Quantitative automated human chorionic gonadotropin measurement in urine using the Modular Analytics E170 module...

Area of Science:

• Clinical Chemistry
• Laboratory Medicine
• Diagnostic Assays

Background:

• Laboratory performance optimization is crucial due to ongoing demands.
• Automation reduces manual labor, improving efficiency.
• Manual qualitative pregnancy tests require replacement with more robust methods.

Purpose of the Study:

• To validate an automated quantitative urine human chorionic gonadotropin (hCG) analysis.
• To replace the existing manual qualitative pregnancy test.
• To assess the performance of the Roche Modular E170 analyzer for urine hCG detection.

Main Methods:

• Validation of automated quantitative urine hCG analysis on the Roche Modular E170.
• Assessment of inter-assay and intra-assay variation at different hCG concentrations.
• Determination of analytical detection limit, stability, recovery, and matrix effects.
• Correlation study with manual qualitative pregnancy tests.

Main Results:

• Low inter-assay (4.3-6.8%) and intra-assay (2.6-3.0%) variations were observed.
• The analytical detection limit was 0.7 U/L, with no degradation during storage.
• Recoveries ranged from 93% to 112%, and the assay showed linearity unaffected by urine matrix.
• No discrepancies were found when compared to manual tests (cutoff 50 U/L).

Conclusions:

• The automated quantitative urine hCG assay on the Roche Modular E170 is a validated and reliable method.
• This automated assay can effectively replace manual qualitative pregnancy tests in clinical laboratories.
• The method demonstrates excellent precision, sensitivity, stability, and accuracy within the urine matrix.