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You are here : 3-RX.com > Medical Encyclopedia > Tests and Exams > Blood Typing: Results and Values

Blood Typing

Alternate Names : Cross Matching, Rh Typing, ABO Blood Typing

Blood Typing | Preparation & Expectations | Results and Values

What do the test results mean?

Forward typing means that:

  • Type A blood clots when mixed with anti-A serum.
  • Type B blood clots when mixed with anti-B serum.
  • Type AB blood clots when mixed with both anti-A and anti-B serums.
  • Type O blood does not clot when mixed with either anti-A or anti-B serum.
  • Rh-positive blood clots when mixed with anti-Rh serum.
  • Rh-negative blood does not clot when mixed with anti-Rh serum.
  • Reverse typing means that:

  • Serum from type A blood clots when mixed with type B blood.
  • Serum from type B cells clots when mixed with type A blood.
  • Serum from type O blood clots when mixed with type A and type B blood.
  • Serum from type AB blood does not clot when mixed with type A or type B blood.
  • What this means for transfusions:

  • Persons with type A blood can receive blood transfusions from donors with type A or type O blood.
  • Persons with type B blood can receive transfusions from donors with type B or type O blood.
  • Persons with type AB blood can receive transfusions from donors with type AB, type A, type B, or type O blood.
  • Persons with type O blood can receive transfusions from persons with type O blood.
  • Persons with Rh-positive blood can receive transfusions from donors with Rh-positive and Rh-negative blood.
  • Persons with Rh-negative blood can receive transfusions from donors with Rh-negative blood.

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    Blood Typing: Preparation & Expectations

     

    Author: David T. Moran, MD
    Reviewer: Adam Brochert, MD
    Date Reviewed: 09/20/01



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