A multicenter study to evaluate automated platelet aggregometry on Sysmex CS-series coagulation analyzers-preliminary...

Area of Science:

• Hematology
• Clinical Chemistry
• Laboratory Medicine

Background:

• Traditional light transmission aggregometry (LTA) for platelet function testing is time-consuming and labor-intensive.
• A multicenter study was conducted to evaluate an automated LTA method.
• The study aimed to establish reference ranges and an optimal testing regimen using a coagulation analyzer.

Purpose of the Study:

• To evaluate an automated light transmission aggregometry (LTA) method.
• To establish reference ranges for platelet function testing using a coagulation analyzer.
• To determine the ideal testing regimen for automated LTA.

Main Methods:

• Sysmex CS-2x00 series analyzers were utilized for automated LTA.
• A range of agonists including ADP, arachidonic acid, collagen, ristocetin, epinephrine, TRAP, and U46619 were tested at various concentrations.
• Key aggregation parameters such as maximum aggregation, final aggregation, disaggregation, slope, and acquisition time were analyzed.

Main Results:

• No significant differences in aggregation parameters were observed for several tested concentrations of ADP, arachidonic acid, collagen, ristocetin, epinephrine, and TRAP in normal subjects.
• Maximum platelet aggregation was achieved within 300 seconds for ADP, U46619, collagen, ristocetin, and TRAP at specific concentrations.
• Other agonists required 600 seconds for maximum aggregation.

Conclusions:

• A standardized panel of agonists and concentrations is suitable for automated LTA on Sysmex CS-2x00 analyzers.
• Recommended observation times are 600 seconds for most agonists and 300 seconds for TRAP and U46619.
• Automated analyzers could potentially replace dedicated aggregometers, expanding LTA availability.