Evaluation of reference ranges for fatty acids in serum

Area of Science:

• Clinical Nutrition
• Biochemistry
• Analytical Chemistry

Background:

• Long-chain fatty acid fractionation is vital for managing patients on total parenteral nutrition (TPN).
• Clinicians require absolute concentration reference ranges for accurate fatty acid status monitoring in TPN patients.
• Existing reference ranges are often percentage-based and calculated parametrically, which may not suit non-Gaussian fatty acid distributions.

Purpose of the Study:

• To establish non-parametric reference ranges for serum fatty acid concentrations.
• To provide accurate monitoring tools for clinicians managing TPN patients.
• To address the limitations of existing percentage-based and parametric reference range calculations.

Main Methods:

• Serum samples from 130 healthy blood donors were analyzed.
• Gas-liquid chromatography was employed to measure total fatty acids.
• Fatty acid results were calculated as both absolute concentrations and percentages of total fatty acids.

Main Results:

• Established reference ranges for individual serum fatty acids.
• Demonstrated the necessity of non-parametric methods for accurate range calculation due to non-Gaussian distributions.
• Provided data for both concentration and percentage values for each fatty acid.

Conclusions:

• Non-parametric reference ranges for serum fatty acid concentrations are essential for effective TPN patient management.
• The study provides a foundation for improved clinical monitoring of fatty acid status.
• Accurate reference ranges support better clinical decision-making in nutritional support.