Synonyms
- Alpha-Lipoprotein Cholesterol
- HDL Cholesterol
- HDL Cholesterol Electrophoresis
- HDLC
Expected Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Information
Related Documents
Specimen Requirements
Specimen
Serum (preferred) or plasma
Volume
1 mL
Minimum Volume
0.7 mL (Note: This volume does not allow for repeat testing.)
Container
Red-top tube, gel-barrier tube, or green-top (lithium heparin) tube. Do not use oxalate, EDTA, or citrate plasma.
Collection
Separate serum or plasma from cells within 45 minutes of collection.
Storage Instructions
Maintain specimen at room temperature.1
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 3 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x2 |
Patient Preparation
Patient should be on a normal diet and maintain a stable weight for a week prior to testing. Any drugs should be discontinued for three to four weeks if possible. Test should not be performed until three months after a myocardial infarction or similar traumatic episode, such as severe infection or inflammation. Fasting is not necessary.
Causes for Rejection
Improper labeling
Test Details
Use
Monitoring of HDL-cholesterol in serum is of clinical importance since an inverse correlation exists between serum HDL-cholesterol concentrations and the risk of atherosclerotic disease. Elevated HDL-cholesterol concentrations are protective against coronary heart disease, while reduced HDL-cholesterol concentrations, particularly in conjunction with elevated triglycerides, increase the cardiovascular risk.2,3 Strategies have emerged for treating cardiovascular disease by increasing HDL-cholesterol levels.4,5
Methodology
Enzymatic
Reference Interval
>39 mg/dL
Additional Information
Total cholesterol and triglycerides are required as well for determination of lipid risk factors for coronary artery disease. These tests with HDL-C and LDL-C are the usual lipid profile. HDL-C is especially apt to be low in male subjects who are obese and sedentary, in those who smoke cigarettes, and in those who have diabetes mellitus. Uremia is also associated with lower HDL-C. Exercise, appropriate diet and moderate ethanol intake increase HDL-C.
HDL-C is useful with cholesterol in forecasting protection against coronary artery disease in the industrialized countries, possible because of ingestion of high fat diets.
Those at least risk for development of coronary arterial disease have low cholesterol, low triglycerides, and high HDL-C.
Factors contributing to decreased HDL-C include:
• Genetic factors: primary hypoalphalipoproteinemia6
• Cigarette smoking7
• Obesity7
• Hypertriglyceridemia7
• Lack of exercise
• Steroids − androgens, progestogens, anabolic
• Thiazides
• Beta-adrenergic blockers
• Probucol
• Neomycin
Footnotes
1. LabCorp internal studies.
2. Nauck M, Wiebe D, Warnick G. Measurement of high-density-lipoprotein. In: Rifai N, Warnick CR, Dominiczak MH, eds. Handbook of Lipoprotein Testing. 2nd ed. Washington, DC: AACC Press; 2001: 221-224.
3. Dominiczak M, McNamara J. The system of cardiovascular prevention. In: Rifai N, Warnick CR, Dominiczak MH, eds.Handbook of Lipoprotein Testing 2nd ed. Washington, DC: AACC Press; 2001:103-125.
4. Linsel-Nitschke P, Tall AR. HDL as a target in the treatment of atherosclerotic cardiovascular disease. Nat Rev Drug Discov. 2005 Mar; 4(3):193-205. 15738977
5. Ng DS. Treating low HDL−from bench to bedside. Clin Biochem. 2004 Aug; 37(8):649-659. 15302606
6. Third Report of the National Cholesterol Education Program (NCEP) Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III) Final Report. Circulation. 2002 Dec 17; 106(25):3143-3421. 12485966
7. Frohlich JJ, Pritchard PH. The clinical significance of serum high density lipoproteins. Clin Biochem. 1989 Dec; 22(16):417-423. 2692872
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 001925 | HDL Cholesterol | 2085-9 | 011817 | HDL Cholesterol | mg/dL | 2085-9 |
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