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Sigma Metric Analysis
Seven Vitamin D methods E-mail

In a 2008 issue of Annals of Clinical Biochemistry, a study looked a seven different 25-hydroxyvitamin D methods, compared with liquid chromatography-tandem mass sepctometry. Using quality requirements developed by and derived from Stockl, Sluss, and Thienpont, we examine this methods with Sigma-metric analysis.

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Two HbA1c POC methods E-mail

 

In a 2009 issue of Annals of Clinical Biochemistry, a study takes on two Point-of-Care HbA1c devices using two different reference methods. Both POC methods are standardized to the IFCC reference system and aligned to DCCT standards via the National Glycohemoglobin Standardization Program (NGSP). Both reference methods are also standardized against the IFCC reference method and traceable to DCCT and NGSP. If everything is standardized and traceable, there can't be any problems, right?

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Vitros 5600 E-mail

A poster at the 2009 AACC conference evaluated the performance of the new VITROS 5600 system. VITROS is well known for its MICROSLIDE and MICROTIP technologies. We review the data and generate graphic analysis.

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Sysmex XT 1800i hematology E-mail

A poster at the IFCC conference applied Sigma-metric analysis to a number of hematology methods, including differential parameters, on the Sysmex xt 1800i. Interestingly, they chose Biologic-based quality requirements, not the usual CLIA goals. We review the data and generate some graphic analysis.

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Four Glucose Methods E-mail

Tight Glycemic Control is one of the latest trends in laboratory medicine - one that requires fast, frequent, and precise testing. A 2008 paper studied four different glucose methods, one POC, 2 blood gas, and one central laboratory hexokinase method. Can you guess which methods performed the best, and what methods were good enough to support TGC?

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