Urea [Molar ratio] in Serum or Plasma --post dialysis/pre dialysis   77010-7

LOINC Code


LOINC code77010-7
nameUrea [Molar ratio] in Serum or Plasma --post dialysis/pre dialysis
descriptionThe urea reduction ratio (URR) is a measure of urea clearance during hemodialysis and is calculated based on pre- and post-hemodialysis measurements of blood urea. The URR is directly associated with survival for patients on chronic hemodialysis (a higher URR is associated with lower risk of mortality). Urea clearance is routinely recorded and used to monitor the adequacy of hemodialysis and to compare the quality of hemodialysis delivery across dialysis facilities. [PMID: 10727547]
statusACTIVE

Fully-Specified Name

componentUrea^post dialysis/pre dialysis
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.
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 nameUrea post/pre dialysis SerPl-sRto

Basic Attributes

classCHAL
type1  Laboratory
order vs. observationBoth
formula (readable)Urea reduction ratio = [1-(post-dialysis blood urea/pre-dialysis blood urea)]*100
example UCUM unitsmmol/mmol
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 unitmmol/mmol

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 updated2.52
last change typeMIN  - change to field other than name

Related Names

After
Before
CHEMISTRY.CHALLENGE TESTING
Dialy
p dialysis
Pl
Plasma
Plsm
Point in time
post/pre dialysis
PST
QNT
Quan
Quant
Quantitative
Random
Scrto
SerP
SerPl
SerPlas
Serum
Serum or plasma
SR
Substance concentration ratio
Substance ratio

Copyright © 2023 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2023, 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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