LOINCActiveBoth

LOINC Code 68452-2: LDH Pyruvate to lactate reaction (Syn fld) [Catalytic activity/Vol]

68452-2 is a LOINC code used to identify LDH Pyruvate to lactate reaction (Syn fld) [Catalytic activity/Vol] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Lactate dehydrogenase. It is commonly used with the system or sample type Synv fld.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Lactate dehydrogenase. It is commonly used with the system or sample type Synv fld.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both
  • Method: Reaction: pyruvate to lactate

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Lactate dehydrogenase [Enzymatic activity/volume] in Synovial fluid by Pyruvate to lactate reaction
  • Lactate dehydrogenase
  • 2-Hydroxypropanoic acid; 2-hydroxy-propionate; 2-hydroxy-propionic acid; Catalytic Concentration; Chemistry; Dehydrog; Dehyrdogenase; Joint aspirate; Joint fld; Joint flu; Joint fluid; L.D.H; Lact; Lactic acid; Lactic acid dehydrogenase; LD; LDH; L-lactate; L-lactate dehydrogenase; P to L; Point in time; QNT; Quan; Quant; Quantitative; Random; React; Rxn; SF; SNV; Syn; Syn fl; Synov; Synovial fluid; Tumor marker

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

LDH Pyruvate to lactate reaction (Syn fld) [Catalytic activity/Vol]Lactate dehydrogenase [Enzymatic activity/volume] in Synovial fluid by Pyruvate to lactate reactionLDH Snv P to L-cCncLactate dehydrogenaseCHEMLactate Dehydrogenase (LDH), Synovial fluidCCnc

Frequently asked questions

Code details

Code68452-2
SystemLOINC
Display nameLDH Pyruvate to lactate reaction (Syn fld) [Catalytic activity/Vol]
DescriptionLactate dehydrogenase
Short nameLDH Snv P to L-cCnc
ComponentLactate dehydrogenase
PropertyCCnc
TimingPt
System (specimen)Synv fld
ScaleQn
MethodReaction: pyruvate to lactate
ClassCHEM
Example unitsarb U/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.38
Last changed2.70

Consumer names

Lactate Dehydrogenase (LDH), Synovial fluid

Part names

Lactate dehydrogenaseCCncPtSynv fldQnReaction: pyruvate to lactateCatalytic ConcentrationPoint in time (spot)Synovial fluidReaction - pyruvate to lactate

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.