LOINC display name : IgG clearance/Transferrin clearance (U S/P) [Ratio];
LOINC long common name : IgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma;
LOINC short name : IgG/Transf clear Ur SerPl-Rto;
LOINC description : The ratio of IgG to transferrin clearances, the selectivity index, is useful in the
diagnosis and management of proteinuria. Both IgG and transferrin levels are measured
in serum and urine and the selectivity index (SI) is calculated according to the formula
of Cameron and Blandford where SI (uIgG/sIgG)/(uTf/sTf) or (uIgG/sIgG * sTf/uTf).[PMID:
4161419] An index of below 0.1 is indicative of highly selective proteinuria.[PMID:
11012907];
Has component