NHA Certified Phlebotomy Technician (CPT)Collection RoutineEasy
A phlebotomy technician is preparing to perform a venipuncture on a patient with fragile, superficial veins. Which of the following venipuncture devices is most appropriate to minimize trauma and prevent vein collapse?
- A20-gauge winged infusion set with a vacuum tube system
- B21-gauge straight needle with a vacuum tube system
- C23-gauge winged infusion set with a syringe
- D18-gauge straight needle with a vacuum tube system
Show answer & explanationAnswer & explanation
Correct answer: C. 23-gauge winged infusion set with a syringe
For fragile and superficial veins, a smaller gauge needle (like 23-gauge) helps prevent vein trauma, and a winged infusion set (butterfly) provides better control. Using a syringe allows for a controlled, gentle draw pressure, which further minimizes the risk of vein collapse.
Why the other options are wrong
- A. A 20-gauge needle might still be too large, and a vacuum tube system can exert too much pressure on fragile veins, leading to collapse.
- B. A 21-gauge needle might be too large for fragile veins, increasing trauma risk.
- D. An 18-gauge needle is too large and would cause significant trauma to fragile veins.
Fragile Vein Venipuncture
Techniques and equipment used to safely draw blood from patients with delicate or easily collapsible veins.
- Use smaller gauge needles (e.g., 23-gauge).
- Winged infusion sets (butterflies) offer better control.
- Syringe method allows for controlled, gentle aspiration.
Memory trick: Butterflies Gently Sip from Fragile Flowers.