Venipuncture and Phlebotomy Flashcards

Which collection device is best suited for drawing from small or fragile veins such as in the hand?

Answer: Butterfly (winged infusion) set

A butterfly set offers better control and a smaller gauge, ideal for small or fragile veins.

What angle and depth is appropriate for a heel stick on an infant?

Answer: Lateral or medial plantar surface, less than 2.0 mm deep

Infant heel sticks must be on the lateral or medial plantar surface and less than 2.0 mm deep to avoid bone injury.

Which antiseptic should NOT be used to clean the site for a blood alcohol level draw?

Answer: Isopropyl alcohol

Alcohol-based antiseptics can falsely elevate blood alcohol results, so a non-alcohol antiseptic is used.

What does the term 'hemoconcentration' refer to?

Answer: Increased concentration of cells and analytes from prolonged tourniquet use

Hemoconcentration occurs when prolonged tourniquet pressure causes plasma to leave the vessel, concentrating cells and analytes.

After a venipuncture, how should the phlebotomist promote hemostasis at the site?

Answer: Apply firm pressure with gauze for the needed time

Firm direct pressure with gauze until bleeding stops prevents hematoma formation and promotes hemostasis.

Which condition makes an arm unsuitable for venipuncture?

Answer: An arm on the same side as a recent mastectomy

The arm on a mastectomy side should be avoided due to lymphedema risk and possible inaccurate results.

What is the recommended action if no blood enters the tube after needle insertion?

Answer: Gently reposition the needle slightly

Gentle, slight repositioning may locate the vein, while aggressive probing risks nerve injury and pain.