Lecture 3

Question 1

Why is plasma preferred over serum for many STAT lab tests?

Answer 1

Patient test results can be available quicker

Question 2

If a tube manufacturer has made a tube with a purple shield over a yellow stopper and all you know about the tube is that it contains EDTA, where do you put this tube in the recommended order of draw?

Answer 2

Between a green stopper tube and a gray stopper tube.

Question 3

If a lavender shield tube is collected before a light green shield tube, which of the following could occur?

Answer 3

Falsely elevated potassium test results

Question 4

If a gray stopper tube is collected before a lavender shield tube, which of the following could occur?

Answer 4

Distortion of blood cells on WBC differentials

Question 5

Specimen obtained from the wrong patient.

Pre, analytical, or post?

Answer 5

Pre

Question 6

Failure to notice instrument flags.

Pre, analytic, post?

Answer 6

Analytic