Meaning of Rhesus

what is Rhesus:

Rhesus, known as the RH factor, is an antigen or protein in the red blood cells of certain people. Individuals who have this protein in its cells are RH + and those who do not possess the same are RH-.

The letters “RH” is the abbreviation of the term Rhesus, discovered in 1940 by the doctors Alexander Wiener and Karl Landsteiner, which identified this antigen in the blood of monkeys called macacus Rhesus observing that 85% of human blood behaved the same way in them and 15% in a different way.

System ABO is the system of classification of blood groups 4: “A”, “B”, “AB”, “O” and each one has an Antigen that differentiates them. Because the experiment with the macacus Rhesus discovered a group of antigens “D” which was called factors Rhesus or RH Factor, by which creates the vaccine Rhesuman or Rhogam that eliminates the anti-RH, which should be applied around 28 weeks of pregnancy and within 72 hours after childbirth to prevent Erythroblastosis fetalis disease or the death of the newborn be very serious can be blood transfusions in pregnancy.

By all of the above, it is important to monitor the presence of antibodies during pregnancy via blood tests, during the first quarter, the sixth, eighth and ninth month.

Disease RH

Hemolytic disease of the newborn born or perinatal is a blood disorder due to incompatibility between the RH of the mother and the fetus of RH, that is, when mother is RH – the child is RH + fetal RBCs can pass into the bloodstream of the mother through the placenta and immune it treats as a foreign substance RH + fetal cells and creates antibodies against them and may spend the fetus through the placenta and destroy the red blood cells of the same causing symptoms like: yellow color of the skin of the baby, whites of the eyes, low muscle tone, lethargy, among others.

In consequence of the above, should determine the blood group from both parents in order to apply the indicated treatment and prevent the disease above mentioned, or if necessary to perform transfusions or replace the blood of the baby, known as exchange transfusion, red blood cells and the Rh factor is negative to minimizing the damage that can cause the circulation of antibodies present in the blood flow to the baby RH.

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