Your co-worker, Jayson Clarke, has just performed a phleboto…

Your co-worker, Jayson Clarke, has just performed a phlebotomy on a patient. He was trying to completely fill a 4.5 mL EDTA Vacutainer tube (purple top) with blood. He was only able to fill the tube 1/3 the way with blood and wants to know if this sample is acceptable for a magnesium assay. Which is the most correct answer to tell him?

A laboratory is evaluating the precision of its serum sodium…

A laboratory is evaluating the precision of its serum sodium assay. Over 20 days, they measure a control sample with a mean sodium concentration of 140 mmol/L. The standard deviation of these measurements is 1.4 mmol/L. What is the coefficient of variation (CV) for this assay?

A clinical chemistry laboratory is comparing the precision o…

A clinical chemistry laboratory is comparing the precision of two different glucose analyzers. They conducted 40 replicate measurements on the same quality control sample using both analyzers and obtained the following results: Analyzer A:Mean glucose: 100 mg/dLStandard deviation: 2 mg/dL Analyzer B:Mean glucose: 200 mg/dLStandard deviation: 3 mg/dL Which of the following statements is correct regarding the precision of these analyzers?