Lactate Dehydrogenase (LDH)
Label Mnemonic: LD
Epic Lab Code: LAB96
Downtime Form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
6240 RCP
Collection Medium:
Plasma Separator Tube 4.5 mL
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
3 mL whole blood in light green top tube or ONE Microtainer® for pediatric patients.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
Adult Males 135-225 U/L Adult Females 135-214 U/L Pediatric Reference Ranges Male Female 0-31 days 125-735 U/L 145-765 U/L 31 days-1 year 170-450 190-420 1 year-4 years 155-345 165-395 4 years-7 years 155-345 135-345 7 years-10 years 145-300 140-280 10 years-13 years 120-290 120-260 13 years-16 years 120-290 100-275 16 years-19 years 105-235 105-230
Refer to BD Microtainer® Tubes product sheet for detailed sample collection instructions.

Avoid hemolysis. False elevations may occur in specimens which are not processed promptly to separate serum from RBC's.

This test is also performed in the Iowa River Landing (IRL) clinical laboratory (for specimens drawn at that site).
Test Limitations:
Criterion: recovery plus or minus 10% of initial values Plasma Icterus: No significant interference up to an I index of 60 (approximate conjugated and unconjugated bilirubin concentration: 60 mg/dL). Hemolysis: RBC contamination elevates results; interference if H index is greater than or equal to 50. Lipemia (Intralipid): No significant interference up to an L index of 900. There is poor correlation between turbidity and triglycerides concentration. Highly lipemic samples may cause ABS! flags.
UV Assay
CPT Code:
See also:
Lactate Dehydrogenase (LDH)-Other, Body Fluid