Specimen Collection Techniques Flashcards
7 cards from real ASPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Specimen Collection Techniques flashcards as text
Which of the following patient conditions is a contraindication for using the arm on a given side for venipuncture?
Answer: Recent mastectomy on that side
Venipuncture on the same side as a mastectomy risks lymphedema because lymph node removal impairs lymphatic drainage.
A glucose specimen must be transported on ice to slow metabolism. Which tube is most commonly used for this purpose?
Answer: Gray-top sodium fluoride/potassium oxalate tube
Gray-top tubes contain sodium fluoride, which inhibits glycolysis and preserves glucose levels during transport.
During a difficult draw, the phlebotomist repositions the needle slightly. This is acceptable when:
Answer: Only minor forward or backward adjustment is made without lateral movement
Minor advancement or slight withdrawal is acceptable, but lateral (side-to-side) movements risk vein and nerve damage and are prohibited.
For a timed specimen such as a 2-hour postprandial glucose, the collection time is measured from:
Answer: When the patient finishes eating
The 2-hour postprandial interval is timed from when the patient finishes the meal, reflecting the peak-and-recovery glucose curve.
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?
Answer: Assisting with specimen labeling and transport after collection by authorized personnel
In most states, arterial puncture is outside a phlebotomist's standard scope; phlebotomists may assist with handling and transporting ABG specimens.
What is the rationale for warming the heel or finger before a capillary puncture?
Answer: It increases local blood flow (arterialization) for an adequate sample
Warming the site dilates capillaries and increases arterial blood flow (arterialization), making it easier to obtain a sufficient blood volume.
Which of the following BEST describes the correct labeling practice for a blood specimen?
Answer: Label tubes at the bedside immediately after collection, in front of the patient
Tubes must be labeled immediately after collection at the patient's side to ensure accurate patient identification and prevent specimen mix-ups.