LD Isoenzymes


Sunquest Code:LDISO  
Epic Code:LAB6058Epic Name:LD Isoenzymes
Synonyms:Lactate Dehydrogenase Isoenzymes
Methodology:Enzymatic/Electrophoresis
CPT Code:83625
Turnaround Time:Specimens are sent to the reference laboratory Mon-Sat; results are reported in 1-2 days.
Special Instructions:LD-1 and LD-2 are elevated in hemolyzed specimens and serum which has not been separated from cells. LD-3, LD-4 and LD-5 are labile at low temperatures and are erroneously low in specimens that have been refrigerated or frozen.


Collection Instructions

Specimen:Blood
Optimal Volume:2 mL
Minimum\Peds Volume:1.4 mL
Container:Red or gold (gel) (Red (no gel))
Causes for Rejection:Frozen, refrigerated or hemolyzed specimens.


Processing and Shipping

Specimen Processing:Separate serum from cells ASAP. Centrifuge and aliquot 1 mL, 0.6 mL minimum. Store at room temperature.
Shipping Instructions:Ship at room temperature.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:20413 (LDISO)


Interpretive

Reference Range:

 

LD-1:       14-27%

LD-2:       29-42%

LD-3:       18-30%

LD-4:       8-15%

LD-5:       6-23%

 

Lactate Dehydrogenase, Total

Age

U/L

0-30 days

200-465

1-17 mo

200-450

18 mo- 10 y

165-430

11-16 y

127-287

17 y and older

105-230

 

 



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