A manual WBC count is performed using a system that makes a 1:20 dilution of blood.When the cells in the four large corner mm² of the hemocytometer are counted,the following numbers of cells are obtained: 8,12,9,and 11.What would be the next step? A)Count the cells in all 9 mm² of the hemocytometer. B)Redo the dilution of blood using a new 1:20 dilution. C)Redo the dilution of blood using a 1:100 dilution. D)Calculate the count using the values from the 4 mm² and report the result.

Question

Quizplus · Accepted Answer

This white count appears to be very low,in the neighborhood of 2.0 × 10⁹/L [(8 + 12 + 9 + 11)× 20/0.4].To make the cell count more accurate,the number of cells counted must be increased.This can be done by counting the cells in all 9 mm² of the hemocytometer.

A Manual WBC Count Is Performed Using a System That