Blood types/ transfusions

Question 1

what is the universal donor group

Answer 1

O - has anti-a and anti-b antibodies

Question 2

what is the universal recipient blood group

Answer 2

ab - no antibodies

Question 3

what are the natural antibodies (blood groups)

Answer 3

anti-a/ anti-b = anti-erythrocyte antibodies

Question 4

what is the optimum temperature of anti-erythrocyte antibodies

Answer 4

4 degrees - ‘cold’ antibodies’

Question 5

what is the optimum temperature of immune antibodies

Answer 5

37 degrees - warm

Question 6

what immunoglobulin can/ can’t cross placenta

Answer 6

IgM don’t, IgG can

Question 7

what does rhesus positive mean

Answer 7

D antigen present

Question 8

what is prevalence of rhesus negative

Answer 8

15%

Question 9

what happens in haemolytic disease of the foetus and newborn (HDFN)

Answer 9

rhesus negative mother had rhesus positive baby; 1st baby is fine but mother sensitised to rhesus positive blood - makes IgG anti-D; crosses placenta and haemolyses foetuses RBCs