Lactate Dehydrogenase (LDH)

Label Mnemonic:	LD
Epic code:	LAB96
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Chemistry
6240 RCP
356-3527

Specimen(s):

Plasma

Collection Medium:

Plasma Separator Tube 4.5 mL

Alternate Collection Media:

Call laboratory for additional acceptable specimen collection containers.

Minimum:

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

Comments:

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.

Methodology:

UV Assay

CPT Code:

83615

See also:
Lactate Dehydrogenase (LDH)-Other, Body Fluid