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LDL, Direct
MessagePerforming Lab: Central Lab, Lakeview, Sartell
Test Code
4523
Alias/See Also
Sunquest: LDLDR; LDL Measured, LDL reflex from LIPDR
CPT Codes
83721
Preferred Specimen
100 uL Lithium Heparin Plasma (light green-top) tube
Minimum Volume
10 uL (does not include dead volume)
Other Acceptable Specimens
Serum separator (gold-top), Lithium Heparin (light green-top) on ICE, Red, Red/Gray
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: Not recommended
Refrigerated: < 5 days
Frozen: < 3 months at -20 C
Refrigerated: < 5 days
Frozen: < 3 months at -20 C
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross Hemolysis
Methodology
Measured Liquid Selective Detergent
Setup Schedule
Hospital: Daily
Clinics: Monday - Friday
Clinics: Monday - Friday
Report Available
Same day
Reference Range
Normal: < 130 mg/dL
Clinical Significance
Total LDL and HDL cholesterol, in conjunction with a triglyceride determination, provide valuable information for the risk of coronary artery disease. Total serum cholesterol analysis is useful in the diagnosis of hyperlipoproteinemia, atherosclerosis, hepatic and thyroid diseases. HDL cholesterol levels are inversely related to the risk for cardiovascular disease.
