You arrive at the clinical chemistry laboratory one morning and discover that personnel from the third shift left you the QC sheet from the thyroid-stimulating hormone (TSH) run. The technician has circled the level I TSH control values, and you realize that all six of the level I control values are +3 s from the mean. No results have been released. Now it’s your decision regarding what to do next. What kind of error is most likely occurring?

Which one of the following statements concerning lipase is incorrect?

When you receive a urine sample for legal testing of drugs of abuse, you must maintain a(n) _____ to identify all individuals involved in specimen collection, transfer, and testing.

In the majority of clinical chemistry immunoassays, the analyte of interest in a patient’s serum is typically the:

Creatininase reactions for creatinine assessment:

Hyperproteinemia is caused by:

A 24-hour urine has a total volume of 1200 mL.  A 1:200 dilution of the urine specimen gives a creatinine result of 0.8 mg/dl. The serum value is 1.2 mg/dl.  What is the final value of creatinine in mg/dl in the undiluted urine sample?

The therapeutic range of a drug is:

Which one of the following is the correct formula for determining glomerular filtration rate?

The chromogen for the fecal occult blood test is