How do CELL-DYN instruments differentiate red cells and platelets from one another?
a. Differences in forward scatter using optical light scatter principle
b. Use of a unique reagent that selectively lyses red cells while preserving platelets
c. Differences in volume (fL) using electrical impedance principle
d. Use of a unique reagent that selectively lyses platelets while preserving red cells
ANS: C
CELL-DYN instruments use electrical impedance for counting and discriminating red cells and platelets. Pulses between 1 and 35 fL are included in the initial platelet data, whereas pulses greater than 35 fL are counted as red cells.
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