ARUP's Laboratory Test Directory

Lactate Dehydrogenase, Isoenzymes : 0020413

Mnemonic: LDISO

Methodology: Enzymatic/Electrophoresis
Performed: Sun-Sat
Reported: 1-2 days
Specimen Required: Collect:  One 4 mL serum separator tube.

Transport:  1 mL serum at 2-8°C. (Min: 0.6 mL) Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  0.5 mL serum at 2-8°C. 

Remarks:  Do not freeze. Allow serum to clot completely at room temperature.  Separate serum from cells ASAP.

Unacceptable Conditions:  Frozen or hemolyzed specimens.  Specimens collected with EDTA, potassium oxalate, or sodium fluoride anticoagulants.

Stability:  After separation of cells: Ambient: 2 days; Refrigerated: 1 week; Frozen: Unacceptable
Reference Interval:
LD-1: 14-27%
LD-2: 29-42%
LD-3: 16-22%
LD-4: 8-15%
LD-5: 6-23%

Lactate Dehydrogenase, Total:
0 up to 30 days: 200-465 U/L
1-17 months: 200-450 U/L
18 months-10 years: 165-430 U/L
11-16 years: 127-287 U/L
17 years and older: 105-230 U/L 
Note: Hemolyzed samples and serum which has not been separated from cells, show elevated LD-1 and LD-2.  LD-4 and LD-5 are labile at low temperatures and are erroneously low in samples that have been frozen.
CPT Code(s): 83625 LD isoenzymes; 83615 Total LD
 
 

 

 

 
All ARUP Sites:        www.aruplab.com     ·     www.arupconsult.com     ·     www.arup.utah.edu     ·     www.childx.org     ·     www.utahblood.org