A1 and A2 red cell

-) if you were asked to prepare 30mL of a 4% suspension of red cells in normal saline how many mL of cells would you need : 1.2 mL

-) in blood bank test whenever there is sensitization there should be agglutination : false

-) if a man plasma agglutination both A and B red cell he is group : AB

-) if all the crossmatches and screening cell are positive but the auto-control is negative the cause should be which of the following : mixture of antibodies and antibody to a high and low frequency antigen

-) decreasing the ionic strength will enhance agglutination : True

-) in blood bank test sensitization is a must for agglutination : True

-) a principle of the antiglobulin test is : antihuman globulin will react with human globulin molecule either bound to RBC or in serum

-) Rh sensitization is least likely to occur in a mating of an Rh negative woman and an Rh positive man when their blood group are : mother A , father O

) An ABO type on a patient gives the following

Reaction of patient cell with Anti-A positive , Anti-B positive , AntiA,B positive

Reaction of patient serum with Anti-A1 negative , A1 cell positive , B cell negative

The reaction above may be due to : patient is A2B with anti-A1

-) how much Nacl will be required to make up 6L of isotonic saline (0.9% w/v) : 54 g of Nacl

-) why do IgM antibodies , such as those formed against the ABO antigen have the ability to directly agglutinate red blood cell and cause visible agglutination : IgM antibodies are larger molecules and have the ability to bind more antigen

-) extravascular red cell destruction in commonly caused by antibodies of the : ABO blood group system

-) if a patient has a positive antiglobulin test should you perform a weak D test on the cells : yes , the immunoglobulin will not interfere with the test

-) platelets are stored at room temperature and may be kept for a maximum of : 5 days

) what is the main advantages of LISS saline media over other type of enhancement media such as albumin : selectively enhances or suppress certain blood group antigen – antibody reaction

-) an individual who is genotype AO , Lele , Sese will be : Le(a+b-)

-) the labels have come off of some of the testing reagent in you blood bank your technician is trying to find her anti-D and she asks you what color anti-D should be you reply : Yellow

-) why albumin is added to tubes of blood bank test before 37 c incubation : to reduce the zeta potential

-) a complete Rh typing for antigen C,c,D,E,e revealed negative result for C,D and E . how is the individual designated : Rh negative

-) the antigen in which of the following blood group system do not bind complement : the ABO group system

-) saline techniques are designed to detect : IgM antibodies

-) based on the following phenotypes which pair of cell would make the best screeing cell :