The kit is used for quantitative determination of human blood fluid and urine samples in vitro β 2-microglobulin（ β 2-mg).

Renal function affects blood β The main factor of 2-mg concentration is available blood β 2-mg estimation of renal function, blood β It can reflect the primary glomerular function or secondary glomerular filtration function, such as Mg-2 β 2-mg increased; blood β 2-MG is a sensitive index reflecting renal function impairment in hypertension and diabetes mellitus. Long term hemodialysis β The increase of 2-mg is related to amyloidosis, amyloid osteoarthropathy and wrist syndrome; blood β 2-mg is helpful for dynamic observation and diagnosis of early renal transplantation rejection. blood β 2-mg is the main marker of lymphoproliferative diseases. Blood of patients with multiple myeloma and chronic lymphoid leukemia β The concentration of 2-mg increased significantly β The serum level of 2-mg can be used to evaluate the prognosis and therapeutic effect of myeloma. Human cytomegalovirus, EB virus, hepatitis B or hepatitis C virus and HIV infected blood. β 2-mg also increased. In autoimmune diseases, blood β 2-mg increased, especially in the active stage of systemic lupus erythematosus (SLE). 50% of patients with rheumatoid arthritis β 2-mg increased and was positively correlated with the number of joint involvement. At present, it is considered that the determination of blood β 2-mg can be used to evaluate the activity of autoimmune diseases and can be used as an index to observe the efficacy of drugs.