Blogs about: Laboratory Medicine
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Biological Variation and Assay Performance Standards
I had occasion to read about the suggestion that some fraction (often 50%) of biological variation should play a role in setting assay performance standards. This makes no sense to me. Here’s why. The… more →
Krouwer Consulting
Biological Variation and Assay Performance Standards
jkrouwer wrote 1 month ago: I had occasion to read about the suggestion that some fraction (often 50%) of biological variation s … more →
Measuring things, again
jkrouwer wrote 2 months ago: DB responded to my entry about “Just because it’s not easy to measure …”, which gave me mixed feeli … more →
Just because it’s not easy to measure …
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jkrouwer wrote 3 months ago: There have been several objections to measuring errors that are not as easy as calculating a standar … more →
The lighter side of trade shows
jkrouwer wrote 4 months ago: I have been going to the AACC (American Association for Clinical Chemistry) meetings for many years. … more →
No free lunches no magic bullets
jkrouwer wrote 4 months ago: At the recent AACC meeting, I went to a CLSI (Clinical And Laboratory Standards Institute) meeting a … more →
EP21 and pre-analytical errors
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jkrouwer wrote 4 months ago: The CLSI document EP21, which is about total error is being revised. First, some background. Clinic … more →
Why you need to be your own patient advocate with lab tests
jkrouwer wrote 5 months ago: Lab tests have error and sometimes very large errors. As the last blog entry showed, patient harm ca … more →
Pareto charts and running out of money
jkrouwer wrote 6 months ago: In the last blog entry, I said that ranking is not important* within a severity class. For example, … more →
EP18P3 – More comments on risk management - addition
jkrouwer wrote 6 months ago: Having a discussion with someone about the previous blog entry prompted me to make some additions to … more →
EP18P3 – New Version of laboratory risk management guideline
jkrouwer wrote 6 months ago: EP18 is the CLSI document about risk management. As it is being released there have been some commen … more →
The average and the individual – PSA screening and lab statistics
jkrouwer wrote 8 months ago: PSA has been in the news lately as two studies have been completed about the benefits (or lack there … more →
Beware of quality indicators
jkrouwer wrote 9 months ago: There is a new standard that is coming out at CLSI: GP35 “Development and Use of Quality Indicators … more →
Testing
pathlab wrote 9 months ago: Welcome to the world of laboratory medicine and those of us that spend our working life making a dif … more →
What is Green?
maijazi wrote 9 months ago: Culturally, green has broad and sometimes contradictory meanings. In some cultures, green symbolizes … more →
ISO 15189 Accreditation for Clinical Laboratories
jkrouwer wrote 11 months ago: I am not a big fan of ISO standards I have seen and have said so. For example I have critiqued ISO … more →
PSA Cutpoints
jkrouwer wrote 11 months ago: PSA Cutpoints Vickers and Lilja suggest that cutpoints in general are not a good idea and use PSA as … more →
Historical vs. New Mitigations in a FMEA
jkrouwer wrote 1 year ago: One of the things that I often encounter when looking at FMEAs is failure to distinguish between wha … more →
Comments on “Measurement uncertainty is not synonym of measurement repeatability or measurement reproducibility”
jkrouwer wrote 1 year ago: Of course, I agree with this statement (1) and here are some comments. First, some definitions and … more →
The formal version of "Six Sigma can be dangerous to our health"
jkrouwer wrote 1 year ago: I have previously blogged about this topic, here. Now, a more formal version has been published, fir … more →
