Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 28

Given the following information, calculate the sperm concentration: dilution, 1:20; sperm counted in five RBC squares on each side of the hemocytometer, 80 and 86; volume, 3 mL.

A. 80 million/mL

B. 83 million/mL

C. 86 million/mL

D. 169 million/µL

Step 1 of 2

Calculate sperm concentration:

To calculate the sperm concentration in milliliter (mL), then multiple the number of sperms value by “1,000,000”.

• In the given data, the sperm counted in five RBC squares is “80” and “86”.

• The average of sperm counted in 5 RBC squares can be calculated by adding two values and divided by “2”.

• Thus, the average of “83” sperm are counted in five RBC squares.

Sperm concentration calculation is given below:

Therefore, the sperm concentration for the given data is “83000000/mL” also called “83 million/mL”. Hence, the correct answer is option .