Lactate Dehydrogenase (LD) Isoenzymes
Test Code: 001842
Performing Lab: LabCorp
CPT Code: 83615 001 83625 001
Synonym
Lactic Acid Dehydrogenase Isoenzymes; LD Isoenzymes; LDH Isoenzymes
Specimen Type
Serum
Specimen Container
Red-top tube or gel-barrier tube
Volume
2 mL
Minimum Volume
1 mL(NOTE: This volume does NOT allow for repeat testing.)
Specimen Handling
Separate serum from cells within 45 minutes of collection.
Patient Prep
Cardiac enzymes and isoenzymes are best interpreted as a sequential series. Typically, a series of three: one at admission (or initial event) and two more at six- to eight-hour intervals.
Unacceptable Conditions
Hemolysis; prolonged contact of serum with red cells; frozen specimen; specimen refrigerated more than three days after collection at time of testing
Temperature
Maintain specimen at room temperature. Do NOT freeze. Do NOT refrigerate for more than three days.
Methodology
Electrophoresis
Stability
Room Temperature: 7 days
Refrigerated: 3 days
Frozen: Unstable
Refrigerated: 3 days
Frozen: Unstable
| Result Code | Result Name | LOINC |
|---|---|---|
| 001115 | LDH | 14804-9 |
| 011866 | (LD) Fraction 1 | 2536-1 |
| 011874 | (LD) Fraction 2 | 2539-5 |
| 011882 | (LD) Fraction 3 | 2542-9 |
| 011890 | (LD) Fraction 4 | 2545-2 |
| 011908 | (LD) Fraction 5 | 2548-6 |
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