Rapid Centrifugation in the Routine Hemostasis Laboratory

Area of Science:

• Clinical laboratory science
• Hematology
• Biomedical engineering

Background:

• Laboratory automation relies on efficient centrifugation protocols.
• The applicability of rapid centrifugation in hemostasis testing remains under investigation.

Purpose of the Study:

• To evaluate the accuracy of a rapid, high-speed centrifugation scheme for diverse hemostasis tests.
• To assess the clinical relevance of measurements obtained using accelerated centrifugation.

Main Methods:

• Two centrifugation schemes were compared: 1,500 x g for 10 minutes and 3,137 x g for 7 minutes.
• A comprehensive panel of hemostasis tests was performed on patient samples.
• Statistical measures, including Spearman's rank correlation and coverage probability, were employed.

Main Results:

• High-speed centrifugation demonstrated strong correlation (Spearman's ρ ≥ 0.95) for most tests.
• Coverage probability indicated potential agreement issues for specific factors (FV, FVII, FX, FVIII, FIX, FXI) and VWF:GPIbM.
• Discrepancies were more sensitively detected by coverage probability than by Spearman's rank correlation.

Conclusions:

• Rapid, high-speed centrifugation is viable for most routine hemostasis parameters.
• Coverage probability is a more sensitive metric for assessing agreement between centrifugation methods in hemostasis testing.