Free Practice Quiz Question List

3 Glucose Testing and Timed Collections Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Glucose Testing and Timed Collections, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

A patient arrives for a random glucose test without having fasted. Can the specimen still be collected without fasting?

A
True
B
False

Choose one

1 point

A patient asks whether drinking plain water during the required fast will invalidate a fasting plasma glucose specimen. Which guidance best matches the usual preparation?

A
The patient must avoid all food and water for 8 hours.
B
The patient should have had no caloric intake for at least 8 hours; plain water is usually allowed.
C
The patient should avoid calories for 4 hours, but water is not allowed.
D
The patient may eat normally as long as the specimen is collected in the morning.

Fill in the blank

1 point

After blood is collected, blood cells continue to consume glucose through , which can falsely lower the measured concentration.

Written response

1 point

For a usual fasting plasma glucose test, what is the minimum number of hours without caloric intake before collection?

Choose one

1 point

A laboratory's protocol specifies a gray-top tube for a glucose specimen. Which handling plan is most appropriate?

A
Use any tube because glucose is stable in unseparated blood.
B
Use a gray-top tube and delay processing because fluoride immediately stops glycolysis.
C
A gray-top tube with sodium fluoride and potassium oxalate is commonly used, but still process promptly.
D
Use a serum tube and leave it in contact with cells until testing.

Choose all

1 point

Select all checks to complete before collecting a glucose specimen.

A
Verify the patient's identity.
B
Assume the patient fasted if the test is scheduled in the morning.
C
Confirm the requested test and whether fasting is required.
D
Check that the correct collection supplies are available.

True or false

1 point

A gray-top tube containing sodium fluoride is used, so prompt processing is unnecessary because fluoride immediately stops glycolysis.

A
True
B
False

Fill in the blank

1 point

In the described adult, nonpregnant OGTT procedure, collect the specimen before the patient drinks the glucose solution.

Choose one

1 point

For the common adult, nonpregnant OGTT described, when should the timer start, unless the specific protocol directs otherwise?

A
When the patient finishes the glucose drink in every protocol.
B
When the patient starts the glucose drink, following the protocol.
C
When the fasting specimen reaches the laboratory.
D
At the first post-drink blood draw.

Written response

1 point

When labeling a timed glucose specimen, what exact time information should accompany its test interval, such as “1 hour”?

Choose all

1 point

During an OGTT, a patient vomits before a scheduled draw. Select all appropriate actions.

A
Document what happened.
B
Silently collect at a later time and label it with the originally ordered interval.
C
Contact the laboratory or ordering clinician for instructions.
D
Discard the event from the record if the patient feels well.

Choose one

1 point

A pregnant patient is scheduled for glucose testing. Which approach best avoids applying the wrong collection schedule?

A
Use the common adult nonpregnant 75-g schedule for all pregnancy testing.
B
Treat a glucose challenge test and diagnostic OGTT as interchangeable.
C
Skip the order-specific protocol if the patient has fasted overnight.
D
Follow the ordered pregnancy protocol because screening and diagnostic procedures differ.

Open ended

1 point

A patient arrives for a timed glucose test after an incomplete fast. Later, one scheduled specimen is collected late and its tube is labeled only with the intended interval, not the actual collection time. What should staff do, and why might the result be unreliable?

Choose one

1 point

A postprandial glucose order specifies a collection interval but staff are unsure whether timing begins at the start or end of the meal. What should they do?

A
Always start timing when the patient finishes the meal.
B
Use the time anchor specified in the order, which may be the beginning or end of the meal.
C
Start timing when the specimen is labeled.
D
Use the OGTT timing rule for every postprandial test.

True or false

1 point

A patient who has eaten recently can still have a random glucose specimen collected.

A
True
B
False

Written response

1 point

What process can cause blood cells to consume glucose after collection and falsely lower the measured concentration?

Choose one

1 point

A patient has several glucose specimens collected at timed intervals. Which labeling approach best ensures that each specimen can be matched to its collection time?

A
Label only the first tube with the patient’s identifiers, then arrange the other tubes in collection order.
B
Label each tube separately with the patient’s identifiers and its exact collection time or test interval.
C
Label each tube only with the test name because the laboratory can infer the interval from the draw sequence.
D
Label the tubes with the scheduled intervals, but omit actual collection times even if a draw is delayed.

Written response

1 point

A patient reports having no caloric intake since 22:30. The fasting glucose specimen is collected at 06:45 the next morning. How many hours have elapsed since the last caloric intake?

Choose one

1 point

A glucose specimen is collected in a gray-top tube containing sodium fluoride and potassium oxalate. Which handling decision is most appropriate?

A
The tube makes prompt processing unnecessary because fluoride stops glycolysis immediately.
B
The tube is unsuitable for glucose testing because fluoride increases glycolysis.
C
The tube is commonly used, but prompt processing remains important because fluoride’s inhibition of glycolysis is not immediate.
D
The tube is used only when serum must be left in contact with cells for an extended period.

Choose one

1 point

A postprandial glucose order specifies that the collection interval starts at the end of the meal. What should you do to time and document the specimen?

A
Start the interval when the patient begins eating, regardless of the order.
B
Use the order’s stated timing anchor; if it specifies the end of the meal, time from the end and record the required meal and collection times.
C
Start the interval when the patient arrives for the blood draw.
D
Use the same timing anchor for every postprandial test, even when the order specifies otherwise.