Reflotron cholesterol measurement evaluated as a screening technique

Area of Science:

• Clinical Chemistry
• Analytical Performance Evaluation
• Diagnostic Instrumentation

Background:

• Accurate cholesterol measurement is crucial for cardiovascular disease risk assessment.
• Point-of-care testing devices require rigorous analytical validation.
• The Boehringer Mannheim Diagnostics Reflotron analyzer is a widely used diagnostic instrument.

Purpose of the Study:

• To evaluate the analytical performance of the Reflotron analyzer for cholesterol determination.
• To assess the impact of different sample types and personnel training on measurement accuracy.
• To identify potential interferents affecting Reflotron cholesterol assay results.

Main Methods:

• Assessed within-day and between-day coefficients of variation (CVs) for whole blood, serum, and plasma.
• Evaluated performance using commercial quality-control materials.
• Investigated interference from heparin, hematocrit, bilirubin, hemoglobin, and triglycerides.
• Compared Reflotron results against the Ektachem procedure using samples analyzed by trained personnel and laymen.

Main Results:

• Achieved low coefficients of variation (CVs) for cholesterol measurements in whole blood, serum, and plasma (1.4%–2.6%).
• Demonstrated good comparability (r = 0.950–0.980) with the Ektachem method when analyzed by trained personnel and students.
• Observed decreased performance (r = 0.880) when both sample collection and analysis were performed by untrained laymen.

Conclusions:

• The Reflotron analyzer exhibits acceptable analytical performance for cholesterol measurement.
• Measurement accuracy is maintained with trained personnel, supporting its use in clinical settings.
• Careful sample handling and trained operators are essential for optimal Reflotron assay reliability.