LDH Isoenzymes
Label Mnemonic: LDISO
Epic Lab Code: LAB3487
Downtime Form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mail-out Laboratory
5231 RCP
Collection Medium:
Red top tube 5 mL (Clot Activator)
Preferred Minimum: 1 mL serum
Absolute Minimum: 0.6 mL serum
Rejection Criteria:
Specimens collected with EDTA, potassium oxalate, or sodium fluoride anticoagulants. Frozen, refrigerated, or hemolyzed specimens.
Turn Around Time:
2 working days upon receipt at reference laboratory
Reference Range:
Components Reference Interval LD-1 14-27% of total LD-2 29-42% of total LD-3 18-30% of total LD-4 8-15% of total LD-5 6-23% of total Lactate Dehydrogenase, Total 0 up to 30 days: 200-465 U/L 30 days-17 mos: 200-450 U/L 18 mos-10 yrs: 165-430 U/L 11 yrs-16 yrs: 127-287 U/L 17 yrs & over: 105-230 U/L
Note: 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.
CPT Code:
83615 LD Total, 83625 LD Isoenzyme