Comparison Studies for iSTAT Chem 8 to Main Lab analyzer
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Hello,
Does anyone run Chem 8's on their iSTAT and run patient correlations to your Main Lab analyzer? I am running the HCT on the Chem 8 to our Beckman DXH and not all of my patients correlate as well as others. This has been the case for many years and I don't know if it is best to adjust my Allowable Total Error or how to go about this? We use the Chem 8 in the ED and they almost always get a CBC in the Main Lab as well so they do not treat on these results, it just gives them an idea where the patient is at. I have tried to use 6% as a acceptable limit for Allowable Total Error but using this guideline it will often fail. Does anyone have these problems with iSTAT HCT?
Does anyone run Chem 8's on their iSTAT and run patient correlations to your Main Lab analyzer? I am running the HCT on the Chem 8 to our Beckman DXH and not all of my patients correlate as well as others. This has been the case for many years and I don't know if it is best to adjust my Allowable Total Error or how to go about this? We use the Chem 8 in the ED and they almost always get a CBC in the Main Lab as well so they do not treat on these results, it just gives them an idea where the patient is at. I have tried to use 6% as a acceptable limit for Allowable Total Error but using this guideline it will often fail. Does anyone have these problems with iSTAT HCT?
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I regret to inform you, after extensive studies, we have blocked the reporting of the hematocrit result from ALL cartridges that run that test. The comparison was so significant that our Trauma ED & Adult ED complained and refused to rely on it. We have had to install Hemocues just for the accurate reporting of hemoglobins. Something Abbott is aware of.......
I echo Keith's response. We have found that the Hematocrit is not a very reliable test. We only report the results in one location and the result cannot be acted upon. We are in the process of removing i-STAT Hematocrits entirely.
Our medical director signed off on moving it up to 10% difference and it passes pretty well.
Verify the reference anticoagulant that you have customized in the istat DE matches your lab analyzer's. We run green/black tubes on the Sysmex to compare. The refence anticoagulant is set to K3EDTA in the istat DE and we have been able to meet the +/- 6% difference criteria at 12 campus labs.
We run the CG8+ cartridge and we've determined that the istat hematocrit can be unreliable at times so i agree with the others. Our perfusionists use the CPB mode which helps a lot, but they are the only ones that can use that and are allowed to report the full range. The only other team that runs hematocrits is our transport team but we don't allow them to report anything below 30%. It seems like that is where we saw the most issues with "bad" results. There was an article written about it that verified what we were seeing. I wish Abbott would come up with a better method.
I echo Keith's response. We have it disabled on our istats along with the iCA since we had no way of verifying. We worked with our OR team to find a solution to getting what they wanted since they were the ones pushing for the use. We came up with bright green laminated cards that said STAT OR. We discussed with them the fact that they were ordering from the lab a CBC with diff not an H and H which would decrease the TAT. Educating OR and lab has helped. They now order just and H and H, and bring to lab witht he bright lime green laminated card, and the LST's know to receive and bring to the Hematology department STAT.
We are revalidating the iStats for the OR, but having issues with the EG7+ cartridges and the pO2 and pCO2. They hardly correlate to the main lab Nova Prime Plus. Any ideas? How do you go about the 8% TAE from CAP?
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