Routine Blood Collections — Phlebotomy Technician Practice Test
84 questions in this topic · 30 drawn at random this round
Which needle gauge choice is most likely to cause hemolysis of the specimen?
Session Progress
This Phlebotomy Technician Routine Blood Collections practice set has 84 practice questions based on the official exam materials, each with an instant explanation.
Sample questions
Three questions from the Routine Blood Collections bank with the correct answer and an explanation. The practice quiz above draws 30 questions at random from the same bank.
In the evacuated tube system (ETS), what is the function of the double-pointed needle?
- One end punctures the vein, the other end punctures the tube stopper — Correct answer
- It only punctures the vein and never touches the tube
- It is used solely for capillary puncture
- It replaces the tourniquet
Explanation: The ETS double-pointed needle has a patient end for venipuncture and a tube end (covered by a sleeve) that punctures the stopper of the collection tube seated in the holder. (Source: CLSI GP41 evacuated tube system design)
Handbook: Routine Blood Collections — Equipment
What is the primary purpose of the tube holder/adapter in the evacuated tube system?
- It seats the needle and tube so the tube's internal vacuum draws blood through the needle — Correct answer
- It sterilizes the needle before use
- It measures the patient's blood pressure
- It replaces the need for tube additives
Explanation: The tube holder (adapter) threads onto the needle hub and holds the evacuated tube in alignment so the tube's vacuum pulls blood through the needle once the stopper is punctured. (Source: CLSI GP41 evacuated tube system design)
Handbook: Routine Blood Collections — Equipment
Which collection method uses a hub-attached needle and a plunger to manually withdraw blood into a barrel, then transfers blood into tubes via a transfer device?
- Syringe method — Correct answer
- Evacuated tube system
- Dermal puncture
- Winged/butterfly set with direct tube draw
Explanation: The syringe method uses a needle attached to a syringe barrel; the phlebotomist manually pulls the plunger to draw blood, then uses a blood transfer device to fill tubes in the correct order of draw. (Source: CLSI GP41 syringe collection method)
Handbook: Routine Blood Collections — Equipment