Cortisol Free [Mass/volume] in Serum or Plasma --PM trough specimen   57825-2

LOINC Code


LOINC code57825-2
nameCortisol Free [Mass/volume] in Serum or Plasma --PM trough specimen
descriptionIdentifies an evening specimen when free cortisol is at its lowest point in a circadian cycle -often considered to be midnight. Some laboratories will call this "12AM (midnight)" specimen, but specimens in the range of 11PM to 1AM are acceptable. The trough time may have to be adjusted for patients on different work shifts because their circadian rhythms can shift with their sleeping time.
statusACTIVE

Fully-Specified Name

componentCortisol.free^PM trough specimen
propertyMCnc  =  Mass Concentration
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
method

Additional Names

short nameCortis F PM SerPl-mCnc

Basic Attributes

classCHEM
type1  Laboratory
order vs. observationBoth
example UCUM unitsug/dL
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 unitug/dL

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 rank19144 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 reasonTo avoid two ways (PM and evening) of saying the same thing. We chose PM because it is shorter. 'Trough' clarifies that specimen is collected when cortisol is expected to be at the lowest level.

Related Names

12 AM
12AM
17-Hydroxycorticosterone
Chemistry
circadian low
Compound F
Coritsol
Cort
Cortis F
Evening
F
FR
hydrocortisone
late night specimen
Level
Mass concentration
Midnight
Non-protein bound
Pl
Plasma
Plsm
PM diurnal trough
Point in time
Pre
Predose
Pre-dose
QNT
Quan
Quant
Quantitative
Random
SerP
SerPl
SerPlas
Serum
Serum or plasma
Spec
SR

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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