Why it is said that people with blood type o are all purpose blood transfusions

Because blood type O can be given to people of any blood type without confrontation. The amount of blood transfused should not be too large.

A little blood transfusion to any other blood type will not be rejected by the immune system.

Blood type O is not a "one-size-fits-all transfusion".

Often, people are accustomed to calling blood type O universal blood and thinking that blood type O can be transfused to any other blood type, but this is inaccurate! The so-called "panacea" of blood type O is only for the red blood cells of blood type O, and it can be transfused to patients with types A, B, and AB. However, the plasma of type O blood contains anti-A and anti-B antibodies, and excessive transfusion to heteroblood patients can also cause adverse reactions in the body of blood transfusions.

The human ABO blood group system is the first blood group system to be discovered, and it is the most important blood group system because of its regular blood group antibodies, which are divided into types A, B, O and AB4. Of these, only people with type O lack the A and B antigens on their red blood cells, so such cells can be transfused to people with types A, B, and AB. Therefore, when it is difficult to identify the ABO blood group of the recipient, the blood type O washed red blood cells can be transfused; In addition, when there is insufficient or lack of blood of the same type at the critical moment of life-saving, a small amount of blood type O can also be transfused to relieve the urgent need.

However, plasma type O contains anti-A and anti-B antibodies, which can sensitize or agglutinate type A, B, and AB red blood cells, shorten their lifespan or destroy them immediately, and are contraindicated for blood transfusion. Therefore, type O whole blood was once called "dangerous universal blood". Some people ignore the word "dangerous" and call type O blood "universal blood", which is wrong.

In the case of a small amount of heterotypic blood transfusion, if 1 unit of type O whole blood is transfused to a person with type A, the anti-A and anti-B in the plasma of type O are less sensitized to the red blood cells of the recipient due to the dilution of the plasma of the recipient, and the shortening of the red blood cells of the recipient is not noticed. As the volume of atypic transfusion increases, this contraindication to blood transfusion gradually increases, and in severe cases, hemolytic transfusion reactions occur due to the destruction of red blood cells in the recipient. Therefore, in places with better medical conditions, component blood transfusion should be vigorously promoted, and atypic blood transfusion should no longer be used.

Of course, the view that type O whole blood is a universal blood should be corrected.

Type O is called universal transfusion, but because of the presence of anti-A and anti-B lectins in the serum of type O, it can cause hemolysis of red blood cells in the recipient.

Blood type O is a common blood group, which refers to blood that does not contain either a antigen or a B antigen. Blood type O has the longest history, appearing between 60,000 and 40,000 BC. People with blood type O have a unique personality, temperament, etc.

In addition, there is a movie in Thailand that is also called "blood type O".

Blood type O should not be transfused casually. Blood types can be divided into type O, type A, type B, and type AB. The type can also be divided into Rh-positive and Rh-negative.

For example, Rh-positive blood type O cannot be transfused to any Rh-negative blood type. Transfusions should only be given to any blood type that is positive for RH. Therefore, blood type O may not necessarily be transfused to anyone.

Because there are no A and B antigens on group O red blood cells, type O washed red blood cells can be transfused to patients with types A, B, and AB when the primary side is matched. However, if the plasma containing anti-A and anti-B in the plasma of type O blood is transfused into patients with types A, B, and AB, it will cause different degrees of immuno-hemolytic transfusion adverse reactions.

No, because type A blood has a A antigen, B antibody, type B blood has a B antigen, A antibody, and type O has a A and B antigen and no A and B antibodies. It was only in the earliest days that people mistakenly believed that the O-type was omnipotent.

Blood type O cannot be transfused to other people arbitrarily, and blood transfusion from other people should be accepted, and blood type O blood needs to be transfused according to the actual situation.

Because blood types can be divided into type O, type A, type B, and type AB. Type O, type A, type B, and type AB can also be divided into Rh-positive blood type and Rh-negative blood type. For example, if Rh type O is positive, you should not be transfused to any blood type that is Rh negative.

Only small amounts can be transfused to any blood type that is positive for Rh. Because there is no A antigen and B antigen on the surface of red blood cells of type O blood, red blood cells washed by type O blood can be transfused to patients with type A, B, and AB when the main side is matched.

However, if the plasma red blood cell preparation containing type O blood is transfused into the body of patients with type A, B and AB, it may lead to adverse reactions of different degrees of immunity and hemolytic transfusion in the recipient.

Answer]: Since the agglutination on the red blood cell membrane of the blood recipient is mainly considered when the blood transfusion collapses the source, the agglutinin in the serum of the recipient should not be agglutinated, so type O blood can be transfused to any blood type of the A, B, and O blood group system, which was once known as the "universal blood transfusion". Although there are no agglutines A and B on the red blood cells of type O blood, the serum contains agglutinins anti-A and anti-B, which can agglutinate with the agglutins on the red blood cells of different types of recipients, especially when the blood transfusion volume is large and the transfusion speed is too fast, so blood type O is not a universal blood transfusion.

People with type O can only receive blood with type O, and people with type O blood have neither type A nor B antigens on the surface of red blood cells. Serum produces antibodies to both antigens. Therefore, people with blood type O are all-fit blood donors. However, only blood from the same blood type will be accepted.

However, according to the current survey, blood type O cannot be transfused for people of all blood types, and people are now saying that it is a component transfusion, that is to say, blood type O can accept plasma of ABO blood, and the red blood cells in blood type O can accept any blood type.

However, there are anti-A and anti-B antibodies in blood type O, so if a person with blood type O is transfused to a person with type A, B, and AB, it is very likely that an antigen-antibody reaction will occur, causing a severe immune hemolytic reaction.

Generally speaking, people are transfused with the same type of blood, that is, people with type O blood are transfused to people with type O blood, and blood transfusions between heterotypic blood are only chosen when the situation is very urgent.