Patient /method comparison EG7+ iStat

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We are revalidating the iStat for one of our departments but having issues with the EG7+ cartridges and the pO2 and pCO2 comparison. They sometimes do not correlate to the main lab Nova Prime Plus. Any ideas? We run 5 patients. How do you go about the 8% and /or 3SD TAE from CAP? Can we increase the TAE? Thanks!

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Vivian,
 We attempted to validate the Nova Prime Plus device at our facility.  We had a lot of trouble having the Nova Prime Plus staying within the TAE for several analytes including PO2. When we compared the Prime Plus device to the lab and to the istat, the istats would compare normally to the lab (not great, but within TAE), but the Prime plus device after cartridge changes or even the next day, the results for the Prime Plus would drift away from the lab and the istats. 

If the option is available, I would throw another device type in the comparison to see what is drifting from what.

Our facility only uses iSTAT for our blood gases, I do not have any other method to compare them with. In this case I assume running proficiency testing and QC is sufficient enough? Joint Commission states that we do not have to run like cartridge to like cartridge correlations. Does anyone run two different gas cartridges such as EG6+ and CG4+, should I be correlating those to each other every 6 months?

We only use the EG7+ for blood gas. Maybe you can send samples to another lab for comparison. We might need to call CAP for clarification.

Thak you all for your input. :-) 

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Vivian Morales
about 2 years ago
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