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Test Code 1108 Lactate Dehydrogenase, Body Fluid

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Enzymatic (Lactate to Pyruvate)

Literature References:

Package insert: Lactate dehydrogenase LDH IFCC reagent. Roche Corporation, 05/2015.

Specimen Requirements

Specimen Type: Pleural fluid, Ascites fluid, Pericardial fluid

Container/Tube: See Body Fluid Collection Guidelines under Special Instructions
Specimen Volume: 2 mL
Additional Information: Indicate fluid type on specimen container.

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: 2 to 4 hours after receipt in laboratory

Reference Values

Ratio of pleural to serum LD ≥ 0.6 is indicative of exudate and <0.6 of transudates.

Ratio of ascites to serum LD ≥ 0.6 is indicative of exudate and <0.6 of transudates.

Ratio of pericardial to serum LD ≥ 0.6 is indicative of exudates and transudates <0.6.


Literature References:

Balfe, Alan et al. The Biochemistry of Body Fluids. Association of Clinical Biochemists in Ireland. 1-35. October 2009.

Block, Darci R. Tietz Textbook of clinical Chemistry and Molecular Diagnositics. Elsevier Sixth Edition 2017. Body Fluids Abstract p. 925

Yataco, Jose C, Cleveland Clinic Journal of Medicine. Pleural effusions: Evaluation and Management. October 2005. Volume 72, Number 10.



Test Classification and CPT Coding


Additional Information

For BJH Laboratory Use Only
Analyte Stability:

Not established; performed upon receipt

Laboratory Processing Instructions:

Test performed in BJH Core lab. If specimen is received in a Vacutainer, check procedure to confirm suitability. Centrifuge upon receipt. Apply blue tape to the specimen aliquot tube. Deliver to the Cobas 8000. Completed specimen is stored frozen for 30 days. 

Specimen Transport Temperature


Special Instructions

LOINC Code Information


Fluid Type

Loinc code

Pleural Fluid


Ascites Fluid


Pericardial Fluid