Posted October 7, 2024Oct 7 comment_90727 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.
October 8, 2024Oct 8 comment_90732 Here's the SOP I used, it may be a little dated.H-1-17_Method Comparison (JPTM).docx
October 8, 2024Oct 8 comment_90736 Our "methods" are automated gel, manual gel & tube (PEG). We do not evaluate our alternate enhancements as different "methods".
October 8, 2024Oct 8 comment_90737 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.
October 8, 2024Oct 8 comment_90738 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!
October 8, 2024Oct 8 comment_90740 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.
October 8, 2024Oct 8 Solution comment_90742 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.
October 8, 2024Oct 8 comment_90751 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
October 8, 2024Oct 8 Author comment_90752 Can anyone explain the value of this effort to me? How do you change your tests if your results don't agree? (In Chemistry you probably recalibrate.) Do you just sign off when it is expected due to different sensitivity?
October 10, 2024Oct 10 comment_90777 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.
October 29, 2024Oct 29 Author comment_91054 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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