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|Performed by||Parnassus, Mission Bay & Mt. Zion Chemistry|
|In House Availability||Test available 24 hours per day 7 days per week|
|Method||Direct method w/detergent solubilization and w/ cholesterol esterase and oxidase|
|Patient Preparation||Patient should fast for 9-12 hours prior to collection if ordered as part of lipid panel.|
|Container type||Gold top or Light Green top|
|Amount to Collect||1 mL blood|
|Sample type||Serum or plasma|
|Preferred volume||0.5 mL serum or plasma|
|Min. Volume||0.2 mL serum or plasma|
|Normal range|| HDL Cholesterol:
|Synonyms||High density lipoprotien; HDL cholesterol; Coronary risk panel|
|Stability||Room temperature 8 hours, refrigerated 2 days, frozen at -20C 1 week|
|Turn around times||4 hours|
|Additional information||To convert mg/dL to mmol/L (SI units) multiply by 0.0259.
Recommended values are for > 18 year oldS (recommendations for children will be published at a future date).
NOTE: The HDL result may be falsely elevated when triglyceride levels exceed 400 mg/dL. The current HDL assay (Beckman LX20) may produce falsely suppressed HDL results of < 5 mg/dl in approximately 10% of patients with monoclonal proteins. Estimating the risk of atherosclerotic heart disease from the ratio of total/HDL cholesterol is no longer recommended by many experts, who believe that HDL cholesterol is most useful when employed as part of the assay for LDL Cholesterol rather than by itself. Others believe that the ratio of total/HDL cholesterol may better predict coronary risk (high risk males: > 6.0-7.0; high risk females: > 5.6-6.0). Still others believe that the most useful measurement is perhaps non-HDL Cholesterol ( [Total Cholesterol] - [HDL Cholesterol] ), the cholesterol in all lipoprotein particles containing apolipoprotein B, including VLDL. The measurement of non-HDL Cholesterol does not require fasting and does not rely upon assumptions of the Friedewald formula.
|Last Updated||1/28/2015 9:55:56 AM|
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