ARUP's Laboratory Test Directory
| 0020413: Lactate Dehydrogenase, Isoenzymes |
| Test Mnemonic: LDISO | |
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Methodology: Enzymatic/Electrophoresis
Performed: Sun-Sat Reported: 1-2 days |
| Specimen Required: | |
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Collect: One 4 mL SST.
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 |
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| Reference Interval: |
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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 |