Comparability of Instrument/Method

[Susan.Sullivan]

Howdy~ I am looking to see if anyone would "share" their policy for comparability of Instrument/Method. While Chem and Hemo have been doing this for years, I am now looking to compare my Echo with my bench techniques. I have some great forms and some basic knowledge, but I'm hoping this forum can share some existing policies. why re-invnet the wheel? THANKS!

[teskridge]

This is what we do..........

When more than one method can be used to perform testing in the Blood Bank, each method will be checked against each other at least twice a year for correlation of results. 3 patient samples for each different test method will be compared under actual testing conditions. Quality control data may be used for the comparison of results when the same manufacturer and lot number of reagents are being used.

The following tests will be compared: ABO/Rh typings, antibody screens, direct antiglobulin test, immediate spin crossmatch, full crossmatch, and blood type confirmations. The methods that will be compared are automated gel testing, manual gel testing, and tube testing (LISS and PEG).

[Eagle Eye]

how can you use same manufact., and lot# for your automation, manual gel & tube? If you have ProVue you need to use 0.8% and you can not use 0.8% for tube testing. ???????

[teskridge]

We compare our ProVue gel tests with our gel testing at the bench....which is the same manufacturer and lot number.

We compare our gel testing results with tube testing results (LISS, PEG), which uses 3% cells--different method, different manufacturer.