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Lactate Dehydrogenase, Isoenzymes
MessageLD-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.
Test Code
2142
Alias/See Also
Isoenzymes, LD; LD Isoenzymes
Preferred Specimen
Serum separator tube.
Minimum Volume
Room temperature.
Instructions
Do not refrigerate or freeze. Allow serum to clot completely at room temperature. Separate serum from cells ASAP and transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.6 mL)
Transport Temperature
Room temperature.
Specimen Stability
After separation of cells: Ambient: 1 week; Refrigerated: Unacceptable; Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimens collected with EDTA, potassium oxalate, or sodium fluoride anticoagulants. Frozen, refrigerated, or hemolyzed specimens.
Methodology
Enzymatic/Electrophoresis
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
