When the electronic impedance principle is used to count blood cells, what is done to increase platelet-counting sensitivity?
a. Decrease the size of the RBC/platelet aperture.
b. Increase the size of the RBC/platelet aperture.
c. Use a strong lysing agent to selectively lyse the RBCs.
d. Lower the upper threshold for counting platelets so that even microcytic red cells are excluded.
ANS: A
To improve the sensitivity when counting platelets, the size of the RBC/platelet aperture is decreased.
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