LACTIC DEHYDROGENASE (LDH) ISOENZYMES

Test Documentation
Components
Includes LD Isoenzyme 1, 2, 3, 4, 5, and LD Total

Specimen Required
Draw blood in a SST. Centrifuge, separate and send 2.0 mL serum (1.0 mL minimum) room temperature in a screw-capped plastic vial.

Alternate Specimen
Serum: Red-top

Rejection Criteria
Hemolyzed, lipemic or icteric specimens

Methodology
Agarose Electrophoresis, Kinetic Spectrophotometry

Stability
Room Temperature: 7 days; Refrigerated: Unacceptable; Frozen: Unacceptable

Reference Range
LD1:   16-32%  
LD2:   29-42%  
LD3:   17-27%  
LD4:   6-13%  
LD5:   3-17%  
LD Total:   By report  

Performed
Monday, Thursday

Turnaround Time3-5 days
Test CodeLDHIS
CPT-4 Code (s)
83625, 83615
LOINC Codes
LD1   2536-1  
LD2   2539-5  
LD3   2542-9  
LD4   2545-2  
LD5   2548-6  
LD Total   2532-0  

Warde
Medical
Laboratory