Lab Med Online.  2020 Apr;10(2):137-143. 10.3343/lmo.2020.10.2.137.

Evaluation of Automated Platelet Aggregation Test Using a Sysmex CS-5100 Analyzer

• An GD
• Jeong IH
• Lim HH
• Woo KS
• Kim KH
• Kim JM
• Han JY

• KMID: 2512244
• DOI: http://doi.org/10.3343/lmo.2020.10.2.137

Abstract

Background
The platelet aggregation test is widely used to measure antiplatelet therapy response and to detect platelet function disorders. CS-5100 (Sysmex Co., Japan) is a recently introduced coagulation analyzer that can also measure platelet aggregation. We evaluated the performance of CS-5100 in the platelet aggregation test for use in clinical laboratories.
Methods
We investigated the precision, stability, dilution test, and correlation of CS-5100 with a traditional aggregometer. Precision was tested using normal and patient samples. Stability was assessed over 5 different time points for 8 hours. The dilution test was performed with normal samples using ADP agonists. We tested correlations between the results of Chrono-log aggregometer (Chrono-Log Co., USA) and CS-5100 using 10 samples with 5 agonists each. We also calculated the reference range of 5 agonists using 22-30 normal samples.
Results
The coefficients of variation using normal samples were 7.45% and 3.27% for ADP and arachidonic acid, respectively. Stability was maintained for up to 2 hours in most samples. Dilution tests showed similar results until reaching a dilution factor of 2. Strong correlations of the results between Chrono-log and CS-5100 were found, except for ristocetin. The reference ranges of 5 reagents in CS-5100 were similar to those obtained with the Chrono-log aggregometer.
Conclusions
The performance of CS-5100 in platelet aggregation tests showed reliable results compared to a traditional aggregometer. CS-5100 can perform coagulation test and platelet aggregation test, simultaneously. Thus, CS-5100 can enable cost saving and reduce turn-around-time by reducing the inspection time.

Keyword

CS-5100; Platelet aggregation test; Coagulation instrument; ADP; Arachidonic acid

Figure

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  Fig. 1 Correlation of the test results between Chrono-log aggregometer and CS-5100 aggregation assay. (A) ADP, (B) Arachidonic acid, (C) Collagen, (D) Epinephrine, and (E) Ristocetin.

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