53399-2

LOINC Code


LOINC code53399-2
name
statusACTIVE

Fully-Specified Name

componentCitrulline/Tyrosine
propertySRto  =  Substance Ratio
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.
systemBld.dot  =  Blood filter paper
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 nameBlood; Chemistry; CIT; Citr; DBS; Dried blood spot; Filter paper; FP; Point in time; QNT; Quan; Quant; Quantitative; Random; Scrto; Substance concentration ratio; Substance ratio; Tyr; WB; Whole blood

Basic Attributes

classCHEM
type1  Laboratory
order vs. observationCitrulline/Tyr
example UCUM unitsmolar 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)

Member of these Panels

53261-4

History/Usage

first released
last updated2.73
last change typeMIN  - change to field other than name
change reason{Ratio}

Related Names

N
hierarchy paths
LOINC Home
   {component}   LP432695-7
      Laboratory   LP29693-6
         Chemistry and Chemistry - challenge   LP343631-0
            Chemistry - non-challenge   LP7786-9
               Amino acids   LP18033-8
                  Citrulline   LP15504-1
                     Citrulline | DBS | Chemistry - non-challenge   LP383838-2
LOINC Home
   {component}   LP432695-7
      Laboratory   LP29693-6
         Chemistry and Chemistry - challenge   LP343631-0
            Chemistry - non-challenge   LP7786-9
               Liver function (excluding enzymes)   LP31397-0
                  Citrulline   LP15504-1
                     Citrulline | DBS | Chemistry - non-challenge   LP383838-2

Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, 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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