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.
What is Rh positive and Rh negative mean? Rh factor is a protein that is found in the blood of about 85% of the population. Those who have the factor are Rh positive, while those who don't, are Rh negative. A person who is Rh negative can safely donate blood to persons with or without the protein. A person who is Rh positive can only donate to those who are Rh positive.