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Correlation Testing in Blood Bank


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Posted

I feel like I saw that AABB added a standard that requires us to do correlation testing twice per year between antibody screening methods.  Can anyone tell me which standard it is?  I would also love to hear what you do for this standard when we expect Saline, Gel, PEG etc. to react differently and use those differences to avoid weak warm autos etc.

 

Posted

I don't have access to Standards anymore (I'm retired), and I don't recall if AABB requires them. The Joint Commission definitely does, and it asked for our 6-month correlations during every inspection.

Posted

We use our "old" CAP samples...........

Once they've been turned in and reported, we assign them to techs using our "other" methods.

SOP is gel/Ortho Vision Max

Additional testing then would be manual gel, Peg, LISS, Saline.

Same for titers and DAT's

Seems to work pretty well for us!

Posted
16 minutes ago, Bet'naSBB said:

We use our "old" CAP samples...........

Once they've been turned in and reported, we assign them to techs using our "other" methods.

SOP is gel/Ortho Vision Max

Additional testing then would be manual gel, Peg, LISS, Saline.

Same for titers and DAT's

Seems to work pretty well for us!

This is a good solution, I would like to suggest that you do not retest them until after the due date, not just the date you reported them.

  • Solution
Posted

It is standard 5.1.2.4: The laboratory shall evaluate the comparability of test results obtained using different methods, instruments and if applicable testing sites. This shall be performed twice annually.

  We use old CAP samples or known patient samples with antibodies. Test them on the analyzer and with PEG on the bench. 

Posted
On 10/8/2024 at 9:09 AM, Cliff said:

after the due date, not just the date you reported them.

yes, that's what we wait for...........and we usually get behind and don't end up handing them out until we've already received the results. :D

  • 3 weeks later...
Posted
On 10/8/2024 at 1:30 PM, sgoertzen said:

Here is the form that we use.  You need to have something written in policy that accounts for the expected variability of reactions when comparing different methods.  We have multiple methods for ABO/Rh, Antibody Screen, Antigen Typing, Antibody ID, and AHG Crossmatch, so we have to do method comparison on all of these.

TQ-0530F03 Method Comparison__blank_copy_id_10835032.pdf 186.41 kB · 20 downloads

Do you use only one method for DAT testing? I don't see it on the list.

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