be beside yourself. C2 If you are beside yourself with a particular feeling or emotion, it is so strong that it makes you almost out of control: He was beside himself with grief when she died. (Definition of âbe beside yourselfâ from the Cambridge Advanced Learnerâs Dictionary & Thesaurus Â© Cambridge University Press)
Rheumatoid Factor Test. The rheumatoid factor is an antibody present in the blood of many patients with rheumatoid arthritis. Doctors measure the level of rheumatoid factor by performing a blood test. A positive rheumatoid factor test means that the patientâs level of rheumatoid factor in their blood is considered high.
Rh is short for Rhesus factor. Rhesus factor is a type of antigen present on the surface of red blood cells. If you have have this particular antigen, you are Rh positive. If you donât, youâre Rh negative. The Rh factor is important in determining blood type for transfusions.Normally Your immune system protects against potentially harmful substances (antigens).When foreign antigens enter your body, your immune system makes antibodies to help destroy them.uring pregnancy a mother may be exposed to the Rh positive cells of her baby and develop antibodies to them. During a future pregnancy, these antibodies can destroy the red blood cells of an unborn child, leading to serious problems. If both parents are Rh-negative, they can only have Rh-negative offspring.