Different Re-centrifugation Conditions for Infectious Disease Screening Using the Abbott I2000

Area of Science:

• Clinical diagnostics
• Laboratory centrifugation techniques

Background:

• Infectious disease screening relies on precise sample preparation.
• Standard operating procedures (SOPs) for centrifugation are critical for accurate diagnostic results.

Purpose of the Study:

• To evaluate if an ordinary centrifuge can meet the centrifugal force requirements for infectious disease screening.
• To compare the efficacy of different centrifugation forces on diagnostic test results.

Main Methods:

• Samples were categorized into negative, weak-positive, and positive groups.
• Re-analysis involved centrifuging samples at 10,000 × g (recommended) and 2,750 × g.
• Cronbach's alpha was used to assess consistency across different centrifugation conditions.

Main Results:

• No significant differences in test results were observed between the two centrifugation forces.
• Strong correlation in quantitative values was found between 10,000 × g and 2,750 × g.
• High consistency (Cronbach's alpha > 0.8) was achieved for detecting Treponema pallidum, HIV, HCV, and Hepatitis B surface antigen.

Conclusions:

• Ordinary centrifuges can achieve results comparable to high-speed centrifuges for infectious disease screening.
• Adherence to recommended relative centrifugal force and proper clotting time is essential.
• Centrifugation conditions did not significantly impact diagnostic accuracy regardless of initial sample status.