triglycerides (TGs)
المؤلف:
Kathleen Deska Pagana, Timothy J. Pagana, Theresa Noel Pagana.
المصدر:
Mosbys diagnostic and laboratory test reference
الجزء والصفحة:
15th edition , p897-898
2025-09-24
327
Type of test Blood
Normal findings
Adult/elderly
Male: 40-160 mg/dL or 0.45-1.81 mmol/L (SI units)
Female: 35-135 mg/dL or 0.40-1.52 mmol/L (SI units)
Child/adolescent
Possible critical values
> 400 mg/Dl
Test explanation and related physiology
TGs are a form of fat that exists in the bloodstream. They are transported by very-low-density lipoproteins (VLDLs) and low-density lipoproteins (LDLs). TGs are produced in the liver by using glycerol and other fatty acids as building blocks. TGs act as a storage source for energy. When TG levels in the blood are in excess, TGs are deposited into the fatty tissues. TGs are a part of a lipid profile that also evaluates cholesterol and lipoproteins. A lipid profile is performed to assess the risk of coronary and vascular disease.
Interfering factors
• Ingestion of fatty meals may cause increased TG levels.
• Ingestion of alcohol may cause increased levels.
• Pregnancy may cause increased levels.
* Drugs that may cause increased TG levels include cholestyramine, estrogens, and oral contraceptives.
* Drugs that may cause decreased levels include ascorbic acid, asparaginase, clofibrate, colestipol, fibrates, and statins.
Procedure and patient care
• See inside front cover for Routine Blood Testing.
• Fasting: yes (12-14 hours)
• Blood tube commonly used: red
* Tell the patient to avoid alcohol for 24 hours before the test.
* Inform the patient that dietary indiscretion for as long as 2 weeks before this test will influence results.
• Mark the patient’s age and gender on the laboratory slip. Instruct the patient with increased TG levels regarding diet, exercise, and appropriate weight.
Abnormal findings
Increased levels
- Glycogen storage disease
- Hyperlipidemias
- Hypothyroidism
- High-carbohydrate diet
- Poorly controlled diabetes
- Risk of arteriosclerotic occlusive coronary disease and peripheral vascular disease
- Nephrotic syndrome
- Hypertension
- Alcoholic cirrhosis
- Pregnancy
- Myocardial infarction
Decreased levels
- Malabsorption syndrome
- Malnutrition
- Hyperthyroidism
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