Lactate Dehydrogenase (LD), Total, Body Fluid

Abbrev Code:FLD   
Order Code:LAB188Order Name:Lactate Dehydrogenase Fluid
Synonyms:LDH Fluid; FLDP
Methodology:Roche: UV assay
Woodwinds: Lactate to pyruvate
CPT Codes: 83615 x1, 83651 x1
Turnaround Time:Performed and reported 24 hours/day.
Special Instructions:Indicate source of fluid on request form.
Associated Links:

Roche Go Live Schedule

Collection Instructions

Specimen:Body fluid
Optimal Volume:1.25 mL
Minimum\Peds Volume:0.2 mL
Container:Plastic leakproof container, sterile
Causes for Rejection:Hemolysis, refrigeration.

Processing and Shipping

Specimen Processing:Aliquot 1.25 mL, 0.2 mL minimum. Store at room temperature.
Shipping Instructions:Ship at room temperature.
Stability:Roche: To be determined by M Health Fairview.
Test Performed at or Referral Lab Chemistry  (Roche-Ridges, Roche-Southdale, Roche-UMMC East, Woodwinds)


Reference Range:No reference ranges have been established. This result should be interpreted in the context of the patient's clinical condition and compared to simultaneous measurement in the patient's blood. Pleural fluid/serum LD ratios: A ratio of greater than 0.6 indicates an exudate, a ratio less than 0.6 indicates a transudate. A pleural fluid LD more than two-thirds the normal upper limit for serum is indicative of an exudate. Any effusion with a high cell count or cell debris will have a high LD ratio.

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