Blood Gas Cross Checking
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We utilize iSTATs for blood gases out on the floor for open heart patients here as well as 2 Rapid Point 500s in our main lab for other blood gases. I currently do the CAP survey that cross checks the Rapid Points and one that cross checks the iSTATs. However, CAP does not have anything to cross check the two different testing capabilities. Do any of you have a policy on what you use for this? I was talking with our medical director about potentially using 5 different patient samples (2 arterial and 3 venous) 2x a year. But also what should the passing criteria be? Thoughts or suggestions? Thank you!
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So we use Cross Checks also to meet the PT requirement and we do exactly as you suggested- 5 patient samples for correlation between methods. We also include a capillary as we have that specimen type and we just get a lab coworker volunteer to be stuck for that one. We use our allowable tolerance that our medical director came up with after looking at CLIA acceptance limits but also she looked at CAP survey result booklets to see what was listed there to come up with she wanted.
We have EPOCs as our POC, and Radiometer ABL90s for the lab. We use the CAP AQHQs on the EPOCs and plot a meter-to-meter comparison in EP evaluator (6 meters each course) We then also do lab-to-meter correlations with 5 random patient samples. The evaluation criteria would be the criteria that is provided with the AQQs (found in the result booklets.). We use this same criteria for evaluating linearities as well.
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