Mabel Adams Posted October 7, 2024 Posted October 7, 2024 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. Yanxia 1
Cliff Posted October 8, 2024 Posted October 8, 2024 Here's the SOP I used, it may be a little dated.H-1-17_Method Comparison (JPTM).docx Mabel Adams 1
Kelly Guenthner Posted October 8, 2024 Posted October 8, 2024 Our "methods" are automated gel, manual gel & tube (PEG). We do not evaluate our alternate enhancements as different "methods". Mabel Adams 1
Cliff Posted October 8, 2024 Posted October 8, 2024 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. Mabel Adams 1
Bet'naSBB Posted October 8, 2024 Posted October 8, 2024 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! Mabel Adams and AuntiS 2
Cliff Posted October 8, 2024 Posted October 8, 2024 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. AuntiS, Mabel Adams and John C. Staley 3
Solution bblover Posted October 8, 2024 Solution Posted October 8, 2024 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. Mabel Adams and AuntiS 2
sgoertzen Posted October 8, 2024 Posted October 8, 2024 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 Mabel Adams 1
Mabel Adams Posted October 8, 2024 Author Posted October 8, 2024 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? John C. Staley and Kelly Guenthner 2
Bet'naSBB Posted October 10, 2024 Posted October 10, 2024 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. Cliff 1
Mabel Adams Posted October 29, 2024 Author Posted October 29, 2024 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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