Preanalytics in urinalysis

Area of Science:

• Clinical Chemistry
• Laboratory Medicine
• Diagnostic Strategies

Background:

• Urinalysis offers vast diagnostic information.
• Technological advancements have improved urinalysis reproducibility.
• Preanalytical factors significantly impact diagnostic accuracy.

Purpose of the Study:

• To emphasize the critical role of standardized preanalytical procedures in urinalysis.
• To highlight the impact of patient-collected samples on preanalytical variability.
• To provide recommendations for optimizing urine sample handling and analysis.

Main Methods:

• Review of current urinalysis procedures and technological progress.
• Identification of common preanalytical errors in urine collection and transport.
• Discussion of strategies to correct for preanalytical variations, such as diuresis.

Main Results:

• Urinalysis is highly sensitive to preanalytical issues, particularly with patient-collected specimens.
• Standardized collection, transport, and sample preparation are essential for effective urinalysis.
• Technological improvements necessitate stricter preanalytical requirements.

Conclusions:

• Optimized preanalytical conditions are fundamental for reliable urinalysis.
• Splitting samples and using appropriate preservatives can mitigate contamination and analyte degradation.
• Adherence to strict preanalytical protocols is vital for both routine and advanced urinalysis applications like metabolomics.