Fluid Cholesterol
- Sample Type
- Standard
- Fasting
- No
- Unit
- mg/dL
Fluid Cholesterol measurement is utilized in Fluid Biochemical Analysis to differentiate between transudative and exudative effusions (pleural or ascitic). While Light's Criteria (using Protein and LDH) is the gold standard, Fluid Cholesterol is an excellent adjunct. Cholesterol levels in the fluid are higher in exudates because of increased capillary permeability and the breakdown of local cells (mesothelial cells and leukocytes). A threshold of >45 mg/dL is often used to identify exudates with high specificity.
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Why Context Matters
Serum cholesterol levels can influence fluid levels; in patients with extreme hyperlipidemia or severe malnutrition, the traditional cutoff values for fluid cholesterol may lead to misclassification of the effusion type.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Fluid Cholesterol:
Official Sources
- Cholesterol test - Mayo ClinicMayo Clinic
- Cholesterol Levels: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
- PubMed: Fluid Cholesterol Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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