Increased enzyme activity is typically observed in serum or plasma:

The chromogen for the fecal occult blood test is

What technology minimizes the problems of a rigid aperture including protein buildup, coincidence, and a single cell being counted twice?

Which of the following is always calculated on cell counters?

What is the recommended method for establishing accuracy of automated hematology analyzers?

How often must the partial thromboplastin time (PTT) reference interval be determined?

A patient sample comes off an automated cell counter with a failure of the red cell “rule of three”. The red count is lower than expected given the hemoglobin. The mean cell volume (MCV), mean cell hemoglobin (MCH), and mean cell hemoglobin concentration (MCHC) are elevated. Which of the following is the most likely reason for this failure?

Which of the following conditions is associated with an elevated fibrinogen?

Which of the following results is not considered a normal urine value?

Which of the following is an acceptable sample for a prothrombin time test?