Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account


State the final dilution obtained when using the RBC Unopette System.


List the reagent in the diluting fluid used in the RBC Unopette System.

1.99 mL normal saline and sodium azide in purified water

State the normal values for erythrocyte counts for adults, children, and newborns.

adult male: 4.6-6.2 * 10^5/ul
adult female: 4.2-5.4 * 10^6/ul
children: normal values slightly lower than adults
newborns: 4.8-6.0 * 10^6/ul

What errors can be caused by the apparatus?

chipped pipette tips, non-optically plane cover glasses, dirty chamber/coverglass, inaccurate rulings on chamber

What errors can be caused by personal technique?

not thoroughly mixing blood, inaqequate mixing of diluted specimen, failure to discard first few drops, counting cells inaccurately, not loading chamber properly, calculation error, clerical error

What errors are inherent in hemacytometry?

"field errors", statistical error

How does a field error occur?

relates to the random distribution of cells on the counting chamber

How does a statistical error occur?

when total number of cells is too low to give statistical confidence in result (reduced when large number of cells are counted)

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording