The blood is highly complex, liquid tissue composed of loose cells or formed elements and plasma. By volume, the blood is 55% plasma, and the remaining 45% formed elements or corpuscles. The formed elements have a specific gravity of 1.09 as compared with 1.03 for the plasma, thus accounting for their separation by centrifugation.
Blood grouping is based on the presence or absence of specific antigens located on the surface of the red blood cells. When an individual has only one of the antigens, the blood group is called A or B, depending on which it is present. When both are present, the blood type is known as AB and when both the antigens are absent, the blood group is designated by the letter O to indicate zero.
RHOgam refers to Rho immunoglobulin. RHOgam is an injectable blood product used to protect an Rh-positive fetus from antibodies produced by its Rh-negative mother. The injections are given at about 28 weeks in the pregnancy and immediately after delivery. With these injections, Rh-negative women can have safe Rh-positive pregnancies.
No comments:
Post a Comment