ASPT Specimen Collection Techniques 5

Question 1

Which of the following patient conditions is a contraindication for using the arm on a given side for venipuncture?

Accepted Answer

Recent mastectomy on that side

Answer

Venipuncture on the same side as a mastectomy risks lymphedema because lymph node removal impairs lymphatic drainage.

Question 2

A glucose specimen must be transported on ice to slow metabolism. Which tube is most commonly used for this purpose?

Accepted Answer

Gray-top sodium fluoride/potassium oxalate tube

Answer

Gray-top tubes contain sodium fluoride, which inhibits glycolysis and preserves glucose levels during transport.

Question 3

During a difficult draw, the phlebotomist repositions the needle slightly. This is acceptable when:

Accepted Answer

Only minor forward or backward adjustment is made without lateral movement

Answer

Minor advancement or slight withdrawal is acceptable, but lateral (side-to-side) movements risk vein and nerve damage and are prohibited.

Question 4

For a timed specimen such as a 2-hour postprandial glucose, the collection time is measured from:

Accepted Answer

When the patient finishes eating

Answer

The 2-hour postprandial interval is timed from when the patient finishes the meal, reflecting the peak-and-recovery glucose curve.

Question 5

A phlebotomist is asked to collect an arterial blood gas (ABG). Which of the following is within the ASPT phlebotomist's standard scope of practice?

Accepted Answer

Assisting with specimen labeling and transport after collection by authorized personnel

Answer

In most states, arterial puncture is outside a phlebotomist's standard scope; phlebotomists may assist with handling and transporting ABG specimens.

(ASPT) American Society of Phlebotomy Technicians Practice Test