Hemathology Tests Flashcards
Hematology tests
Are used to examine blood and blood components to determine if they are within normal limits
Hematology
The study of blood, blood diseases, and organs that form blood
Blood type test
Is performed to test for blood compatibility for a blood transfusion, organ transplant, and to test if a woman is pregnant is RH positive or negative
How is blood identified?
By antigens
What are antigens?
Specific proteins on the surface of red blood cells
What are the two major groups of antigens?
Blood group antigens (ABO) and RH antigen
Type A (blood group antigen)
Has the A antigen and the antibodies in plasma against B antigen
Type B (blood group antigen)
Has the B antigen and antibodies in plasma against A antigen
Type O (blood group antigen)
Has neither the A or the B antigen and antibodies in plasma against A antigen and B antigen
Type AB (blood group antigen)
Has the A antigen and the B antigen and no anti bodies against A antigen and B antigen
RH positive
The RH is present on the red blood cell surface
RH negative
The RH antigen is not present on the red blood cells
Partial thromboplastin time test
Assesses the blood’s ability to clot and is commonly performed before an invasive surgery. It also can be used to measure the effectiveness of the dose of heparin administered to the patient to prevent the formation of clots or to assess for hemophilia and lupus anticoagulant syndrome or antiphospholipid antibody syndrome caused when the anti bodies attack blood clotting factors.
How many blood clotting factors are activated when bleeding occurs?
12
