They are present in approximately 60 to 80 percent of people diagnosed with RA. Studies have found that, for many people, the antibodies precede the development of clinical symptoms by 5 to 10 years. If you have symptoms consistent with RA and a positive test for the antibody, an RA diagnosis is almost a certainty.Previously, seropositivity was defined in terms of an antibody called rheumatoid factor (RF).tudies have found that, for many people, the antibodies precede the development of clinical symptoms by 5 to 10 years. If you have symptoms consistent with RA and a positive test for the antibody, an RA diagnosis is almost a certainty.
Blood can be separated into two major components: Formed elements and Plasma. i. Blood cells or formed elements (about 45% of blood), which is composed mainly of. red blood cells (RBC) i.e. 99% of blood cells are RBC and the other 1% is white blood.
Composition of Blood Plasma. Blood Plasma is the straw colored liquid portion of the blood. 92% is composed of water and the rest 8% is made up of plasma proteins. It is mostly composed of dissolved proteins, mineral ions, glucose, clotting factors and carbon dioxide.uman blood is composed of two parts, viz, fluid and cellular. The fluid part is known as blood plasma that makes 55% of total blood volume and the rest comprises the cellular components or the formed elements. When a blood sample is centrifuged, it gets separated into different layers, based on their density.