Random and continuous-access immunoassays with chemiluminescent detection by Access automated analyzer

Area of Science:

• Clinical Chemistry
• Immunodiagnostics
• Laboratory Automation

Background:

• Automated immunoassay systems are crucial for efficient and accurate diagnostic testing.
• Heterogeneous enzyme immunoassays require sophisticated instrumentation for reliable performance.
• The demand for rapid and precise diagnostic tools necessitates advancements in analytical systems.

Purpose of the Study:

• To evaluate the performance and capabilities of the Access Immunoassay System.
• To assess the accuracy, precision, and throughput of the automated analyzer.
• To determine the clinical utility of the Access system for various immunoassays, including infectious disease testing.

Main Methods:

• The Access Immunoassay System was utilized for automated random and continuous-access testing.
• The system accommodates various assay formats (one- and two-step, sandwich, competitive) and sample volumes.
• Chemiluminescent detection with a paramagnetic microparticle solid phase was employed for signal generation.

Main Results:

• Throughput ranged from 50-100 tests per hour with high precision (within-run CVs 2.0%-9.2%, total CVs 3.4%-11.1%).
• Method comparison studies showed strong correlation (r >= 0.94 for 12/14 assays) with established procedures.
• The Chlamydia assay demonstrated high sensitivity (90%) and specificity (99.7%) compared to culture methods.

Conclusions:

• The Access Immunoassay System is a versatile and reliable automated analyzer for heterogeneous enzyme immunoassays.
• The system offers high throughput, excellent precision, and strong correlation with existing methods.
• The Access system shows significant clinical utility, particularly for infectious disease diagnostics like Chlamydia detection.