Author Question: In the four large corner squares of a hemocytometer, 95, 102, 105, and 98 white cells were counted ... (Read 78 times)

nmorano1 · **on:** Jun 25, 2018

In the four large corner squares of a hemocytometer, 95, 102, 105, and 98 white cells were counted from a 1:20 dilution. Select the correct interpretation for the white blood count calculated from these values.

a. Normal for infant and elevated for an adult
b. Normal for any patient
c. Elevated for any patient
d. Normal for an infant and decreased for an adult

Question 2

Manual cell counting methods in automated hematology laboratories are used for all of the following except:

a. Routine testing
b. Very low counts
c. Malfunctioning automated instruments
d. Counting spinal fluids

itsakadoozi · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

ANS: A
The cell count is (95 + 102 + 105 + 98) 20)/(4 mm2 0.1 mm) = 20.0 103/mL = 20.0 109/L. This count is elevated for an adult but normal for a newborn.

Answer to Question 2

ANS: A
A hematology analyzer does routine testing in an automated hematology laboratory. However, when counts are very low, including spinal fluid cell counts, and if the instrument is malfunctioning, manual cell counting is usually performed.