Heparin induced platelet IgG Ab in Serum or Plasma by Immunoassay   73818-7

LOINC Code


LOINC code73818-7
nameHeparin induced platelet IgG Ab in Serum or Plasma by Immunoassay
descriptionHeparin induced platelet (platelet factor 4, PF4) IgG antibodies are measured in optical density as part of an immunoassay. A OD value of >0.4 is considered an initial positive test. Additional heparin may be added to the patient's serum to determine percent inhibition by heparin (see LOINC 73817-9) and confirm a positive result.
statusACTIVE

Fully-Specified Name

componentPlatelet factor 4 heparin complex induced Ab.IgG
propertyOD  =  Optical Density
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.
systemSer/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
methodIA  =  Immunoassay:  Encompasses all immunoassays with a few exceptions, including Immune Blot and Immune Fluorescence, which were created based on historic usage.

Additional Names

short namePF4 heparin cmplx IgG SerPl IA

Basic Attributes

classSERO
type1  Laboratory
order vs. observationBoth
example UCUM units{OD_unit}
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 unitOD

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

test rank3357 of 2000 most commonly performed tests by labs in USA
first released
last updated2.73
last change typeMIN  - change to field other than name
change reasonChanged Component core from "Platelet factor 4 polyanion (PVS) complex" to "Platelet factor 4 heparin complex induced" to align the Component for the newer terms with the existing older terms (the meaning is the same).; The EIA method, which was always intended to cover more than just enzyme-linked immunoassay and whose display name for the long common name has always been Immunoassay, was renamed IA in order to eliminate ambiguity about whether the method has a broader meaning than just enzyme-linked immunoassay. Likewise, EIA.rapid was renamed IA.rapid. These changes were approved by the Laboratory LOINC Committee in June 2016.; Updated System from "Ser" to "Ser/Plas" since this test can be performed on either serum or plasma.

Related Names

ABS
Aby
Antby
Anti
Antibodies
Antibody
Autoantibodies
Autoantibody
Compx
EIA
ELFA
ELISA
Enzyme immunoassay
Fac
Fact
HAT
Hep
Hepar
Heparin associated thrombycytopenia
Heparin dependent antibodies
Heparin induced thromocytopenia
Heparn
HIT
HITA
IAA
Immune globulin G
Immunoglobulin G
MEIA
Optical density
PF
PF4
PF4 heparin cmplx
PF4-heparin Ab
PI-factor 4
Pl
Plasma
Platelet Ab.heparin induced
Platelet type heparin inactivator
Platelets
Platelt
Plsm
Plt
Point in time
QNT
Quan
Quant
Quantitative
Random
Serology
SerP
SerPl
SerPlas
Serum
Serum or plasma
SR
SUDS
Thrombocyte
Thrombocytes

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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