - quantify the hemorrhage to determine rhogam dosage
what are the next steps if Ab screen is positive
- Ab ID and titer
critical titer for anti-D
16-32
critical titer for anti - K
8
describe the Kleihaur Betke test
- quantitative test to determine extent of fetal bleed
- Fetal hgb is resistant to acidification
Kleihaur Betke % bleed equation
1) # fetal cells/# maternal cells = % bleed
2) %bleed * (5000mL/30 mL) = dose +1
which of the following antibody features reduces the risk of the antibody causing HDFN
- IgG
- compliment fixing
- low incident
- antigens present on the placenta
antigens present on the placenta
what does a positive reaction on a fetal screen test look like under the microscope
- stacked coins
- rosettes
- agglutination
- dark pink
rosettes
all of the following may be reasons for a positive DAT on cord cells of a newborn except:
- high concentration of wharton’s jelly on cord cells
- immune anti-A from an O mother on the cells of an A baby
- Immune anti - D from an Rh neg mother on the cells of an Rh pos baby
- immune anti - K form a K neg mother on the cells of a K neg baby
immune anti - K form a K neg mother on the cells of a K neg baby
a maternal patient experience a 2.5% bleed on her KB test. how many doses of rhogam does she require
5
rhogam is indicated for
- mothers who have anti- D
- mothers who have red cell antibodies
- infants who are Rh negative
- mother who is Rh negative
mothers who are Rh negative
a red cell unit for a transfusion to an infant must meet all of the following criteria except:
- crossmatch compatible with infants’ plasma
- sickle cell negative
- <7 days old
- CMV negative
crossmatch compatible with infants plasma
