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 gauge needle is most commonly used for routine adult venipuncture?
Answer: 21 gauge
A 21-gauge needle is the standard choice for routine adult venipuncture, balancing adequate flow with minimal vein trauma.
When collecting blood cultures, which site should be cleansed first?
Answer: The venipuncture site
The venipuncture site skin must be disinfected before the bottle tops to prevent contamination of the blood culture.
A phlebotomist notices a hematoma forming during venipuncture. The correct immediate action is to:
Answer: Remove the needle immediately and apply firm pressure
A forming hematoma indicates blood leaking into tissue; the needle must be removed immediately and firm pressure applied.
What is the purpose of inverting collection tubes after blood draw?
Answer: To mix the additive with blood
Inverting tubes mixes the anticoagulant or additive evenly with the blood to ensure proper specimen integrity.
The antecubital fossa is the preferred venipuncture site because:
Answer: It contains large, accessible veins close to the surface
The antecubital fossa houses the median cubital, cephalic, and basilic veins, which are large, superficial, and stable.
Which of the following is a sign of a patent vein suitable for venipuncture?
Answer: Soft, bouncy, and visible or palpable
A patent vein feels soft and bouncy when palpated and springs back under pressure, indicating good blood flow.
During a capillary puncture on a finger, the FIRST drop of blood should be:
Answer: Wiped away with dry gauze
The first drop of blood is wiped away because it contains excess tissue fluid that can contaminate and dilute the specimen.