LIPOPROTEIN-CHOLESTEROL FRACTIONATION (CHOLESTEROL, HDL &
LDL, HIGH-DENSITY LIPOPROTEINS & LOW-DENSITY
LIPOPROTEINS)
Purpose of the test is to assess the risk of coronary-artery
disease.
Preparation:
Avoid exercise for 12 to 14 hours before the test. Eat a normal
diet for 2 weeks before the test. Don't eat any food or drink any
liquid for 12 hours before the test. Don't drink any alcohol for 24
hours before the test.
Time before test results available:
Test requires only a few minutes in the laboratory. Time before
results are reported to the doctor or patient varies from a few
minutes to a few days.
Normal values:
Desirable total blood cholesterol values below 200
Desireable LDL values below 130
The higher the percentage of HDL to total cholesterol the
better
What "high" or "increased" may indicate: High HDL generally
indicates a healthy state
High LDL generally indicates a higher-than-average risk for
developing coronary-artery disease
Taking these drugs may affect test results:
Cholestyramine
Clofibrate
Colestipol
Dextrothyroxine
Disulfiram
Estrogen
Gemifibrozil
Iodine
Miconazole
Niacin
Oral contraceptives
Phenothiazines (high doses)
Probucol
Salicylates
Vitamin A
Vitamin D
Other factors that may affect test results:
Alcohol
Any illness that occurs at the same time as the test, especially if
accompanied by fever
Recent surgery
Myocardial infarction
Presence of bilirubin, hemoglobin, salicylates, iodine, vitamins A
and D and some other substances in sample
Failure to follow diet restrictions and exercise
limitations
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