Rh blood group system, which means rhesus monkey blood group system, is a human blood group system, which is divided into negative and positive. When a person's red blood cells have blood group D substances (antigens), it is called Rh positive, which is expressed by Rh(+); When the D antigen is missing, it is Rh negative, which is expressed by Rh(-).
Most people are positive. Rh system is probably the most complicated system in red blood cell blood group, and its importance is second only to ABO system. The ratio of Rh-positive and Rh-negative blood groups varies from race to race. Rh-positive blood group accounts for about 99.7% of Han nationality and most ethnic groups in China, and some ethnic minorities account for about 90%, such as Uighurs in Xinjiang.
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Rh blood group classification:
Rh+, called "Rh-positive" and "Rh-dominant", indicates that ethnic red blood cells have "Rh factor".
Rh-, called "Rh negative" and "Rh recessive", means that human red blood cells have no "Rh factor".
Rules for blood transfusion of type O blood:
You can't just lose type O blood to others. Blood types can be divided into O type, A type, B type and AB type. O type, A type, B type and AB type can also be divided into RH positive blood group and RH negative blood group.
For example, O type RH positive should not be lost to any RH negative blood type. Any RH-positive blood type can only transfuse a small amount of blood. Because there are no A antigens and B antigens on the surface of red blood cells of type O blood, patients with type A, type B and type AB can be infused with type O blood under the condition of major side matching.
However, there are anti-A antibodies and anti-B antibodies in the plasma of type O blood. If the plasma red blood cell preparation containing type O blood is imported into patients with type A, type B and type AB, it may lead to different degrees of immune and hemolytic transfusion adverse reactions.
References:
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References:
/baike.baidu.com/item/rh% E8% a1%80% e5% 9e% 8b% e7% b3% bb% e7% bb% 9f "target =" _ blank "title =" Baidu Encyclopedia -Rh Blood Group System "> Baidu Encyclopedia -Rh.