Posted by Sten Westgard, MS

Posted by Sten Westgard, MS

We knew that the accreditation agencies needed to develop their own policies to handle the new CMS IQCP regulations. CAP gets the prize for being first out of the gate with some practical steps, as well retaining some safeguards for quality.

IQCP, if it's not already burned into your head, stands for Individualized Quality Control Plan, and this is supposed to be the replacement for the EQC policies which have been in place for several years. The EQC policies are being replaced, you may recall, because they are scientifically untenable. It was hoped that IQCP was going to be more scientifically robust. That remains to be seen. CAP is attempting to assure that it will implement the CMS IQCP regulations but also provide a higher level of quality assurance than that low bar.

More after the jump.

Posted by Sten Westgard, MS

Posted by Sten Westgard, MS

Posted by Sten Westgard, MS

While traveling in the middle east recently, I was asked by a colleague about the new US IQCP regulations, specifically how to implement them in their foreign laboratory.

Frankly, I was a bit shocked. I didn't realize that anyone outside the US was paying attention to the IQCP roll-out.

But it does raise a good question: Is IQCP a global necessity? Or merely a US idiosyncrasy?

Posted by Sten Westgard, MS

Posted by Sten Westgard, MS

A recent question came in from a technical support consultant for a major diagnostic manufacturer:

"It is for Free T4 analyte. Customer [has] establihed a QC range after 20 QC runs. Mean and SD were derived from 20 runs and %CV achieved from 20 runs is 1.2%. Allowable interassay precision criteria according to CLIA is 6%.

"Now when customer [applies] Mean and SD according to the established range many...times they face QC rules violations of 41s and 10x.

"So can you please suggest, when the SD is too narrow is it necessary to apply these two rules to immunoassays?"

What's your guess? I'll take a stab at an answer, after the jump.

Posted by Sten Westgard, MS

I came across a very valuable paper in Clinica Chimica Acta on the stability of hematology controls for MCV. (Some of you are already guessing what this is going to be about...)

If you take a hematology control, how many SDs should you expect to see it shift at week 5 of use versus the first week of use? In other words, what is the SDI you should expect?

• 1 SDI
• 2 SDI
• 3 SDI
• 4 SDI
• 5 SDI
• higher than 5 SDI

The answer, after the jump...

Posted by Sten Westgard, MS

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...

Posted by Sten Westgard, MS

As many of you know, the FDA has issued new draft guidelines about Blood Glucose Monitoring Test Systems for Industry and Manufacturers.

Recently, the AACC held an excellent webinar where an Dr. Courtney Lias, PhD from the FDA discussed the intentions of the new guidances and then fielded a LOT of questions. I don't want to step on what Dr. Lias and the AACC accomplished during their webinar. There was useful information in that presentation and I encourage others to consider getting those materials once they become available on the AACC website.

However, while reading through the guidances and talking to laboratories these past few months, I thought I might share a few observations...

Posted by Sten Westgard, MS

Posted by Sten Westgard, MS

Posted by Sten Westgard, MS

Posted by Sten Westgard, MLO

In the November 2012 MLO magazine there is an intriguing article by Roy Midyett, a hematology supervisor, titled "Empty QC"

Here's how Mr. Midyett defines "Empty QC":

"Empty QC is any nominal QC that does not give techs performing the test any more confidence than they would have without the QC, and has by logic or experience, no influence on the reporting of the test."

Is Mr. Midyett correct? Have our QC procedures become meaningless gestures? More after the jump.

Posted by Sten Westgard, MS

So here's a Normalized Method Decision chart for a cholesterol method.

Which method would you choose?

Posted by Sten Westgard, MS

Here's a range of statistics describing the performance of a glucose method. Try to pick: Which one has acceptable performance?

1. method with combined uncertainty 3.69%
2. method with combined uncertainty 6.79%
3. method with expanded uncertainty 7.38%
4. method with expanded uncertainty 13.58%
5. method with 3.78 Sigma

Which method would you pick?

Posted by Sten Westgard, MS

At the AACC/ASCLS conference in San Diego, many of the Sigma VP laboratories contributed to a poster on evaluating the applicability of various analytical performance specifications for AST:

Multisite study of AST analytical performance reveals disparities in global performance specifications

The full poster can be downloaded from our westgard.com download section here. (free membership required)

But what was most rewarding was meeting with many of the co-authors who came to the meeting.

Ms Ginny Foo, Mr. Rajkumar Rengaraju, Co-authors from Innovative Diagnostics, Singapore

more pictures after the jump

From Dr. Carmen Ricos, on behalf o the SEQC-Analytical Quality Commission:

Posted by Sten Westgard, MS