Validation & CE-marking of the PC100 platelet counter

VALIDATION OF THE PC100 PLATELET COUNTER

Validation of the PC100 platelet counter is performed for human whole blood and PRP measurements. The validation ranges for whole blood are [20-600] and for PRP [250-3600] plt/nl.

The validation was performed by Maastricht UMC+, Clinical Thrombosis & Hemostasis Department in the Netherlands.

Comparison of the PC100 against the SYSMEX XP-300 and Sysmex XN-9000

In a study published in May 2021 in ‘Thrombosis Journal’ the closeness of agreement between a newly developed point-of-care PC100 platelet counter and two reference methods (Sysmex® XP-300, Sysmex® XN-9000) in measuring platelet counts in whole blood and platelet-rich-plasma (PRP) was assessed. Using blood of 119 individuals of which 74 were used to prepare PRP samples.

Results

Results show a median difference of − 1.35% and − 2.98% occurred in whole blood platelet count between the PC100 platelet counter and the Sysmex® XP-300 and Sysmex® XN-9000, respectively. A strong linear correlation (r ≥ 0.98) was seen in both cases and regression equations indicated neither a constant nor a proportional bias between the methods. Direct comparison of the two reference methods revealed a median difference of − 1.15% and a strongly linear relationship (r = 0.99). Platelet count in PRP resulted in a median difference of 1.42% between the PC100 platelet counter and the reference method, Sysmex® XP-300. While the difference between two methods increased with concentration of platelets in PRP, a strong linear relationship remained throughout the whole measuring interval indicated by the high correlation coefficient (r = 0.99). Assessment of the predicted bias at predefined platelet counts showed that the bias in platelet counts falls within the acceptance criterion for both whole blood and PRP measurements.

Conclusions

Our results show that the PC100 platelet counter can be used interchangeably with the reference methods for determining platelet counts.