IgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma   78962-8

LOINC Code


LOINC code78962-8
nameIgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma
descriptionThe 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]
statusACTIVE

Fully-Specified Name

componentIgG clearance/Transferrin clearance
propertyRatio
timePt  =  Point in time:  To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements.
systemUrine+Ser/Plas
    Ser  =  Serum
    Plas  =  Plasma
scaleQn  =  Quantitative:  The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256
method

Additional Names

short nameIgG/Transf clear Ur+SerPl-Rto

Basic Attributes

classCHEM
type1  Laboratory
order vs. observationBoth
formula (readable)Selectivity index (SI) = (uIgG/sIgG)/(uTf/sTf)
example UCUM units{ratio}
The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org)
example unitratio

Associated Observations

LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations.

History/Usage

first released
last updated2.54
last change typeADD  - added

Related Names

Chemistry
Cl
Clear
Clearanc
Clearances
Clr
Immune globulin G
Immunoglobulin G
Pl
Plasma
Plsm
Point in time
QNT
Quan
Quant
Quantitative
Random
Ratios
Rto
SerP
SerPl
SerPlas
Serum
Serum or plasma
Siderophilin
SR
Tf
Transf clear
Trf
TRFRN
UA
UR
Ur+SerPl
Urn

Copyright © 2024 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2024, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.

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