Medical Laboratory Quiz

Glycolysis occurring in a tube of unseparated blood will cause:

• binding of serum glucose

• no change in the serum glucose concentration

• a decrease in serum glucose concentration

• an increase in serum glucose concentration

What does NPO mean?

• note previous order

• nothing by mouth

• patient not in room

• none of the above

The glucose tolerance test:

• lasts 1 hour

• is a monitor of blood glucose after ingestion of 300 grams of glucose

• may be collected in a light blue top tube

• is performed to aid in the diagnosis of diabetes mellitus

You receive an order to draw a STAT CBC. Your responsibility is to:

• draw blood in a lavender tube and send it to the lab promptly

• draw blood in a heparinized tube and give it to the nurse

• use any color tube and send it to the lab promptly

• draw blood in a gray tube and wait until you finish your work to take it to the lab

What is the major drawback of a 24-hour urine collection?

• Patient cooperation is essential and is often hard to get.

• The tests done on a 24-hour urine sample are unreliable.

• Doctors don’t know when to order them.

• Preservatives must be used.

The process for prepping the puncture site for this procedure is similar to that for an arterial puncture. What is the procedure?

• capillary puncture

• bleeding time

• blood culture collection

• routine venipuncture

Which test is NOT usually done to detect clotting problems?

• bleeding time

• PT

• platelet count

• PTT

• glucose

The gray top tube is usually drawn for which test(s)?

• enzyme tests

• PTT

• hematology tests

• glucose

Which of the following statements concerning bleeding time testing is true?

• You should touch the drop of blood only with the filter paper.

• A stopwatch should be started at the same time as the puncture is made.

• It is used to assess platelet function.

• all of the above

The glucose tolerance test includes:

• administration of glucose

• multiple timed blood draws

• use of heparinized syringe

• both A and B