| Ordering Code | 194 |
|---|---|
| Test Name | LDH, Total |
| Alias | Lactate Dehydrogenase LD LDH |
| Preferred Specimen | Serum |
| Preferred Container | SST (Gold) |
| Other Specimen/Container | Serum in Plain (Red), Plasma in Lithium Heparin (Green-PST), Plasma in Lithium Heparin (Dark Green-PP No Gel) |
| Optimum Volume | 1 mL |
| Handling Instructions | All specimen types must be centrifuged within 2 hours of collection. If no gel separation present in tube and testing is delayed, plasma/serum is aliquoted from cells within 2 hours of collection. |
| Transport Requirements | Oahu: Ambient Airline: Ambient |
| Specimen Stability | Ambient: 7 Days Refrigerated: 4 Days Frozen: 6 Weeks Frozen samples should be thawed only once In connection with certain diseases (e.g. hepatopathy, disease of the skeletal muscles, malignant tumors), the LDH-4 and LDH-5 isoenzymes portions are increased and unstable in cooled and frozen samples this may lead to incorrect LDH values in patients suffering from such diseases. |
| Rejection Criteria | Hemolyzed, Insufficient quantity, Specimen older than stability limits |
| Avail. Stat | YES |
| Analytic Time | 1 Day |
| Methodology | Lactate-Pyruvate (NAD) |
Reference range(s)
The reference ranges listed below are valid on this date of August 15, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| LDH, Total | >=15Y | 130-250 | 130-250 | U/L | |||||
| LDH, Total | 9Y-14Y | 170-283 | 157-272 | U/L | |||||
| LDH, Total | 12M-9Y | 192-321 | 192-321 | U/L | |||||
| LDH, Total | 2W-12M | 163-452 | 163-452 | U/L | |||||
| LDH, Total | 0-2W | 309-1222 | 309-1222 | U/L |