78962-8
LaboratoryIgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma
Definition
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]
LOINC 6-Axis Classification
Component
IgG clearance/Transferrin clearance
Property
Ratio
Time Aspect
Pt
System
Urine+Ser/Plas
Scale Type
Qn
Method Type
N/A
Details
Class
CHEM
Order/Observation
Both
Short Name
IgG/Transf clear Ur+SerPl-Rto
Display Name
IgG clearance/Transferrin clearance (U+S/P) [Ratio]
Related Names
Frequently Asked Questions
What is LOINC code 78962-8?
LOINC code 78962-8 identifies "IgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma". 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]
What does 78962-8 measure?
This code measures IgG clearance/Transferrin clearance in Urine+Ser/Plas. It belongs to the CHEM class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.