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Blood Types Nursing NCLEX Review

Blood types for nursing: As a nurse we must be familiar with the various blood types along with their compatibility. This is not only important for the NCLEX exam but the job!

In nursing we administer blood transfusions, but before we do this the patient must be typed and crossmatched. Therefore, the patient’s blood will be typed (are they O, A, B, or AB and what is their Rh factor, negative or positive?) and crossmatched with a donor. The donor’s blood must be compatible with the patient’s to prevent a transfusion reaction.

So in other words, as nurses we want to be familiar with ABO blood types and who can donate/receive from who!

Lecture on Blood Types

blood transfusions, nursing, nurse, responsibilities, nclexWhat is found in blood….that awesome red substance in our veins?

Plasma which contains:

  • Red blood cells (RBCs): helps carry oxygen throughout the body with the help of the protein hemoglobin and helps remove carbon dioxide from our body to be exhaled by the lungs.
  • Platelets: clotting helpers
  • White blood cells WBCs (lymphocytes, basophils, eosinophils, monocytes, neutrophils): immune helpers

There are 8 total blood types from four different blood groups (A, B, AB, O).

How are there eight types? Patients can be A+ or A-, B+ or B-, AB+ or AB- and so forth. The positive or negative part comes from the Rh factor, which is discussed in depth below.

To understand the different blood types and who can donate/receive from who you MUST understand the concept of ANTIGENS and ANTIBODIES. Antigens are found on the red blood cell’s surface and antibodies are found in the plasma surrounding the red blood cells.

type a blood, compatibility, type b blood, antigens, antibodies

Antigens: can be present or absent on the surface of RBC.

All RBCs have them EXCEPT Type O RBCs. These are proteins that can elicit an immune response when they come into contact with its corresponding antibody. So in short, they stimulate the antibodies in the plasma to defend the body.

Therefore, if you get the same RBC antigen and antibody together this will cause an IMMUNE RESPONSE called agglutination. This is where the RBCs will glue together (hence clump together) and the donor’s red blood cells will lysis. This is known as a hemolytic transfusion reaction.  Therefore, you have to watch what antibodies are present in a patient’s blood compared to the type of antigens present on the surface of the RBC from the donor.

Antibodies: protect our body from invaders. All blood types have antibodies present in their plasma EXCEPT Type AB.

They are found in the plasma surrounding the RBCs. Again, the recipient’s plasma antibodies must be the opposite of what type of antigen is found on the donor’s red blood cell. If they are the same it will lead to a transfusion reaction.

Now let’s dissect each group and see who can donor and receive from who:

ABO Blood Groups and Types

A blood type: has only A antigens on its surface but B antibodies in the plasma

abo blood groups, nursing, nclex, type a blood

  • Donates to: A and AB
  • Recipient of: O and A

B blood type: has only B antigens on its surface but A antibodies in the plasma

abo blood groups, nursing, nclex, type b blood

  • Donates to: B and AB
  • Recipient of: O and B

AB blood type: has both A and B antigens on its surface but NO antibodies in the plasma

abo blood groups, nursing, nclex, type ab blood

  • Donates to: AB
  • Recipient of: O, A, B, and AB
  • UNIVERSAL RECIPIENT

O blood type: has NO antigens on its surface but has A and B antibodies in the plasma

abo blood groups, nursing, nclex, type o blood

  • Donates to: O, A, B, AB
  • Recipient of: O
  • UNIVERSAL DONOR

Rh Factor

What is Rh factor? In simple, these factors are either found on the surface of a red blood cell or not. Either a person has them or they don’t!

If the factors are present on the RBC, the person is Rh POSITIVE. If the factors are absent on the RBC, the person is Rh NEGATIVE.

Example: A+ (has factors present) or A- (no factors present)

IMPORTANT! If a patient is Rh positive they can receive either Rh+ or RH- blood. On the other hand, if a patient is Rh negative patients they can receive only receive Rh- blood.

Quick Quiz:

  1. A patient is A+. What blood can they receive?

Answer: A+, A-, O+, O-

  1. A patient is A-. What blood can they receive?

Answer: A- and O-

You may be interested in: Blood types NCLEX Questions

References:

Basics | Blood Safety | CDC. Cdc.gov. Retrieved 13 March 2018, from https://www.cdc.gov/bloodsafety/basics.html

 NCI Dictionary of Cancer Terms. National Cancer Institute. Retrieved 13 March 2018, from https://www.cancer.gov/publications/dictionaries/cancer-terms/def/abo-blood-group-system

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