Posted by Sten Westgard, MS
An interesting abstract was published at the Paris IFCC meeting. It detailed the EQA performance of a set of 12 public laboratories in Catalonia. Can you guess what the failure rate for these labs for biochemistry EQA?
- 14.5%
- 14%
- 3%
- none of the above
The answer, after the jump...
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Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Last month, Advance for the Laboratory published a three part series on Six Sigma in the Clinical Laboratory, written by David Plaut, Nathalie Lepage, and Kim Przekop:
While it's great that Advance has invested in in-depth coverage of the Six Sigma topic, unfortunately one of their examples in part 2 demonstrates a misunderstanding of the application.
See the mistake, after the jump...
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Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Two interesting abstracts and papers concerning HbA1c came out recently. As laboratories switch from fasting blood glucose to HbA1c to diagnosis diabetes, the importance of the method performance of HbA1c methods is becoming critical.
But what's more important? Bias or CV?
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Posted by Sten Westgard, MS
An important new study was published in the International Journal of Laboratory Hematology, on the QC practices of coagulation laboratories.
But here's a question for you: of all these activities, how many of them occur greater than 90% of the time - and which one doesn't?
- Repeat the QC, and if it passes, report results
- Open [and run] new QC
- Look for trending
- Discontinue testing until controls are within limits
- Repeat all patient samples from the last acceptable QC
To find out which one of the activities occurs at a frequency not like the others, follow the jump...
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Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
I was looking over a recent study of a compact blood gas analyzer conducted over multiple sites, multiple cartridges, multiple days, etc. In other words, this was a study that was doing a very thorough job.
Then I reached a section where suddenly it all fell to nonsense: measurement uncertainty.
So they calculated measurement uncertainty, but then they compared the results against Ricos desirable imprecision performance specifications.
Huh?
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Posted by Sten Westgard, MS
In Biochemia Medica, a recent article detailed the Minimum requirements for the estimation of measurement uncertainty:Recommendations of the joint Working group for uncertainty of measurement of the CSMBLM and CCMB.
Can you guess how many?
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Posted by Sten Westgard, MS
Posted by Sten Westgard, MS
Posted by Sten Westgard, MS