Phlebotomy Quiz

Which of the following is true about microcapillary collection?

• The first drop of blood should be wiped away.

• One can usually collect as much blood as in venipuncture.

• It is not necessary to wear gloves.

• The tourniquet needs to be tighter than for venipuncture.

Which of the following neonatal tests is required by law?

• hemoglobin

• Creutzfeldt-Jacob disease

• neonatal screening

• bilirubin

The safe area for heel puncture in an infant is:

• the arch of the foot

• the most medial and lateral portion of the plantar surface

• the center of the heel

• through the previous puncture

The depth of cut made by a puncture device for a heel stick on a full-term infant should be no more than:

• 1.5 mm

• 2.0 mm

• 2.8 mm

• 3.0 mm

What can happen if you squeeze the patient’s finger too vigorously during a capillary puncture?

• The sample will be diluted with tissue fluid.

• Hemolysis can occur.

• The blood will clot sooner.

• both A and B

Why must the first drop of blood from a capillary puncture be wiped away?

• to remove heparin or saline contamination

• to make the blood flow faster

• to wipe away any bacterial contamination

• to remove tissue fluid

You are to collect by fingerstick a green top, a lavender top, and a red top microcollection container. What microcontainer do you collect first?

• red top

• lavender top

• green top

• any container

When doing venipuncture on a child, whom should you talk to and explain the procedure to?

• child

• parent

• yourself

• both A and B

In a skin puncture procedure, hemolysis can occur from:

• a large size lancet

• heat application of the puncture site

• alcohol that has dried on the skin surface

• squeezing the heel or finger too hard

Warming the skin puncture site:

• results in hemolysis of the blood sample

• should not be done routinely because it will alter the chemical values in the blood

• should be performed with a hot towel (100 degrees Celsius)

• increases the blood flow through the arterioles and capillaries sevenfold